1 files changed, 20 insertions, 0 deletions
diff --git a/test/fixedbugs/issue24159.go b/test/fixedbugs/issue24159.go
new file mode 100644
index 0000000..9397bdc
--- /dev/null
+++ b/test/fixedbugs/issue24159.go
@@ -0,0 +1,20 @@
+// errorcheck
+
+// Copyright 2018 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 intAlias = int
+
+func f() {
+	switch interface{}(nil) {
+	case uint8(0):
+	case byte(0): // ERROR "duplicate case"
+	case int32(0):
+	case rune(0): // ERROR "duplicate case"
+	case int(0):
+	case intAlias(0): // ERROR "duplicate case"
+	}
+}