Hello all See also: https://stackoverflow.com/questions/54333608/boost-stacktrace-not-demangling... I am cross compiling boost on Unix for Windows with MINGW. I am using libbacktrace compiled using the same toolchain from here: https://github.com/ianlancetaylor/libbacktrace Digging through the code of libbacktrace I was able to deduce that in a success case the return value of backtrace_pcinfo will be the return value of the callback supplied to that function (for DWARF search). The callback boost is giving looks like this: inline int libbacktrace_full_callback(void *data, uintptr_t /*pc*/, const char *filename, int lineno, const char *function) { pc_data& d = *static_cast<pc_data*>(data); if (d.filename && filename) { *d.filename = filename; } if (d.function && function) { *d.function = function; } d.line = lineno; return 0; } As you can see it will always return 0. This causes an issue with the way the function is called: ::backtrace_pcinfo:( state, reinterpret_cast<uintptr_t>(addr), boost::stacktrace::detail::libbacktrace_full_callback, boost::stacktrace::detail::libbacktrace_error_callback, &data ) || ::backtrace_syminfo:( state, reinterpret_cast<uintptr_t>(addr), boost::stacktrace::detail::libbacktrace_syminfo_callback, boost::stacktrace::detail::libbacktrace_error_callback, &data ); If the symbol is found using backtrace_pcinfo the return value will be 0. If its not found it will be 0. It will always use the value provided by backtrace_syminfo. Is this intended? BR Cromon