#0  0x00007ffff4b38fa5 in raise () from /usr/lib/libc.so.6
#1  0x00007ffff4b3a428 in abort () from /usr/lib/libc.so.6
#2  0x00007ffff4b32002 in __assert_fail_base () from /usr/lib/libc.so.6
#3  0x00007ffff4b320b2 in __assert_fail () from /usr/lib/libc.so.6
#4  0x00007fffd9995cab in GfxGouraudTriangleShading::getTriangle (this=
    0x7fffc0680100, i=<optimized out>, x0=<optimized out>, y0=<optimized out>, 
    color0=<optimized out>, x1=0x7fffda4ce5d0, y1=0x7fffda4ce5d8, color1=
    0x7fffda4ce6a0, x2=0x7fffda4ce5e0, y2=0x7fffda4ce5e8, color2=
    0x7fffda4ce720) at GfxState.cc:4159
#5  0x00007fffe45e3338 in CairoOutputDev::gouraudTriangleShadedFill (this=
    0x7fffc0042070, state=0x7fffc068a4f0, shading=0x7fffc0680100)
    at CairoOutputDev.cc:951
#6  0x00007fffd99759ea in Gfx::doGouraudTriangleShFill (this=this@entry=
    0x7fffc0689fe0, shading=shading@entry=0x7fffc0680100) at Gfx.cc:3249
#7  0x00007fffd9977543 in Gfx::opShFill (this=0x7fffc0689fe0, 
    args=<optimized out>, numArgs=<optimized out>) at Gfx.cc:2419
#8  0x00007fffd9970208 in Gfx::execOp (this=this@entry=0x7fffc0689fe0, 
    cmd=cmd@entry=0x7fffda4ceb10, args=args@entry=0x7fffda4ceb50, 
    numArgs=numArgs@entry=1) at Gfx.cc:857
#9  0x00007fffd9978495 in Gfx::go (this=this@entry=0x7fffc0689fe0, 
    topLevel=topLevel@entry=false) at Gfx.cc:716
#10 0x00007fffd9978911 in Gfx::display (this=this@entry=0x7fffc0689fe0, 
    obj=obj@entry=0x7fffda4cefd0, topLevel=topLevel@entry=false) at Gfx.cc:682
#11 0x00007fffd9978c83 in Gfx::drawForm (this=this@entry=0x7fffc0689fe0, 
    str=str@entry=0x7fffda4cefd0, resDict=<optimized out>, matrix=matrix@entry=
    0x7fffda4cef10, bbox=bbox@entry=0x7fffda4ceef0, 
    transpGroup=transpGroup@entry=true, softMask=softMask@entry=true, 
    blendingColorSpace=blendingColorSpace@entry=0x7fffc0186880, 
    isolated=isolated@entry=false, knockout=knockout@entry=false, 
    alpha=alpha@entry=false, transferFunc=transferFunc@entry=0x0, 
    backdropColor=backdropColor@entry=0x7fffda4cf080) at Gfx.cc:4830
#12 0x00007fffd997d3d6 in Gfx::doSoftMask (this=this@entry=0x7fffc0689fe0, 
    str=str@entry=0x7fffda4cefd0, alpha=alpha@entry=false, 
    blendingColorSpace=blendingColorSpace@entry=0x7fffc0186880, 
    isolated=isolated@entry=false, knockout=knockout@entry=false, transferFunc=
    0x0, backdropColor=backdropColor@entry=0x7fffda4cf080) at Gfx.cc:1368
#13 0x00007fffd997e7ca in Gfx::opSetExtGState (this=0x7fffc0689fe0, args=
    0x7fffda4cf210, numArgs=<optimized out>) at Gfx.cc:1212
#14 0x00007fffd9970208 in Gfx::execOp (this=this@entry=0x7fffc0689fe0, 
    cmd=cmd@entry=0x7fffda4cf1d0, args=args@entry=0x7fffda4cf210, 
    numArgs=numArgs@entry=1) at Gfx.cc:857
#15 0x00007fffd9978495 in Gfx::go (this=this@entry=0x7fffc0689fe0, 
    topLevel=topLevel@entry=true) at Gfx.cc:716
#16 0x00007fffd9978911 in Gfx::display (this=0x7fffc0689fe0, obj=
