https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68159
camden.mannett at protonmail dot ch changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |camden.mannett at protonmail dot c | |h --- Comment #7 from camden.mannett at protonmail dot ch --- Also getting this when debugging a Boost 1.58 Test application: Reading symbols from ./SyrenProcessor_test.../build/gdb-HnfxP_/gdb-7.10/gdb/cp-support.c:1595: demangler-warning: unable to demangle '_ZSt7forwardIRZN9Algorithm5group11test_methodEvEUlOT_OT0_E_ES3_RNSt16remove_referenceIS2_E4typeE' (demangler failed with signal 11) Unable to dump core, use `ulimit -c unlimited' before executing GDB next time. /build/gdb-HnfxP_/gdb-7.10/gdb/cp-support.c:1608: demangler-warning: unable to demangle '_ZSt7forwardIRZN9Algorithm5group11test_methodEvEUlOT_OT0_E_ES3_RNSt16remove_referenceIS2_E4typeE' (demangler failed with signal 11) This is appearing on GDB 7.10 using g++ 5.2.1.