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backtrace.c: should skip first (innermost) frame w/out position; #5394

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Otherwise we suffer `(unknown):0:` errors.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2021-04-19 15:33:54 +09:00
parent 049ec9056e
commit 85808e50b0
1 changed files with 2 additions and 0 deletions
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src/backtrace.c
+2
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@@ -33,6 +33,7 @@ static void
each_backtrace(mrb_state *mrb, ptrdiff_t ciidx, each_backtrace_func func, void *data)
{
ptrdiff_t i;
int n = 0;
if (ciidx >= mrb->c->ciend - mrb->c->cibase)
ciidx = 10; /* ciidx is broken... */
@@ -61,6 +62,7 @@ each_backtrace(mrb_state *mrb, ptrdiff_t ciidx, each_backtrace_func func, void *
idx = (uint32_t)(pc - irep->iseq);
loc.lineno = mrb_debug_get_line(mrb, irep, idx);
if (n++ == 0 && loc.lineno == -1) continue;
loc.filename = mrb_debug_get_filename(mrb, irep, idx);
if (!loc.filename) {