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Diffstat (limited to '')
-rw-r--r-- | test/fixedbugs/issue16130.go | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/fixedbugs/issue16130.go b/test/fixedbugs/issue16130.go new file mode 100644 index 0000000..c4e3ffd --- /dev/null +++ b/test/fixedbugs/issue16130.go @@ -0,0 +1,43 @@ +// run + +// Copyright 2016 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. + +// Test that an interface conversion error panics with an "interface +// conversion" run-time error. It was (incorrectly) panicking with a +// "nil pointer dereference." + +package main + +import ( + "fmt" + "runtime" + "strings" +) + +type I interface { + Get() int +} + +func main() { + defer func() { + r := recover() + if r == nil { + panic("expected panic") + } + re, ok := r.(runtime.Error) + if !ok { + panic(fmt.Sprintf("got %T, expected runtime.Error", r)) + } + if !strings.Contains(re.Error(), "interface conversion") { + panic(fmt.Sprintf("got %q, expected interface conversion error", re.Error())) + } + }() + e := (interface{})(0) + if _, ok := e.(I); ok { + panic("unexpected interface conversion success") + } + fmt.Println(e.(I)) + panic("unexpected interface conversion success") +} |