[cairo] segmentation fault during poppler_page_render()

[Dan Raymond]

Here is more GDB info showing the faulting instruction, the contents of 
the bad pointer, and the full backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x68fe680d in _fill_xrgb32_lerp_opaque_spans ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
(gdb) x/i $pc
=> 0x68fe680d <_fill_xrgb32_lerp_opaque_spans+281>: mov    (%eax),%ecx
(gdb) info registers
eax            0x30b5000        51073024
ecx            0x0      0
edx            0xfff57b52       -689326
ebx            0x165    357
esp            0x28d960 0x28d960
ebp            0x28d9c8 0x28d9c8
esi            0x194    404
edi            0x28da80 2677376
eip            0x68fe680d       0x68fe680d 
<_fill_xrgb32_lerp_opaque_spans+281>
eflags         0x10286  [ PF SF IF RF ]
cs             0x23     35
ss             0x2b     43
ds             0x2b     43
es             0x2b     43
fs             0x53     83
gs             0x2b     43
(gdb) bt
#0  0x68fe680d in _fill_xrgb32_lerp_opaque_spans ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#1  0x69038015 in blit_a8 () from C:\msys2\usr\local\bin\libcairo-2.dll
#2  0x69038593 in glitter_scan_converter_render ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#3  0x6903872e in _cairo_tor_scan_converter_generate ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#4  0x690279ae in composite_polygon ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#5  0x69027e5b in clip_and_composite_polygon ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#6  0x690281fc in _cairo_spans_compositor_stroke ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#7  0x68fd7386 in _cairo_compositor_stroke ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#8  0x68fecf54 in _cairo_image_surface_stroke ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#9  0x6902cb09 in _cairo_surface_stroke ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#10 0x68fdfdad in _cairo_gstate_stroke ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#11 0x68fda87c in _cairo_default_context_stroke ()
    from C:\msys2\usr\local\bin\libcairo-2.dll
#12 0x68fd0d04 in cairo_stroke () from C:\msys2\usr\local\bin\libcairo-2.dll
#13 0x6cc1b143 in CairoOutputDev::stroke (this=0x289e5d8, state=0x30e6ea8)
     at CairoOutputDev.cc:783
#14 0x008764ff in Gfx::opStroke (this=0x31079c0, args=0x28fa80, numArgs=0)
     at Gfx.cc:1856
#15 0x0086a599 in Gfx::execOp (this=this at entry=0x31079c0,
     cmd=cmd at entry=0x28fa58, args=args at entry=0x28fa80, 
numArgs=numArgs at entry=0)
     at Gfx.cc:904
#16 0x00872c3f in Gfx::go (this=this at entry=0x31079c0,
     topLevel=topLevel at entry=true) at Gfx.cc:763
#17 0x0087312e in Gfx::display (this=0x31079c0, obj=0x28fd80, topLevel=true)
     at Gfx.cc:729
#18 0x008b5849 in Page::displaySlice (this=0x289fda8, out=0x289e5d8, 
hDPI=72,
     vDPI=72, rotate=0, useMediaBox=false, crop=true, sliceX=-1, sliceY=-1,
     sliceW=-1, sliceH=-1, printing=false, abortCheckCbk=0x0,
     abortCheckCbkData=0x0, annotDisplayDecideCbk=0x0,
     annotDisplayDecideCbkData=0x0, copyXRef=false) at Page.cc:585
#19 0x6cc07e67 in _poppler_page_render (page=0x2867020, cairo=0x28d4fe8,
     printing=<optimized out>, print_flags=POPPLER_PRINT_DOCUMENT)
     at poppler-page.cc:362
#20 0x00401840 in main ()