cmd/gc: fix <-<-expr
The temporary-introducing pass was not recursing
into the argumnt of a receive operation.
Fixes #8011.
LGTM=r
R=golang-codereviews, r
CC=golang-codereviews, iant, khr
https://golang.org/cl/91540043
diff --git a/test/fixedbugs/issue8011.go b/test/fixedbugs/issue8011.go
new file mode 100644
index 0000000..b966174
--- /dev/null
+++ b/test/fixedbugs/issue8011.go
@@ -0,0 +1,18 @@
+// run
+
+// 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 main
+
+func main() {
+ c := make(chan chan int, 1)
+ c1 := make(chan int, 1)
+ c1 <- 42
+ c <- c1
+ x := <-<-c
+ if x != 42 {
+ println("BUG:", x, "!= 42")
+ }
+}
