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-rw-r--r--test/fixedbugs/issue49005a.go13
1 files changed, 13 insertions, 0 deletions
diff --git a/test/fixedbugs/issue49005a.go b/test/fixedbugs/issue49005a.go
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+++ b/test/fixedbugs/issue49005a.go
@@ -0,0 +1,13 @@
+// errorcheck
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+type T interface{ M() }
+
+func F() T
+
+var _ = F().(*X) // ERROR "undefined: X"