[png-mng-announce] pngcheck 2.2.0 (was Re: Suite of broken images)

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"Chris Nokleberg" <ch...@si...> wrote:

> The latest suite of broken PNGs is available here:
>   http://downloads.sourceforge.net/javapng/brokensuite-20061201.zip

And the latest release of pngcheck is here:

	http://www.libpng.org/pub/png/apps/pngcheck.html

It detects errors in all but two of the 107 broken images, the holdouts
being:

OK: splt_duplicate_name.png (32x32, 8-bit colormap, non-interlaced, -29.9%).
  (would need to keep hash table or linear array of seen sPLT names)

OK: ztxt_data_format.png (32x32, 4-bit grayscale, non-interlaced, -47.1%).
  (need to revise whole zlib section)

The first one is a lot of effort for a relatively trivial problem, so
I'm in no particular hurry to address it.  The second one (i.e., cleaning
up the zlib code) is pretty high on my priority list, but...this weekend
is over, so check back in a few months.

> It now includes over 100 images. I've finally worked through my
> checklist of things to check for, so I don't anticipate many future
> updates. Of course I'm sure I've missed some things so if you come
> across a corrupted or otherwise problematic image let me know.

Three comments:

 - You should include some "private" values (typically > 127).  The
   spec is somewhat ambiguous and/or contradictory on these, but it
   seems fairly clear that they're OK if you're messing with them in
   the privacy of your own home.

 - You might consider adding a sCAL image with negative values and/or
   sCAL or a text chunk with a trailing NULL.

 - At least one of your images (ihdr_1bit_alpha.png) has at least two
   errors in it.  That's fine, but I believe one of the errors is present
   in a different file, so it's sort of superfluous here.

> One new one that is a little interesting is "unknown_filter_type.png",
> in which I changed the filter type of the first row to 5. PngCheck
> doesn't seem to care, and the image displays in firefox but with some
> corruption. I haven't checked the libpng source to see what is going
> on.

pngcheck cares now.  (It won't currently detect that in anything but IDAT,
though.)

I'll append the full output.  There are still several formatting errors;
I'll get to those as time permits.

Greg

P.S.  No updates to pngsplit or png-fix-IDAT-windowsize.

% pngcheck -v brokensuite-20061201/*.png
File: brokensuite-20061201/bkgd_after_idat.png (2220 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 32-bit grayscale+alpha, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 2133
    zlib: deflated, 32K window, default compression
  chunk bKGD at offset 0x00896, length 2:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/bkgd_after_idat.png

File: brokensuite-20061201/chrm_after_idat.png (1514 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 1397
    zlib: deflated, 32K window, default compression
  chunk cHRM at offset 0x005b6, length 32:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/chrm_after_idat.png

File: brokensuite-20061201/chrm_after_plte.png (1554 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 738: 246 palette entries
  chunk cHRM at offset 0x00323, length 32:  must precede PLTE
ERRORS DETECTED in brokensuite-20061201/chrm_after_plte.png

File: brokensuite-20061201/chunk_crc.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  CRC error in chunk IHDR (computed 44a48ac6, expected 12345678)
ERRORS DETECTED in brokensuite-20061201/chunk_crc.png

File: brokensuite-20061201/chunk_length.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
:  invalid chunk length (too large)
ERRORS DETECTED in brokensuite-20061201/chunk_length.png

File: brokensuite-20061201/chunk_private_critical.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk GaMA at offset 0x00025, length 4:  private, critical chunk (warning)
  chunk PLTE at offset 0x00035, length 768: 256 palette entries
  chunk IDAT at offset 0x00341, length 433
    zlib: deflated, 32K window, default compression
  chunk IEND at offset 0x004fe, length 0
WARNINGS DETECTED in brokensuite-20061201/chunk_private_critical.png (5 chunks, -25.6% compression).

