Check `ensure` proc is NULL before calling; fix #3943

b43c1464 · Yukihiro "Matz" Matsumoto · 4c18e37f · b43c1464
Commit b43c1464 authored Feb 09, 2018 by Yukihiro "Matz" Matsumoto
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src/vm.c src/vm.c +1 -0

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--- a/src/vm.c
+++ b/src/vm.c
@@ -1351,6 +1351,7 @@ RETRY_TRY_BLOCK:
      for (n=0; n<a; n++) {
        proc = mrb->c->ensure[epos+n];
        mrb->c->ensure[epos+n] = NULL;
+        if (proc == NULL) continue;
        irep = proc->body.irep;
        ci = cipush(mrb);
        ci->mid = ci[-1].mid;