go/test/fixedbugs/issue20145.go
Josh Bleecher Snyder 0b6a10ef24 cmd/compile: dowidth more in the front end
dowidth is fundamentally unsafe to call from the back end;
it will cause data races.

Replace all calls to dowidth in the backend with
assertions that the width has been calculated.

Then fix all the cases in which that was not so,
including the cases from #20145.

Fixes #20145.

Change-Id: Idba3d19d75638851a30ec2ebcdb703c19da3e92b
Reviewed-on: https://go-review.googlesource.com/41970
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-04-27 22:10:32 +00:00

15 lines
321 B
Go

// compile
// 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 20145: some func types weren't dowidth-ed by the front end,
// leading to races in the backend.
package p
func f() {
_ = (func())(nil)
}