File: brokensuite-20061201/chunk_type.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  invalid chunk name "gaM_" (67 61 4d 5f)
ERRORS DETECTED in brokensuite-20061201/chunk_type.png

File: brokensuite-20061201/gama_after_idat.png (164 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 1-bit grayscale, non-interlaced
  chunk IDAT at offset 0x00025, length 91
    zlib: deflated, 32K window, default compression
  chunk gAMA at offset 0x0008c, length 4:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/gama_after_idat.png

File: brokensuite-20061201/gama_after_plte.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk PLTE at offset 0x00025, length 768: 256 palette entries
  chunk gAMA at offset 0x00331, length 4:  must precede PLTE
ERRORS DETECTED in brokensuite-20061201/gama_after_plte.png

File: brokensuite-20061201/gama_zero.png (1196 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4:  invalid value (0.0000)
ERRORS DETECTED in brokensuite-20061201/gama_zero.png

File: brokensuite-20061201/hist_after_idat.png (258 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk PLTE at offset 0x00044, length 45: 15 palette entries
  chunk IDAT at offset 0x0007d, length 71
    zlib: deflated, 32K window, default compression
  chunk hIST at offset 0x000d0, length 30:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/hist_after_idat.png

File: brokensuite-20061201/hist_before_plte.png (258 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk hIST at offset 0x00044, length 30:  must follow PLTE
ERRORS DETECTED in brokensuite-20061201/hist_before_plte.png

File: brokensuite-20061201/iccp_after_idat.png (418 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk IDAT at offset 0x00025, length 72
    zlib: deflated, 32K window, default compression
  chunk iCCP at offset 0x00079, length 277:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/iccp_after_idat.png

File: brokensuite-20061201/iccp_after_plte.png (519 bytes)
  chunk IHDR at offset 0x0000c, length 13
    48 x 48 image, 1-bit palette, non-interlaced
  chunk PLTE at offset 0x00025, length 3: 1 palette entry
  chunk iCCP at offset 0x00034, length 422:  must precede PLTE
ERRORS DETECTED in brokensuite-20061201/iccp_after_plte.png

File: brokensuite-20061201/ihdr_16bit_palette.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid sample depth (16) for palette image
ERRORS DETECTED in brokensuite-20061201/ihdr_16bit_palette.png

File: brokensuite-20061201/ihdr_1bit_alpha.png (184 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid sample depth (1) for RGB+alpha image
:  invalid compression method (1)
ERRORS DETECTED in brokensuite-20061201/ihdr_1bit_alpha.png

File: brokensuite-20061201/ihdr_bit_depth.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid sample depth (7)
ERRORS DETECTED in brokensuite-20061201/ihdr_bit_depth.png

File: brokensuite-20061201/ihdr_color_type.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid image type (1)
ERRORS DETECTED in brokensuite-20061201/ihdr_color_type.png

File: brokensuite-20061201/ihdr_compression_method.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid compression method (1)
ERRORS DETECTED in brokensuite-20061201/ihdr_compression_method.png

File: brokensuite-20061201/ihdr_filter_method.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid filter method (1)
ERRORS DETECTED in brokensuite-20061201/ihdr_filter_method.png

File: brokensuite-20061201/ihdr_image_size.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid image dimensions (-32x-32)
ERRORS DETECTED in brokensuite-20061201/ihdr_image_size.png

File: brokensuite-20061201/ihdr_interlace_method.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid interlace method (2)
ERRORS DETECTED in brokensuite-20061201/ihdr_interlace_method.png

File: brokensuite-20061201/itxt_compression_flag.png (1219 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk iTXt at offset 0x00025, length 27, keyword: Vegetable
:  invalid compression flag (2)
ERRORS DETECTED in brokensuite-20061201/itxt_compression_flag.png

File: brokensuite-20061201/itxt_compression_method.png (1227 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk iTXt at offset 0x00025, length 35, keyword: Vegetable
:  invalid compression method (1)
ERRORS DETECTED in brokensuite-20061201/itxt_compression_method.png

File: brokensuite-20061201/itxt_keyword_length.png (1210 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk iTXt at offset 0x00025, length 18:  zero length keyword
ERRORS DETECTED in brokensuite-20061201/itxt_keyword_length.png

