From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Fri, 28 Apr 2017 14:23:26 +0000 (-0700)
Subject: cmd/compile: prevent infinite recursion printing types in Fatalf
X-Git-Tag: go1.9beta1~412
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=85d6a29ae60fa914a5fb12d061422a63694aa9be;p=gostls13.git

cmd/compile: prevent infinite recursion printing types in Fatalf

Updates #20162

Change-Id: Ie289bae0d0be8430e492ac73fd6e6bf36991d4a1
Reviewed-on: https://go-review.googlesource.com/42130
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
---

diff --git a/src/cmd/compile/internal/gc/align.go b/src/cmd/compile/internal/gc/align.go
index a270adf653..6f7e67ca93 100644
--- a/src/cmd/compile/internal/gc/align.go
+++ b/src/cmd/compile/internal/gc/align.go
@@ -183,6 +183,11 @@ func dowidth(t *types.Type) {
 	}
 
 	if sizeCalculationDisabled {
+		if t.Broke() {
+			// break infinite recursion from Fatal call below
+			return
+		}
+		t.SetBroke(true)
 		Fatalf("width not calculated: %v", t)
 	}