go source for verification 2026-05-22

test/fixedbugs/issue5820.go

@@ -0,0 +1,18 @@
+// run
+
+// Copyright 2013 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 5820: register clobber when clearfat and 64 bit arithmetic is interleaved.
+
+package main
+
+func main() {
+	array := make([][]int, 2)
+	index := uint64(1)
+	array[index] = nil
+	if array[1] != nil {
+		panic("array[1] != nil")
+	}
+}