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Re: [matplotlib-devel] [Python-modules-team] Bug#585442: python-matplotlib: crashes when calling axis() after imshow()
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From: Michael D. <md...@st...> - 2010-06-22 16:26:47
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Hold off, actually. This patch seems to have broken some thing inadvertently. Stay tuned... Mike On 06/22/2010 12:05 PM, Michael Droettboom wrote: > In r8454, I have a applied a fix that allows this C++ exception to > correctly percolate to the Python side -- the user will still get an > exception, but it will be a Python exception and the interpreter > itself does not crash. (It used to work, but recent changes to CXX > caused it to break.) I have attached this patch to the e-mail. > > As Eric suggests, fixing the underlying limitation (I even hesitate to > call it a bug because it is definitely a corner case) requires > understanding some pretty dark depths of the Agg renderer. > > Mike > > On 06/21/2010 10:57 PM, Eric Firing wrote: >> On 06/21/2010 12:24 PM, Sandro Tosi wrote: >>> forwarded 585442 mat...@li... >>> thanks >>> >>> Hello Matplotlib developers, >>> here below is a report a user of maplotlib sent to the Debian bug >>> tracker. I've verified and it happend also with 0.99.3: >>> >>> $ python -c "import matplotlib as p ; print p.__version__" >>> 0.99.3 >>> $ python mpl_crash.py >>> terminate called after throwing an instance of 'char const*' >>> Aborted >>> >>> Thanks for looking into it, >>> Sandro >> Sandro, >> >> Thanks for reporting it. >> >> With the default interpolation, rendering gets extremely slow as the >> view limits decline to and below a single image pixel. I suspect the >> crash is related to this. Neither the slowdown nor the crash occurs >> with interpolation='nearest', although there is still an anomaly in >> which the image is blank when the viewlim region is too small. >> >> Like Ryan, I am not familiar with the _image.cpp and the underlying agg >> routines, but I suspect this is going to be a difficult problem to >> solve. It may be necessary to put in some workaround, trying to trap >> and prevent the extreme slowdown and crash. The slowdown topic came up >> on the list years ago. >> >> http://www.mail-archive.com/mat...@li.../msg00513.html >> >> >> Eric >> >>> On Thu, Jun 10, 2010 at 16:52, Teemu Ikonen<tpi...@gm...> >>> wrote: >>>> Package: python-matplotlib >>>> Version: 0.99.1.2-3 >>>> Severity: important >>>> >>>> Running a program which displays an image with plt.imshow() and >>>> changes the >>>> axes with plt.axis() before calling plt.show() crashes the python >>>> interpreter: >>>> >>>> $ python mpl_crash.py >>>> terminate called after throwing an instance of 'char const*' >>>> Aborted >>>> >>>> This happens at least with Qt4Agg, GTKAgg and TKAgg backends. >>>> >>>> The example program is attached. >>>> >>>> Best, >>>> >>>> Teemu >>>> >>>> -- System Information: >>>> Debian Release: squeeze/sid >>>> APT prefers testing >>>> APT policy: (500, 'testing') >>>> Architecture: amd64 (x86_64) >>>> >>>> Kernel: Linux 2.6.32-trunk-amd64 (SMP w/4 CPU cores) >>>> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) >>>> Shell: /bin/sh linked to /bin/dash >>>> >>>> Versions of packages python-matplotlib depends on: >>>> ii libatk1.0-0 1.30.0-1 The ATK accessibility >>>> toolkit >>>> ii libc6 2.10.2-9 Embedded GNU C >>>> Library: Shared lib >>>> ii libcairo2 1.8.10-4 The Cairo 2D vector >>>> graphics libra >>>> ii libfontconfig1 2.8.0-2.1 generic font >>>> configuration library >>>> ii libfreetype6 2.3.11-1 FreeType 2 font >>>> engine, shared lib >>>> ii libgcc1 1:4.4.4-1 GCC support library >>>> ii libglib2.0-0 2.24.1-1 The GLib library of C >>>> routines >>>> ii libgtk2.0-0 2.20.1-1 The GTK+ graphical >>>> user interface >>>> ii libpango1.0-0 1.28.0-1 