In Poppler 0.59.0 memory corruption occurs in a call to Object::dictLookup() in Object.h after a repeating series of Gfx::display Gfx::go Gfx::execOp Gfx::opFill Gfx::doPatternFill Gfx::doTilingPatternFill and Gfx::drawForm calls (aka a Gfx.cc infinite loop) a different vulnerability than CVE-2017-14519.