From 761830f48196aa1170b5224c1da34f4e20053ebd Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Thu, 8 Nov 2012 16:07:05 -0500
Subject: [PATCH] cmd/gc: fix export of inlined function body with type guard

When exporting a body containing
        x, ok := v.(Type)

the definition for Type was not being included, so when the body
was actually used, it would cause an "unknown type" compiler error.

Fixes #4370.

R=ken2
CC=golang-dev
https://golang.org/cl/6827064
---
 src/cmd/gc/export.c                |  1 +
 test/fixedbugs/issue4370.dir/p1.go | 20 ++++++++++++++++++++
 test/fixedbugs/issue4370.dir/p2.go | 16 ++++++++++++++++
 test/fixedbugs/issue4370.dir/p3.go | 13 +++++++++++++
 test/fixedbugs/issue4370.go        |  9 +++++++++
 5 files changed, 59 insertions(+)
 create mode 100644 test/fixedbugs/issue4370.dir/p1.go
 create mode 100644 test/fixedbugs/issue4370.dir/p2.go
 create mode 100644 test/fixedbugs/issue4370.dir/p3.go
 create mode 100644 test/fixedbugs/issue4370.go

diff --git a/src/cmd/gc/export.c b/src/cmd/gc/export.c
index 50303afd80..ad0dc740d6 100644
--- a/src/cmd/gc/export.c
+++ b/src/cmd/gc/export.c
@@ -152,6 +152,7 @@ reexportdep(Node *n)
 	case OCONVIFACE:
 	case OCONVNOP:
 	case ODOTTYPE:
+	case ODOTTYPE2:
 	case OSTRUCTLIT:
 	case OPTRLIT:
 		t = n->type;
diff --git a/test/fixedbugs/issue4370.dir/p1.go b/test/fixedbugs/issue4370.dir/p1.go
new file mode 100644
index 0000000000..d732c8b363
--- /dev/null
+++ b/test/fixedbugs/issue4370.dir/p1.go
@@ -0,0 +1,20 @@
+// Copyright 2012 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 p1
+
+type Magic int
+
+type T struct {
+	x interface{}
+}
+
+func (t *T) M() bool {
+	_, ok := t.x.(Magic)
+	return ok
+}
+
+func F(t *T) {
+	println(t)
+}
diff --git a/test/fixedbugs/issue4370.dir/p2.go b/test/fixedbugs/issue4370.dir/p2.go
new file mode 100644
index 0000000000..33370d07a4
--- /dev/null
+++ b/test/fixedbugs/issue4370.dir/p2.go
@@ -0,0 +1,16 @@
+// Copyright 2012 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 p2
+
+import "./p1"
+
+type T struct {
+	p1.T
+}
+
+func F() {
+	var t T
+	p1.F(&t.T)
+}
diff --git a/test/fixedbugs/issue4370.dir/p3.go b/test/fixedbugs/issue4370.dir/p3.go
new file mode 100644
index 0000000000..13c996bc22
--- /dev/null
+++ b/test/fixedbugs/issue4370.dir/p3.go
@@ -0,0 +1,13 @@
+// Copyright 2012 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 p3
+
+import "./p2"
+
+func F() {
+	p2.F()
+	var t p2.T
+	println(t.T.M())
+}
diff --git a/test/fixedbugs/issue4370.go b/test/fixedbugs/issue4370.go
new file mode 100644
index 0000000000..76b47e1a6d
--- /dev/null
+++ b/test/fixedbugs/issue4370.go
@@ -0,0 +1,9 @@
+// compiledir
+
+// Copyright 2012 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.
+
+// Re-exporting inlined function bodies missed types in x, ok := v.(Type)
+
+package ignored
-- 
2.48.1