[poppler] Bug rendering PDF spec Version 1.5, PDF 1.4 configuration

[Brad Hards]

My stress test is showing a problem with PDFReference15_v5.pdf (doesn't appear
to occur with PDFReference15_v6.pdf).

I'm having a lot of trouble understanding the valgrind backtraces:
Doing PDFReference15_v5.pdf :
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.......................................==6811==
==6811== Conditional jump or move depends on uninitialised value(s)
==6811==    at 0x408BB1E: GfxDeviceGrayColorSpace::getGray(GfxColor*, int*) (GfxState.cc:29)
==6811==    by 0x4051CB5: SplashOutputDev::updateFillColor(GfxState*) (GfxState.h:1065)
==6811==    by 0x407DE5E: Gfx::doTilingPatternFill(GfxTilingPattern*, int, int) (Gfx.cc:1701)
==6811==    by 0x408328B: Gfx::doPatternFill(int) (Gfx.cc:1588)
==6811==    by 0x4083601: Gfx::opFillStroke(Object*, int) (Gfx.cc:1498)
==6811==    by 0x4077602: Gfx::execOp(Object*, Object*, int) (Gfx.cc:717)
==6811==    by 0x40777BC: Gfx::go(int) (Gfx.cc:588)
==6811==    by 0x4077D26: Gfx::display(Object*, int) (Gfx.cc:557)
==6811==    by 0x40BD915: Page::displaySlice(OutputDev*, double, double, int, int, int, int, int, int, int, int, Catalog*, int (*)(void*),
void*, int (*)(Annot*, void*), void*) (Page.cc:406)
==6811==    by 0x40BF9E6: PDFDoc::displayPageSlice(OutputDev*, int, double, double, int, int, int, int, int, int, int, int, int (*)(void*),
 void*, int (*)(Annot*, void*), void*) (PDFDoc.cc:396)
==6811==    by 0x41A8C6F: Poppler::Page::renderToImage(double, double, int, int, int, int, Poppler::Page::Rotation) const (poppler-page.cc:
185)
==6811==    by 0x804A513: main (stress-poppler-dir.cpp:48)
==6811==
==6811== Conditional jump or move depends on uninitialised value(s)
==6811==    at 0x40932C1: GfxDeviceGrayColorSpace::getRGB(GfxColor*, GfxRGB*) (GfxState.cc:249)
==6811==    by 0x4051CCB: SplashOutputDev::updateFillColor(GfxState*) (GfxState.h:1069)
==6811==    by 0x407DE5E: Gfx::doTilingPatternFill(GfxTilingPattern*, int, int) (Gfx.cc:1701)
==6811==    by 0x408328B: Gfx::doPatternFill(int) (Gfx.cc:1588)
==6811==    by 0x4083601: Gfx::opFillStroke(Object*, int) (Gfx.cc:1498)
==6811==    by 0x4077602: Gfx::execOp(Object*, Object*, int) (Gfx.cc:717)
==6811==    by 0x40777BC: Gfx::go(int) (Gfx.cc:588)
==6811==    by 0x4077D26: Gfx::display(Object*, int) (Gfx.cc:557)
==6811==    by 0x40BD915: Page::displaySlice(OutputDev*, double, double, int, int, int, int, int, int, int, int, Catalog*, int (*)(void*),
void*, int (*)(Annot*, void*), void*) (Page.cc:406)
==6811==    by 0x40BF9E6: PDFDoc::displayPageSlice(OutputDev*, int, double, double, int, int, int, int, int, int, int, int, int (*)(void*),
 void*, int (*)(Annot*, void*), void*) (PDFDoc.cc:396)
==6811==    by 0x41A8C6F: Poppler::Page::renderToImage(double, double, int, int, int, int, Poppler::Page::Rotation) const (poppler-page.cc:
185)
==6811==    by 0x804A513: main (stress-poppler-dir.cpp:48)
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[Note: each dot represents a page that we rendered to an image - this is a page towards the end]

Any ideas?

Brad
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