libxslt/xpath: Crash in xmlXPathCompileExpr

Project: https://gitlab.gnome.org/GNOME/libxslt.git Detailed report: https://oss-fuzz.com/testcase?key=5702070090334208 Project: libxslt Fuzzer: libFuzzerlibxsltxpath Fuzz target binary: xpath Job Type: libfuzzerubsanlibxslt Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x7fccc6e37fd...