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Segfault in matplotlib.tests.test_image:test_get_window_extent_for_AxisImage on python3.5 #5429

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jenshnielsen opened this issue Nov 7, 2015 · 3 comments
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Segfault in matplotlib.tests.test_image:test_get_window_extent_for_AxisImage on python3.5 #5429

jenshnielsen opened this issue Nov 7, 2015 · 3 comments
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On master here: https://travis-ci.org/matplotlib/matplotlib/jobs/89776539

Unfortunately this is not caught because we use the nose multiprocessing plugin just skips the test
@jenshnielsen jenshnielsen mentioned this issue Nov 7, 2015
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It seems to be due to the test calling
fig.canvas.draw() within a nose test.

I.e. running the tests as a script does not trigger the segfault

@tacaswell tacaswell added this to the proposed next point release (2.1) milestone Nov 7, 2015
@mdboom mdboom self-assigned this Nov 7, 2015
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mdboom commented Nov 7, 2015

Traceback makes me think it's related to #5361

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mdboom commented Nov 7, 2015 

#0  agg::pixfmt_alpha_blend_rgba<fixed_blender_rgba_plain<agg::rgba8T<agg::linear>, agg::order_rgba>, agg::row_accessor<unsigned char> >::blend_solid_hspan (this=this@entry=0x177a4d8, 
    x=x@entry=0, y=y@entry=991, len=<optimized out>, len@entry=4294967291, c=..., covers=0x1802000 <error: Cannot access memory at address 0x1802000>)
    at extern/agg24-svn/include/agg_pixfmt_rgba.h:1859
#1  0x00007fffe4e44d75 in agg::pixfmt_alpha_blend_rgba<fixed_blender_rgba_plain<agg::rgba8T<agg::linear>, agg::order_rgba>, agg::row_accessor<unsigned char> >::blend_solid_hspan (
    covers=<optimized out>, c=..., len=<optimized out>, y=991, x=0, this=0x177a4d8) at extern/agg24-svn/include/agg_pixfmt_rgba.h:1854
#2  RendererAgg::draw_text_image<numpy::array_view<unsigned char, 2> > (this=0x177a390, gc=..., image=..., x=<optimized out>, y=1006, angle=<optimized out>) at src/_backend_agg.h:792
#3  0x00007fffe4e3382e in PyRendererAgg_draw_text_image (self=0x7fffe7de9390, args=<optimized out>, kwds=<optimized out>) at src/_backend_agg_wrapper.cpp:240
#4  0x0000000000599cf9 in PyCFunction_Call (func=func@entry=0x7fffe7d59438, args=args@entry=0x7fffe7dc3e60, kwds=kwds@entry=0x0) at Objects/methodobject.c:109

@mdboom mdboom mentioned this issue Nov 7, 2015
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