File: brokensuite-20061201/itxt_keyword_length_2.png (1290 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk iTXt at offset 0x00025, length 98:   keyword is longer than 79 characters
ERRORS DETECTED in brokensuite-20061201/itxt_keyword_length_2.png

File: brokensuite-20061201/length_bkgd_gray.png (144 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 16-bit grayscale+alpha, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk bKGD at offset 0x00035, length 6:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_bkgd_gray.png

File: brokensuite-20061201/length_bkgd_palette.png (1133 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 519: 173 palette entries
  chunk tRNS at offset 0x00248, length 1: 1 transparency entry
  chunk bKGD at offset 0x00255, length 6:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_bkgd_palette.png

File: brokensuite-20061201/length_bkgd_rgb.png (198 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 32-bit RGB+alpha, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk bKGD at offset 0x00035, length 2:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_bkgd_rgb.png

File: brokensuite-20061201/length_chrm.png (1513 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk cHRM at offset 0x00035, length 31:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_chrm.png

File: brokensuite-20061201/length_gama.png (1285 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 3:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_gama.png

File: brokensuite-20061201/length_gifg.png (2376 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit palette, non-interlaced
  chunk gIFx at offset 0x00025, length 14
    application ID = NETSCAPE, authentication code = 0x322e30
    3 bytes of application data
  chunk tEXt at offset 0x0003f, length 201, keyword: Comment
  chunk PLTE at offset 0x00114, length 48: 16 palette entries
  chunk bKGD at offset 0x00150, length 1
    index = 0
  chunk gIFg at offset 0x0015d, length 5:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_gifg.png

File: brokensuite-20061201/length_hist.png (256 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk PLTE at offset 0x00044, length 45: 15 palette entries
  chunk hIST at offset 0x0007d, length 28:  invalid number of entries (14)
ERRORS DETECTED in brokensuite-20061201/length_hist.png

File: brokensuite-20061201/length_iend.png (1287 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 768: 256 palette entries
  chunk IDAT at offset 0x00341, length 433
    zlib: deflated, 32K window, default compression
  chunk IEND at offset 0x004fe, length 1:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_iend.png

File: brokensuite-20061201/length_ihdr.png (1287 bytes)
  chunk IHDR at offset 0x0000c, length 14:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_ihdr.png

File: brokensuite-20061201/length_offs.png (8623 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 8:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_offs.png

File: brokensuite-20061201/length_phys.png (723 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk pHYs at offset 0x00044, length 8:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_phys.png

File: brokensuite-20061201/length_sbit.png (147 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 2-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 4:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_sbit.png

File: brokensuite-20061201/length_sbit_2.png (179 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 1-bit grayscale, non-interlaced
  chunk sBIT at offset 0x00025, length 3:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_sbit_2.png

File: brokensuite-20061201/length_srgb.png (99 bytes)
  chunk IHDR at offset 0x0000c, length 13
    48 x 48 image, 1-bit palette, non-interlaced
  chunk sRGB at offset 0x00025, length 2:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_srgb.png

File: brokensuite-20061201/length_ster.png (1300 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk sTER at offset 0x00025, length 2:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_ster.png

File: brokensuite-20061201/length_time.png (291 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tIME at offset 0x00035, length 6:  invalid length
ERRORS DETECTED in brokensuite-20061201/length_time.png

File: brokensuite-20061201/length_trns_gray.png (417 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tRNS at offset 0x00035, length 0:  invalid length for grayscale image
ERRORS DETECTED in brokensuite-20061201/length_trns_gray.png

File: brokensuite-20061201/length_trns_palette.png (1301 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 519: 173 palette entries
  chunk tRNS at offset 0x00248, length 174:  invalid length for palette image
ERRORS DETECTED in brokensuite-20061201/length_trns_palette.png

File: brokensuite-20061201/length_trns_rgb.png (1341 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tRNS at offset 0x00035, length 0:  invalid length for RGB image
ERRORS DETECTED in brokensuite-20061201/length_trns_rgb.png

