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-rw-r--r--src/backtrace.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backtrace.c b/src/backtrace.c
index 6469fc069..c18a7cb95 100644
--- a/src/backtrace.c
+++ b/src/backtrace.c
@@ -72,6 +72,7 @@ output_backtrace(mrb_state *mrb, mrb_int ciidx, mrb_code *pc0, output_stream_fun
filename = NULL;
lineno = -1;
+ if (!ci->proc) continue;
if (MRB_PROC_CFUNC_P(ci->proc)) {
continue;
}