go source for verification 2026-05-22

test/fixedbugs/issue12525.go

@@ -0,0 +1,26 @@
+// errorcheck
+
+// 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.
+
+// Issue 12525: confusing error trying to increment boolean value
+
+package main
+
+func main() {
+	var i int
+	i++
+
+	var f float64
+	f++
+
+	var c complex128
+	c++
+
+	var b bool
+	b++ // ERROR "invalid operation: b\+\+ \(non-numeric type bool\)"
+
+	var s string
+	s-- // ERROR "invalid operation: s-- \(non-numeric type string\)"
+}