Layout and rendering >>>> of internatio >>>> ii libpng12-0 1.2.43-1 PNG library - runtime >>>> ii libstdc++6 4.4.4-1 The GNU Standard C++ >>>> Library v3 >>>> ii python 2.5.4-9 An interactive >>>> high-level object-o >>>> ii python-cairo 1.8.8-1+b1 Python bindings for >>>> the Cairo vect >>>> ii python-dateutil 1.4.1-3 powerful extensions to >>>> the standar >>>> ii python-gobject 2.21.1-1 Python bindings for >>>> the GObject li >>>> ii python-matplotlib-data 0.99.1.2-3 Python based plotting >>>> system (data >>>> ii python-numpy 1:1.3.0-3+b1 Numerical Python adds >>>> a fast array >>>> ii python-pyparsing 1.5.2-2 Python parsing module >>>> ii python-support 1.0.8 automated rebuilding >>>> support for P >>>> ii python-tz 2010b-1 Python version of the >>>> Olson timezo >>>> ii tcl8.5 8.5.8-2 Tcl (the Tool Command >>>> Language) v8 >>>> ii tk8.5 8.5.8-1 Tk toolkit for Tcl and >>>> X11, v8.5 - >>>> ii zlib1g 1:1.2.3.4.dfsg-3 compression library - >>>> runtime >>>> >>>> Versions of packages python-matplotlib recommends: >>>> ii python-glade2 2.17.0-2 GTK+ bindings: Glade >>>> support >>>> ii python-tk 2.6.5-1 Tkinter - Writing Tk >>>> applications >>>> >>>> Versions of packages python-matplotlib suggests: >>>> ii dvipng 1.13-1 convert DVI files to >>>> PNG graphics >>>> ii ipython 0.10-2 enhanced interactive >>>> Python shell >>>> ii librsvg2-common 2.26.3-1 SAX-based renderer >>>> library for SVG >>>> ii python-configobj 4.7.2+ds-1 simple but powerful >>>> config file re >>>> pn python-excelerator<none> (no description available) >>>> ii python-gtk2 2.17.0-2 Python bindings for >>>> the GTK+ widge >>>> pn python-matplotlib-doc<none> (no description available) >>>> pn python-qt3<none> (no description available) >>>> ii python-qt4 4.7.3-1 Python bindings for Qt4 >>>> ii python-scipy 0.7.2-1 scientific tools for >>>> Python >>>> ii python-traits 3.3.0-1 Manifest typing and >>>> reactive progr >>>> ii python-wxgtk2.8 2.8.10.1-3 wxWidgets >>>> Cross-platform C++ GUI t >>>> ii texlive-extra-utils 2009-7 TeX Live: TeX >>>> auxiliary programs >>>> ii texlive-latex-extra 2009-7 TeX Live: LaTeX >>>> supplementary pack >>>> >>>> -- no debconf information >>>> >>>> _______________________________________________ >>>> Python-modules-team mailing list >>>> Pyt...@li... >>>> http://lists.alioth.debian.org/mailman/listinfo/python-modules-team >>>> >>> >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> >>> ThinkGeek and WIRED's GeekDad team up for the Ultimate >>> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the >>> lucky parental unit. See the prize list and enter to win: >>> http://p.sf.net/sfu/thinkgeek-promo >>> >>> >>> >>> _______________________________________________ >>> Matplotlib-devel mailing list >>> Mat...@li... >>> https://lists.sourceforge.net/lists/listinfo/matplotlib-devel >> >> ------------------------------------------------------------------------------ >> >> ThinkGeek and WIRED's GeekDad team up for the Ultimate >> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the >> lucky parental unit. See the prize list and enter to win: >> http://p.sf.net/sfu/thinkgeek-promo >> _______________________________________________ >> Matplotlib-devel mailing list >> Mat...@li... >> https://lists.sourceforge.net/lists/listinfo/matplotlib-devel > > > > ------------------------------------------------------------------------------ > ThinkGeek and WIRED's GeekDad team up for the Ultimate > GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the > lucky parental unit. See the prize list and enter to win: > http://p.sf.net/sfu/thinkgeek-promo > > > _______________________________________________ > Matplotlib-devel mailing list > Mat...@li... > https://lists.sourceforge.net/lists/listinfo/matplotlib-devel > -- Michael Droettboom Science Software Branch Space Telescope Science Institute Baltimore, Maryland, USA |
