Initial commit: Go 1.23 release state

test/fixedbugs/bug148.go

@@ -0,0 +1,54 @@
+// run
+
+// Copyright 2009 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
+
+type T struct {a, b int};
+
+func println(x, y int) { }
+
+func f(x interface{}) interface{} {
+	type T struct {a, b int};
+
+	if x == nil {
+		return T{2, 3};
+	}
+
+	t := x.(T);
+	println(t.a, t.b);
+	return x;
+}
+
+func main() {
+	inner_T := f(nil);
+	f(inner_T);
+
+	shouldPanic(p1)
+}
+
+func p1() {
+	outer_T := T{5, 7};
+	f(outer_T);
+}
+
+func shouldPanic(f func()) {
+	defer func() {
+		if recover() == nil {
+			panic("function should panic")
+		}
+	}()
+	f()
+}
+
+/*
+This prints:
+
+2 3
+5 7
+
+but it should crash: The type assertion on line 18 should fail
+for the 2nd call to f with outer_T.
+*/