From 8d47b0825549b9ec55882e0d2c135048d88734b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9my=20Oudompheng?= <oudomphe@phare.normalesup.org>
Date: Mon, 15 Sep 2014 18:24:16 +0200
Subject: [PATCH] cmd/gc: generate type alg after calling dowidth.

Previously it might happen before calling dowidth and
result in a compiler crash.

Fixes #8060.

LGTM=dvyukov, rsc
R=golang-codereviews, dvyukov, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/110980044
---
 src/cmd/gc/reflect.c              |  2 +-
 test/fixedbugs/issue8060.dir/a.go |  7 +++++++
 test/fixedbugs/issue8060.dir/b.go | 13 +++++++++++++
 test/fixedbugs/issue8060.go       |  9 +++++++++
 4 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 test/fixedbugs/issue8060.dir/a.go
 create mode 100644 test/fixedbugs/issue8060.dir/b.go
 create mode 100644 test/fixedbugs/issue8060.go

diff --git a/src/cmd/gc/reflect.c b/src/cmd/gc/reflect.c
index 31e449e760f..4892ab75708 100644
--- a/src/cmd/gc/reflect.c
+++ b/src/cmd/gc/reflect.c
@@ -727,12 +727,12 @@ dcommontype(Sym *s, int ot, Type *t)
 	sizeofAlg = 2*widthptr;
 	if(algarray == nil)
 		algarray = pkglookup("algarray", runtimepkg);
+	dowidth(t);
 	alg = algtype(t);
 	algsym = S;
 	if(alg < 0)
 		algsym = dalgsym(t);
 
-	dowidth(t);
 	if(t->sym != nil && !isptr[t->etype])
 		sptr = dtypesym(ptrto(t));
 	else
diff --git a/test/fixedbugs/issue8060.dir/a.go b/test/fixedbugs/issue8060.dir/a.go
new file mode 100644
index 00000000000..22ba69ee1be
--- /dev/null
+++ b/test/fixedbugs/issue8060.dir/a.go
@@ -0,0 +1,7 @@
+// Copyright 2014 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 a
+
+var A = []*[2][1]float64{}
diff --git a/test/fixedbugs/issue8060.dir/b.go b/test/fixedbugs/issue8060.dir/b.go
new file mode 100644
index 00000000000..85fb6ec7db7
--- /dev/null
+++ b/test/fixedbugs/issue8060.dir/b.go
@@ -0,0 +1,13 @@
+// Copyright 2014 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 b
+
+import "a"
+
+var X = a.A
+
+func b() {
+	_ = [3][1]float64{}
+}
diff --git a/test/fixedbugs/issue8060.go b/test/fixedbugs/issue8060.go
new file mode 100644
index 00000000000..ec52659e6ea
--- /dev/null
+++ b/test/fixedbugs/issue8060.go
@@ -0,0 +1,9 @@
+// compiledir
+
+// Copyright 2014 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 8060: internal compiler error.
+
+package ignored