1 files changed, 1 insertions, 0 deletions
diff --git a/src/vm.c b/src/vm.c
index 317b5f6b1..620f9e977 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1307,6 +1307,7 @@ RETRY_TRY_BLOCK:
       mrb->c->ci->argc = len;
       if (argc < len) {
         regs[len+1] = *blk; /* move block */
+        SET_NIL_VALUE(regs[argc+1]);
         if (argv0 != argv) {
           value_move(&regs[1], argv, argc-m2); /* m1 + o */
         }