go source for verification 2026-05-22

test/fixedbugs/issue20250.go

@@ -0,0 +1,26 @@
+// errorcheck -0 -live -l
+
+//go:build !goexperiment.cgocheck2
+
+// 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.
+
+// Issue 20250: liveness differed with concurrent compilation
+// due to propagation of addrtaken to outer variables for
+// closure variables.
+
+package p
+
+type T struct {
+	s [2]string
+}
+
+func f(a T) { // ERROR "live at entry to f: a$"
+	var e interface{} // ERROR "stack object e interface \{\}$"
+	func() {          // ERROR "live at entry to f.func1: &e a$"
+		e = a.s // ERROR "live at call to convT: &e$" "stack object a T$"
+	}()
+	// Before the fix, both a and e were live at the previous line.
+	_ = e
+}