gc: undo most of 'fix infinite recursion for embedded interfaces'

Preserve test.

changeset:   11593:f1deaf35e1d1
user:        Luuk van Dijk <lvd@golang.org>
date:        Tue Jan 17 10:00:57 2012 +0100
summary:     gc: fix infinite recursion for embedded interfaces

This is causing 'interface type loop' errors during compilation
of a complex program.  I don't understand what's happening
well enough to boil it down to a simple test case, but undoing
this change fixes the problem.

The change being undone is fixing a corner case (uses of
pointer to interface in an interface definition) that basically
only comes up in erroneous Go programs.  Let's not try to
fix this again until after Go 1.

Unfixes issue 1909.

TBR=lvd
CC=golang-dev
http://codereview.appspot.com/5555063

1 files changed, 22 insertions, 0 deletions

diff --git a/test/bugs/bug395.go b/test/bugs/bug395.go
new file mode 100644
index 000000000..adf74497c
--- /dev/null
+++ b/test/bugs/bug395.go
@@ -0,0 +1,22 @@
+// echo bug395 is broken  # takes 90+ seconds to break
+// # $G $D/$F.go || echo bug395
+
+// Copyright 2011 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 1909
+// Would OOM due to exponential recursion on Foo's expanded methodset in nodefmt
+package test
+
+type Foo interface {
+	Bar() interface {
+		Foo
+	}
+	Baz() interface {
+		Foo
+	}
+	Bug() interface {
+		Foo
+	}
+}