File: brokensuite-20061201/missing_idat.png (841 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 768: 256 palette entries
  chunk IEND at offset 0x00341, length 0:  no IDAT chunks
ERRORS DETECTED in brokensuite-20061201/missing_idat.png

File: brokensuite-20061201/missing_ihdr.png (1286 bytes)
  chunk gAMA at offset 0x0000c, length 4:  first chunk must be IHDR
ERRORS DETECTED in brokensuite-20061201/missing_ihdr.png

File: brokensuite-20061201/missing_plte.png (506 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 433:  must follow PLTE in palette image
ERRORS DETECTED in brokensuite-20061201/missing_plte.png

File: brokensuite-20061201/missing_plte_2.png (597 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tRNS at offset 0x00035, length 1:  must follow PLTE
ERRORS DETECTED in brokensuite-20061201/missing_plte_2.png

File: brokensuite-20061201/multiple_bkgd.png (2234 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 32-bit grayscale+alpha, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk bKGD at offset 0x00035, length 2
    gray = 0xab84
  chunk bKGD at offset 0x00043, length 2:  multiple bKGD not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_bkgd.png

File: brokensuite-20061201/multiple_chrm.png (1558 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk cHRM at offset 0x00035, length 32
    White x = 0.3127 y = 0.329,  Red x = 0.64 y = 0.33
    Green x = 0.3 y = 0.6,  Blue x = 0.15 y = 0.06
  chunk cHRM at offset 0x00061, length 32:  multiple cHRM not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_chrm.png

File: brokensuite-20061201/multiple_gama.png (1302 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk gAMA at offset 0x00035, length 4:  multiple gAMA not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_gama.png

File: brokensuite-20061201/multiple_hist.png (300 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk PLTE at offset 0x00044, length 45: 15 palette entries
  chunk hIST at offset 0x0007d, length 30: 15 histogram entries
  chunk hIST at offset 0x000a7, length 30:  multiple hIST not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_hist.png

File: brokensuite-20061201/multiple_iccp.png (953 bytes)
  chunk IHDR at offset 0x0000c, length 13
    48 x 48 image, 1-bit palette, non-interlaced
  chunk iCCP at offset 0x00025, length 422
    profile name = Gamma 1.0 profile, compression method = 0 (deflate)
    compressed profile = 403 bytes
  chunk iCCP at offset 0x001d7, length 422:  multiple iCCP not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_iccp.png

File: brokensuite-20061201/multiple_ihdr.png (1311 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk IHDR at offset 0x00025, length 13:  multiple IHDR not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_ihdr.png

File: brokensuite-20061201/multiple_offs.png (8645 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk oFFs at offset 0x0006c, length 9:  multiple oFFs not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_offs.png

File: brokensuite-20061201/multiple_pcal.png (8680 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk pCAL at offset 0x0006c, length 44: equation type 0
    physical_value = p0 + p1 * original_sample / (x1-x0)
    calibration name = bogus units
    physical_value unit name = foo/bar
    x0 = 0
    x1 = 65535
    p0 = 1.0e0
    p1 = 65.535e3
  chunk pCAL at offset 0x000a4, length 44:  multiple pCAL not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_pcal.png

File: brokensuite-20061201/multiple_phys.png (745 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk pHYs at offset 0x00044, length 9: 1000x1000 pixels/meter (25 dpi)
  chunk pHYs at offset 0x00059, length 9:  multiple pHYs not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_phys.png

File: brokensuite-20061201/multiple_plte.png (2066 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 768: 256 palette entries
  chunk PLTE at offset 0x00341, length 768:  multiple PLTE not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_plte.png

File: brokensuite-20061201/multiple_sbit.png (201 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05
  chunk sBIT at offset 0x00044, length 3:  multiple sBIT not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_sbit.png

