_Unwind_Backtrace(Unwind_Trace, &arg);
// We need to pop a few frames so that pc is on top.
uptr to_pop = LocatePcInTrace(pc);
- // trace_buffer[0] belongs to the current function so we always pop it.
+ // trace_buffer[0] belongs to the current function so we always pop it,
+ // unless there is only 1 frame in the stack trace (1 frame is always better
+ // than 0!).
+ // 1-frame stacks don't normally happen, but this depends on the actual
+ // unwinder implementation (libgcc, libunwind, etc) which is outside of our
+ // control.
if (to_pop == 0 && size > 1)
to_pop = 1;
PopStackFrames(to_pop);