Initial commit: Go 1.23 release state

test/fixedbugs/issue4066.go

@@ -0,0 +1,37 @@
+// run
+
+// Copyright 2012 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.
+
+// issue 4066: return values not being spilled eagerly enough
+
+package main
+
+func main() {
+	n := foo()
+	if n != 2 {
+		println(n)
+		panic("wrong return value")
+	}
+}
+
+type terr struct{}
+
+func foo() (val int) {
+	val = 0
+	defer func() {
+		if x := recover(); x != nil {
+			_ = x.(terr)
+		}
+	}()
+	for {
+		val = 2
+		foo1()
+	}
+	panic("unreachable")
+}
+
+func foo1() {
+	panic(terr{})
+}