File: brokensuite-20061201/multiple_scal.png (8674 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk pCAL at offset 0x0006c, length 44: equation type 0
    physical_value = p0 + p1 * original_sample / (x1-x0)
    calibration name = bogus units
    physical_value unit name = foo/bar
    x0 = 0
    x1 = 65535
    p0 = 1.0e0
    p1 = 65.535e3
  chunk sCAL at offset 0x000a4, length 38: image size 3.527777777778e-04 x 3.527777777778e-04 meters
  chunk sCAL at offset 0x000d6, length 38:  multiple sCAL not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_scal.png

File: brokensuite-20061201/multiple_srgb.png (111 bytes)
  chunk IHDR at offset 0x0000c, length 13
    48 x 48 image, 1-bit palette, non-interlaced
  chunk sRGB at offset 0x00025, length 1
    rendering intent = absolute colorimetric
  chunk sRGB at offset 0x00032, length 1:  multiple sRGB not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_srgb.png

File: brokensuite-20061201/multiple_ster.png (1312 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk sTER at offset 0x00025, length 1
    stereo subimage layout = cross-eyed
  chunk sTER at offset 0x00032, length 1:  multiple sTER not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_ster.png

File: brokensuite-20061201/multiple_time.png (311 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tIME at offset 0x00035, length 7:  1 Jan 2000 12:34:56 GMT
  chunk tIME at offset 0x00048, length 7:  multiple tIME not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_time.png

File: brokensuite-20061201/multiple_trns.png (433 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tRNS at offset 0x00035, length 2
    gray = 0x0007
  chunk tRNS at offset 0x00043, length 2:  multiple tRNS not allowed
ERRORS DETECTED in brokensuite-20061201/multiple_trns.png

File: brokensuite-20061201/nonconsecutive_idat.png (1743 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 768: 256 palette entries
  chunk IDAT at offset 0x00341, length 433
    zlib: deflated, 32K window, default compression
  chunk heRB at offset 0x004fe, length 0
    unknown private, ancillary, unsafe-to-copy chunk
  chunk IDAT at offset 0x0050a, length 433:  IDAT chunks must be consecutive
ERRORS DETECTED in brokensuite-20061201/nonconsecutive_idat.png

File: brokensuite-20061201/offs_after_idat.png (8624 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk IDAT at offset 0x00057, length 8119
    zlib: deflated, 32K window, default compression
  chunk pCAL at offset 0x0201a, length 44:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/offs_after_idat.png

File: brokensuite-20061201/offs_unit_specifier.png (8624 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9:  invalid unit specifier (2)
ERRORS DETECTED in brokensuite-20061201/offs_unit_specifier.png

File: brokensuite-20061201/pcal_after_idat.png (8624 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk IDAT at offset 0x0006c, length 8119
    zlib: deflated, 32K window, default compression
  chunk sCAL at offset 0x0202f, length 38:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/pcal_after_idat.png

File: brokensuite-20061201/phys_after_idat.png (724 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk IDAT at offset 0x00044, length 615
    zlib: deflated, 32K window, default compression
  chunk pHYs at offset 0x002b7, length 9:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/phys_after_idat.png

File: brokensuite-20061201/phys_unit_specifier.png (724 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk pHYs at offset 0x00044, length 9:  invalid unit specifier (2)
ERRORS DETECTED in brokensuite-20061201/phys_unit_specifier.png

File: brokensuite-20061201/plte_after_idat.png (1286 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 433:  must follow PLTE in palette image
ERRORS DETECTED in brokensuite-20061201/plte_after_idat.png

File: brokensuite-20061201/plte_empty.png (518 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 0:  invalid number of entries (0)
ERRORS DETECTED in brokensuite-20061201/plte_empty.png

File: brokensuite-20061201/plte_in_grayscale.png (153 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 3:  PLTE not allowed in grayscale image
ERRORS DETECTED in brokensuite-20061201/plte_in_grayscale.png

File: brokensuite-20061201/plte_length_mod_three.png (520 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 2:  invalid number of entries (0.666667)
ERRORS DETECTED in brokensuite-20061201/plte_length_mod_three.png

