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-rw-r--r--src/codedump.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/codedump.c b/src/codedump.c
index 24fc94ef7..106312f67 100644
--- a/src/codedump.c
+++ b/src/codedump.c
@@ -11,6 +11,7 @@ print_r(mrb_state *mrb, const mrb_irep *irep, size_t n)
{
if (n == 0) return;
if (n > irep->nlocals) return;
+ if (!irep->lv[n-1]) return;
printf(" R%d:%s", (int)n, mrb_sym_dump(mrb, irep->lv[n-1]));
}