--- a/libbacktrace/Backtrace.cpp

+++ b/libbacktrace/Backtrace.cpp

@@ -159,4 +159,5 @@ std::string Backtrace::GetErrorString(BacktraceUnwindError error) {

   case BACKTRACE_UNWIND_ERROR_INVALID_ELF:

     return "Failed to unwind due to invalid elf";

   }

+  return "Unhandled error";

 }