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cmd/compile: fix compiler crash on recursive types

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By setting both a valid size and alignment for broken recursive types,
we can appease some more safety checks and prevent compiler crashes.

Fixes #21882.

Change-Id: Ibaa137d8aa2c2a9d521462f144d7016c4abfd6e7
Reviewed-on: https://go-review.googlesource.com/64430
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Matthew Dempsky 2017-09-18 11:54:03 -07:00
parent 9ee6f7b061
commit bb2f0da23a
2 changed files with 10 additions and 0 deletions
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1
src/cmd/compile/internal/gc/align.go
View file

@ -176,6 +176,7 @@ func dowidth(t *types.Type) {
}
t.Width = 0
t.Align = 1
return
}

9
test/fixedbugs/issue21882.go Normal file
View file

@ -0,0 +1,9 @@
// errorcheck
// 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.
package p
type T [2]T // ERROR "invalid recursive type"