An issue was discovered in QPDF before 7.0.0. There is an infinite loop in the QPDFWriter::enqueueObject() function in libqpdf/QPDFWriter.cc.
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{ "binaries": [ { "binary_version": "8.0.2-3~16.04.1", "binary_name": "libqpdf-dev" }, { "binary_version": "8.0.2-3~16.04.1", "binary_name": "libqpdf21" }, { "binary_version": "8.0.2-3~16.04.1", "binary_name": "qpdf" } ], "availability": "No subscription required" }