    0x7fffc06ec808, topLevel=true) at Gfx.cc:682
#17 0x00007fffe45e4857 in CairoOutputDev::tilingPatternFill (this=
    0x7fffc0042070, state=0x7fffc06885f0, gfx1=<optimized out>, 
    cat=<optimized out>, str=0x7fffc06ec808, pmat=<optimized out>, paintType=
    1, resDict=0x7fffc01c0030, mat=0x7fffda4cf650, bbox=0x7fffc06ec798, x0=-1, 
    y0=-1, x1=1, y1=1, xStep=<optimized out>, yStep=<optimized out>)
    at CairoOutputDev.cc:847
#18 0x00007fffd997a94e in Gfx::doTilingPatternFill (this=this@entry=
    0x7fffc01cef30, tPat=0x7fffc06ec780, stroke=stroke@entry=false, 
    eoFill=eoFill@entry=true, text=text@entry=false) at Gfx.cc:2218
#19 0x00007fffd997cb91 in Gfx::doPatternFill (this=this@entry=0x7fffc01cef30, 
    eoFill=eoFill@entry=true) at Gfx.cc:1965
#20 0x00007fffd997cf32 in Gfx::opEOFill (this=0x7fffc01cef30, 
    args=<optimized out>, numArgs=<optimized out>) at Gfx.cc:1851
#21 0x00007fffd9970208 in Gfx::execOp (this=this@entry=0x7fffc01cef30, 
    cmd=cmd@entry=0x7fffda4cf800, args=args@entry=0x7fffda4cf840, 
    numArgs=numArgs@entry=0) at Gfx.cc:857
#22 0x00007fffd9978495 in Gfx::go (this=this@entry=0x7fffc01cef30, 
    topLevel=topLevel@entry=true) at Gfx.cc:716
#23 0x00007fffd9978911 in Gfx::display (this=0x7fffc01cef30, obj=
    0x7fffda4cfb30, topLevel=true) at Gfx.cc:682
#24 0x00007fffd99b8d58 in Page::displaySlice (this=0x7fffc00c6bc0, out=
    0x7fffc0042070, hDPI=72, vDPI=72, rotate=0, useMediaBox=false, crop=true, 
    sliceX=<optimized out>, sliceY=-1, sliceW=-1, sliceH=-1, printing=false, 
    abortCheckCbk=0x0, abortCheckCbkData=0x0, annotDisplayDecideCbk=0x0, 
    annotDisplayDecideCbkData=0x0) at Page.cc:519
#25 0x00007fffe45d9d2a in _poppler_page_render (page=page@entry=
    0x7fffc00426c0, cairo=cairo@entry=0xb44a90, printing=printing@entry=false, 
    print_flags=print_flags@entry=POPPLER_PRINT_DOCUMENT)
    at poppler-page.cc:358
#26 0x00007fffe45da1cb in poppler_page_render (page=0x7fffc00426c0, cairo=
    0xb44a90) at poppler-page.cc:384
#27 0x00007fffec229240 in pdf_page_render (page=page@entry=0x7fffc00426c0, 
    width=478, height=358, rc=rc@entry=0xb4f780) at ev-poppler.cc:359
#28 0x00007fffec22950b in pdf_document_render (document=<optimized out>, rc=
    0xb4f780) at ev-poppler.cc:392
#29 0x00007ffff7798003 in ev_document_render (document=<optimized out>, 
    rc=rc@entry=0xb4f780) at ev-document.c:582
#30 0x00007ffff755ca6c in ev_job_render_run (job=0x8fbbc0) at ev-jobs.c:611
#31 0x00007ffff755bda9 in ev_job_run (job=job@entry=0x8fbbc0) at ev-jobs.c:213
#32 0x00007ffff755d694 in ev_job_thread (job=0x8fbbc0)
    at ev-job-scheduler.c:204
#33 ev_job_thread_proxy (data=<optimized out>) at ev-job-scheduler.c:237
#34 0x00007ffff542b0e5 in ?? () from /usr/lib/libglib-2.0.so.0
#35 0x00007ffff4eb2e0f in start_thread () from /usr/lib/libpthread.so.0
#36 0x00007ffff4bea45d in clone () from /usr/lib/libc.so.6