File: brokensuite-20061201/plte_too_many_entries.png (222 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3
    red = 4 = 0x04, green = 4 = 0x04, blue = 4 = 0x04
  chunk PLTE at offset 0x00044, length 51:  invalid number of entries (17) for 4-bit image
ERRORS DETECTED in brokensuite-20061201/plte_too_many_entries.png

File: brokensuite-20061201/plte_too_many_entries_2.png (928 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 771:  invalid number of entries (257)
ERRORS DETECTED in brokensuite-20061201/plte_too_many_entries_2.png

File: brokensuite-20061201/sbit_after_idat.png (186 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 98
    zlib: deflated, 32K window, default compression
  chunk sBIT at offset 0x000a3, length 3:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/sbit_after_idat.png

File: brokensuite-20061201/sbit_after_plte.png (146 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 2-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 12: 4 palette entries
  chunk sBIT at offset 0x0004d, length 3:  must precede PLTE
ERRORS DETECTED in brokensuite-20061201/sbit_after_plte.png

File: brokensuite-20061201/sbit_sample_depth.png (186 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3:  255 red bits invalid for 8-bit/sample image
ERRORS DETECTED in brokensuite-20061201/sbit_sample_depth.png

File: brokensuite-20061201/sbit_sample_depth_2.png (186 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk sBIT at offset 0x00035, length 3:  9 red bits invalid for 8-bit/sample image
ERRORS DETECTED in brokensuite-20061201/sbit_sample_depth_2.png

File: brokensuite-20061201/scal_after_idat.png (8624 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk pCAL at offset 0x0006c, length 44: equation type 0
    physical_value = p0 + p1 * original_sample / (x1-x0)
    calibration name = bogus units
    physical_value unit name = foo/bar
    x0 = 0
    x1 = 65535
    p0 = 1.0e0
    p1 = 65.535e3
  chunk IDAT at offset 0x000a4, length 8119
    zlib: deflated, 32K window, default compression
  chunk pHYs at offset 0x02067, length 9:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/scal_after_idat.png

File: brokensuite-20061201/scal_floating_point.png (8624 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk pCAL at offset 0x0006c, length 44: equation type 0
    physical_value = p0 + p1 * original_sample / (x1-x0)
    calibration name = bogus units
    physical_value unit name = foo/bar
    x0 = 0
    x1 = 65535
    p0 = 1.0e0
    p1 = 65.535e3
  chunk sCAL at offset 0x000a4, length 38:  invalid character ('Q' = 0x51)
ERRORS DETECTED in brokensuite-20061201/scal_floating_point.png

File: brokensuite-20061201/scal_unit_specifier.png (8624 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk pCAL at offset 0x0006c, length 44: equation type 0
    physical_value = p0 + p1 * original_sample / (x1-x0)
    calibration name = bogus units
    physical_value unit name = foo/bar
    x0 = 0
    x1 = 65535
    p0 = 1.0e0
    p1 = 65.535e3
  chunk sCAL at offset 0x000a4, length 38:  invalid unit specifier (3)
ERRORS DETECTED in brokensuite-20061201/scal_unit_specifier.png

File: brokensuite-20061201/splt_after_idat.png (2484 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 48-bit RGB, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 229
    zlib: deflated, 32K window, default compression
  chunk sPLT at offset 0x00126, length 2170:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/splt_after_idat.png

File: brokensuite-20061201/splt_duplicate_name.png (1330 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk sPLT at offset 0x00025, length 10: 0 palette/histogram entries
    sample depth = 8 bits, palette name = Lemonade
  chunk sPLT at offset 0x0003b, length 10: 0 palette/histogram entries
    sample depth = 8 bits, palette name = Lemonade
  chunk gAMA at offset 0x00051, length 4: 1.0000
  chunk PLTE at offset 0x00061, length 768: 256 palette entries
  chunk IDAT at offset 0x0036d, length 433
    zlib: deflated, 32K window, default compression
  chunk IEND at offset 0x0052a, length 0
No errors detected in brokensuite-20061201/splt_duplicate_name.png (7 chunks, -29.9% compression).

