From ca0f32a208052e485f02c803ce5ea249b0f7e554 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 23 Dec 2017 10:43:47 +0900
Subject: `super` should raise `TypeError` when the receiver is switched; fix
 #3911

The receiver can be switched using `#instance_eval` etc.
---
 src/vm.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/vm.c')

diff --git a/src/vm.c b/src/vm.c
index 1b92746cd..084811499 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1606,6 +1606,12 @@ RETRY_TRY_BLOCK:
         }
       }
       recv = regs[0];
+      if (!mrb_obj_is_kind_of(mrb, recv, target_class)) {
+        mrb_value exc = mrb_exc_new_str_lit(mrb, E_TYPE_ERROR,
+                                            "self has wrong type to call super in this context");
+        mrb_exc_set(mrb, exc);
+        goto L_RAISE;
+      }
       blk = regs[bidx];
       if (!mrb_nil_p(blk) && mrb_type(blk) != MRB_TT_PROC) {
         blk = mrb_convert_type(mrb, blk, MRB_TT_PROC, "Proc", "to_proc");
-- 
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