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-rw-r--r--src/variable.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/variable.c b/src/variable.c
index bce6e0ef3..1130b7aaf 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -48,6 +48,7 @@ iv_rehash(mrb_state *mrb, iv_tbl *t)
t->alloc = new_alloc;
t->size = 0;
t->ptr = (mrb_value*)mrb_calloc(mrb, sizeof(mrb_value)+sizeof(mrb_sym), new_alloc);
+ if (old_alloc == 0) return;
mrb_sym *keys = (mrb_sym*)&old_ptr[old_alloc];
mrb_value *vals = old_ptr;