File: brokensuite-20061201/splt_length_mod_10.png (1320 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk sPLT at offset 0x00025, length 22:  invalid number of entries (0.6)
ERRORS DETECTED in brokensuite-20061201/splt_length_mod_10.png

File: brokensuite-20061201/splt_length_mod_6.png (1324 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk sPLT at offset 0x00025, length 26:  invalid number of entries (1.66667)
ERRORS DETECTED in brokensuite-20061201/splt_length_mod_6.png

File: brokensuite-20061201/splt_sample_depth.png (1314 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk sPLT at offset 0x00025, length 16:  invalid sample depth (4 bits)
ERRORS DETECTED in brokensuite-20061201/splt_sample_depth.png

File: brokensuite-20061201/srgb_after_idat.png (142 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 24-bit RGB, non-interlaced
  chunk IDAT at offset 0x00025, length 72
    zlib: deflated, 32K window, default compression
  chunk sRGB at offset 0x00079, length 1:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/srgb_after_idat.png

File: brokensuite-20061201/srgb_after_plte.png (98 bytes)
  chunk IHDR at offset 0x0000c, length 13
    48 x 48 image, 1-bit palette, non-interlaced
  chunk PLTE at offset 0x00025, length 3: 1 palette entry
  chunk sRGB at offset 0x00034, length 1:  must precede PLTE
ERRORS DETECTED in brokensuite-20061201/srgb_after_plte.png

File: brokensuite-20061201/ster_after_idat.png (1299 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 768: 256 palette entries
  chunk IDAT at offset 0x00341, length 433
    zlib: deflated, 32K window, default compression
  chunk sTER at offset 0x004fe, length 1:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/ster_after_idat.png

File: brokensuite-20061201/ster_mode.png (1299 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk sTER at offset 0x00025, length 1:  invalid layout mode
ERRORS DETECTED in brokensuite-20061201/ster_mode.png

File: brokensuite-20061201/time_value_range.png (292 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tIME at offset 0x00035, length 7:  invalid month (0)
ERRORS DETECTED in brokensuite-20061201/time_value_range.png

File: brokensuite-20061201/trns_after_idat.png (419 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk bKGD at offset 0x00035, length 2
    gray = 0x0000
  chunk IDAT at offset 0x00043, length 318
    zlib: deflated, 32K window, default compression
  chunk tRNS at offset 0x0018d, length 2:  must precede IDAT
ERRORS DETECTED in brokensuite-20061201/trns_after_idat.png

File: brokensuite-20061201/trns_bad_color_type.png (198 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 32-bit RGB+alpha, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tRNS at offset 0x00035, length 2:  not allowed in RGB+alpha image
ERRORS DETECTED in brokensuite-20061201/trns_bad_color_type.png

File: brokensuite-20061201/trns_too_many_entries.png (1314 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 519: 173 palette entries
  chunk tRNS at offset 0x00248, length 200:  invalid length for palette image
ERRORS DETECTED in brokensuite-20061201/trns_too_many_entries.png

File: brokensuite-20061201/truncate_idat_0.png (81 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 1-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 8
    zlib: deflated, 32K window, default compression
  chunk IEND at offset 0x00049, length 0:  not enough IDAT data
ERRORS DETECTED in brokensuite-20061201/truncate_idat_0.png

File: brokensuite-20061201/truncate_idat_1.png (82 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 1-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 9
    zlib: deflated, 32K window, default compression
  chunk IEND at offset 0x0004a, length 0:  not enough IDAT data
ERRORS DETECTED in brokensuite-20061201/truncate_idat_1.png

File: brokensuite-20061201/truncate_zlib.png (861 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 8-bit palette, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk PLTE at offset 0x00035, length 768: 256 palette entries
  chunk IDAT at offset 0x00341, length 433:  EOF while reading data
ERRORS DETECTED in brokensuite-20061201/truncate_zlib.png

