Bogus memory allocation size
==15480== ERROR: libFuzzer: fuzz target exited
    ...
    #5 0x5a849f in gmallocn(int, int, bool) poppler/goo/gmem.cc:190:10
    #6 0x6437d1 in GfxGouraudTriangleShading::parse(GfxResources*, int, Dict*, Stream*, OutputDev*, GfxState*) poppler/poppler/GfxState.cc:4921:30
    #7 0x63e923 in GfxShading::parse(GfxResources*, Object*, OutputDev*, GfxState*) poppler/poppler/GfxState.cc:3594:17
    #8 0x63db44 in GfxShadingPattern::parse(GfxResources*, Object*, OutputDev*, GfxState*, int) poppler/poppler/GfxState.cc:3482:14
    #9 0x63cce1 in GfxPattern::parse(GfxResources*, Object*, OutputDev*, GfxState*, int) poppler/poppler/GfxState.cc:3350:15
    #10 0x5e9190 in GfxResources::lookupPattern(char*, OutputDev*, GfxState*) poppler/poppler/Gfx.cc:471:12
    #11 0x5ddde0 in Gfx::opSetStrokeColorN(Object*, int) poppler/poppler/Gfx.cc:1665:18
    #12 0x5ec519 in Gfx::go(bool) poppler/poppler/Gfx.cc:747:7
    #13 0x5ebdec in Gfx::display(Object*, bool) poppler/poppler/Gfx.cc:709:3
    #14 0x68359c in Page::displaySlice(OutputDev*, double, double, int, bool, bool, int, int, int, int, bool, bool (*)(void*), void*, bool (*)(Annot*, void*), void*, bool) poppler/poppler/Page.cc:560:10
    #15 0x68d84f in PDFDoc::displayPageSlice(OutputDev*, int, double, double, int, bool, bool, bool, int, int, int, int, bool (*)(void*), void*, bool (*)(Annot*, void*), void*, bool) poppler/poppler/PDFDoc.cc:550:20
    #16 0x59b333 in poppler::page_renderer::render_page(poppler::page const*, double, double, int, int, int, int, poppler::rotation_enum) const poppler/cpp/poppler-page-renderer.cpp:180:13