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cmd/internal/obj: don't crash on nil in Prog.String

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I can't remember just how this happened to me, but I got an unfortunate
crash with some set of cmd/compile debug options and source code.

Change-Id: Ibef6129c50b68dad0594ac439466bfbc4b32a095
Reviewed-on: https://go-review.googlesource.com/19920
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Ian Lance Taylor 2016-02-25 10:44:31 -08:00
parent d44088f173
commit 14113b3a89
1 changed files with 4 additions and 0 deletions
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4
src/cmd/internal/obj/util.go
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@ -287,6 +287,10 @@ func CConv(s uint8) string {
}
func (p *Prog) String() string {
if p == nil {
return "<nil Prog>"
}
if p.Ctxt == nil {
return "<Prog without ctxt>"
}