File: brokensuite-20061201/truncate_zlib_2.png (6283 bytes)
  chunk IHDR at offset 0x0000c, length 13
    91 x 69 image, 32-bit RGB+alpha, interlaced
  chunk gAMA at offset 0x00025, length 4: 0.45455
  chunk sBIT at offset 0x00035, length 4
    red = 5 = 0x05, green = 5 = 0x05, blue = 5 = 0x05, alpha = 5 = 0x05
  chunk bKGD at offset 0x00045, length 6
    red = 0x00e0, green = 0x00e0, blue = 0x0080
  chunk oFFs at offset 0x00057, length 9: 0x0 micrometers offset
  chunk pCAL at offset 0x0006c, length 44: equation type 0
    physical_value = p0 + p1 * original_sample / (x1-x0)
    calibration name = bogus units
    physical_value unit name = foo/bar
    x0 = 0
    x1 = 65535
    p0 = 1.0e0
    p1 = 65.535e3
  chunk sCAL at offset 0x000a4, length 38: image size 3.527777777778e-04 x 3.527777777778e-04 meters
  chunk pHYs at offset 0x000d6, length 9: 2835x2835 pixels/meter (72 dpi)
  chunk tIME at offset 0x000eb, length 7:  7 Jun 1996 17:58:08 GMT
  chunk tEXt at offset 0x000fe, length 9, keyword: Title
  chunk IDAT at offset 0x00113, length 8119:  EOF while reading data
ERRORS DETECTED in brokensuite-20061201/truncate_zlib_2.png

File: brokensuite-20061201/unknown_filter_type.png (167 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 1-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk IDAT at offset 0x00035, length 94
    zlib: deflated, 32K window, default compression
    invalid row-filter type (5)
ERRORS DETECTED in brokensuite-20061201/unknown_filter_type.png

File: brokensuite-20061201/x00n0g01.png (49 bytes)
  chunk IHDR at offset 0x0000c, length 13:  invalid image dimensions (0x0)
ERRORS DETECTED in brokensuite-20061201/x00n0g01.png

File: brokensuite-20061201/xcrn0g04.png (261 bytes)
  File is CORRUPTED.  It seems to have suffered Unix->DOS conversion.
ERRORS DETECTED in brokensuite-20061201/xcrn0g04.png

File: brokensuite-20061201/xlfn0g04.png (240 bytes)
  File is CORRUPTED.  It seems to have suffered DOS->Unix conversion.
ERRORS DETECTED in brokensuite-20061201/xlfn0g04.png

File: brokensuite-20061201/ztxt_compression_method.png (753 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tEXt at offset 0x00035, length 14, keyword: Title
  chunk tEXt at offset 0x0004f, length 49, keyword: Author
  chunk zTXt at offset 0x0008c, length 65:  invalid compression method (3)
ERRORS DETECTED in brokensuite-20061201/ztxt_compression_method.png

File: brokensuite-20061201/ztxt_data_format.png (753 bytes)
  chunk IHDR at offset 0x0000c, length 13
    32 x 32 image, 4-bit grayscale, non-interlaced
  chunk gAMA at offset 0x00025, length 4: 1.0000
  chunk tEXt at offset 0x00035, length 14, keyword: Title
  chunk tEXt at offset 0x0004f, length 49, keyword: Author
  chunk zTXt at offset 0x0008c, length 65, keyword: Copyright
  chunk zTXt at offset 0x000d9, length 187, keyword: Description
  chunk zTXt at offset 0x001a0, length 64, keyword: Software
  chunk zTXt at offset 0x001ec, length 29, keyword: Disclaimer
  chunk IDAT at offset 0x00215, length 200
    zlib: deflated, 32K window, default compression
  chunk IEND at offset 0x002e9, length 0
No errors detected in brokensuite-20061201/ztxt_data_format.png (10 chunks, -47.1% compression).

Errors were detected in 104 of the 107 files tested.
Warnings were detected in 1 of the 107 files tested.
No errors were detected in 2 of the 107 files tested.