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-rw-r--r--test/fixedbugs/issue19911.go34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/fixedbugs/issue19911.go b/test/fixedbugs/issue19911.go
new file mode 100644
index 0000000..af7f598
--- /dev/null
+++ b/test/fixedbugs/issue19911.go
@@ -0,0 +1,34 @@
+// run
+
+// Copyright 2017 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 main
+
+import (
+ "fmt"
+ "strings"
+)
+
+type ET struct{}
+
+func (*ET) Error() string { return "err" }
+
+func main() {
+ check("false", fmt.Sprintf("(*ET)(nil) == error(nil): %v", (*ET)(nil) == error(nil)))
+ check("true", fmt.Sprintf("(*ET)(nil) != error(nil): %v", (*ET)(nil) != error(nil)))
+
+ nilET := (*ET)(nil)
+ nilError := error(nil)
+
+ check("false", fmt.Sprintf("nilET == nilError: %v", nilET == nilError))
+ check("true", fmt.Sprintf("nilET != nilError: %v", nilET != nilError))
+}
+
+func check(want, gotfull string) {
+ got := gotfull[strings.Index(gotfull, ": ")+len(": "):]
+ if got != want {
+ panic("want " + want + " got " + got + " from " + gotfull)
+ }
+}