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-rw-r--r--vm_insnhelper.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 9a615df26f..9f3c00d6c9 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -1919,8 +1919,8 @@ vm_call_method_missing(rb_thread_t *th, rb_control_frame_t *reg_cfp, struct rb_c
/* shift arguments: m(a, b, c) #=> method_missing(:m, a, b, c) */
CHECK_VM_STACK_OVERFLOW(reg_cfp, 1);
- if (argc > 0) {
- MEMMOVE(argv+1, argv, VALUE, argc);
+ if (argc > 1) {
+ MEMMOVE(argv+1, argv, VALUE, argc-1);
}
argv[0] = ID2SYM(orig_ci->mid);
INC_SP(1);