gc: fix error for 1 <- "foo"

was
x.go:4: invalid operation: 1 <- "foo" (send to receive-only type int)

now
x.go:4: invalid operation: 1 <- "foo" (send to non-chan type int)

R=ken2
CC=golang-dev
https://golang.org/cl/2330042

diff --git a/src/cmd/gc/typecheck.c b/src/cmd/gc/typecheck.c
index bb4571d9ff2ea497631f27995887fa862e7b9e23..f139ee8210233dd2f375dbd9c87383c20108b421 100644 (file)
--- a/src/cmd/gc/typecheck.c
+++ b/src/cmd/gc/typecheck.c
@@ -644,6 +644,10 @@ reswitch:
                l = n->left;
                if((t = l->type) == T)
                        goto error;
+               if(t->etype != TCHAN) {
+                       yyerror("invalid operation: %#N (send to non-chan type %T)", n, t);
+                       goto error;
+               }
                if(!(t->chan & Csend)) {
                        yyerror("invalid operation: %#N (send to receive-only type %T)", n, t);
                        goto error;