Initial commit: Go 1.23 release state

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")
+}