[Pcb-bugs] [Bug 1048256] Re: pcb crashes when GUI-lessly exporting a PNG

[Amit D. <mec...@gm...>]

Some amateur research below:

-- Segfaults since bounding box returns null within png_do_export [line 841: bbox = GetDataBoundingBox (PCB->Data);]
-- GetDataBoundingBox returns null since layout has not Data (no Vias, no elements, etc.)

Solution might be to check if bounding box returns NULL and exit with an
error. Patch attached.

** Patch added: "0001-hid-png-Error-out-when-layout-contains-no-data.patch"
   https://bugs.launchpad.net/pcb/+bug/1048256/+attachment/3466869/+files/0001-hid-png-Error-out-when-layout-contains-no-data.patch

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https://bugs.launchpad.net/bugs/1048256

Title:
  pcb crashes when GUI-lessly exporting a PNG

Status in PCB: Printed Circuit Board CAD package:
  Confirmed

Bug description:
  When working on bug #1045907 (pcbdiff related) I found pcb crashing on
  this:

    pcb -x png --dpi 200 --only-visible --photo-mode --outfile /tmp/bla
  PCB.00020492.backup

  The same happens when using the pcb coming with Ubuntu 12.04 (PCB
  version 20110918) as well as with a binary compiled from current git,
  using src/pcbtest.sh. The layout is apparently empty.

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