https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345
Bug ID: 96345 Summary: __cxa demangle fails to demangle a very long string Product: gcc Version: 10.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: hededrk at gmail dot com Target Milestone: --- I found this bug because one of my tests started to fail (not sure when it started to fail because I've set up CI only yesterday). I assume this is a bug because GCC is able to produce such names. Steps to reproduce: 1. compile attached file g++ -c cxa_demangle_fail.cpp 2. obtain mangled name with nm nm cxa_demangle_fail.o 3. pass that name into abi::__cxa_demangle auto name = /*long string*/; size_t size = 1024; auto memory = static_cast<char*>(malloc(size)); int status; auto demangled = abi::__cxa_demangle(name, memory, &size, &status); Result: __cxa_demangle fails with code -2.