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-rw-r--r--src/cmd/gc/swt.c2
-rw-r--r--test/fixedbugs/bug393.go30
2 files changed, 31 insertions, 1 deletions
diff --git a/src/cmd/gc/swt.c b/src/cmd/gc/swt.c
index 8b1b93c7da..6c0a9ac832 100644
--- a/src/cmd/gc/swt.c
+++ b/src/cmd/gc/swt.c
@@ -540,7 +540,7 @@ loop:
}
// deal with the variables one-at-a-time
- if(c0->type != Texprconst) {
+ if(!okforcmp[t->etype] || c0->type != Texprconst) {
a = exprbsw(c0, 1, arg);
cas = list(cas, a);
c0 = c0->link;
diff --git a/test/fixedbugs/bug393.go b/test/fixedbugs/bug393.go
new file mode 100644
index 0000000000..e21b9c4a41
--- /dev/null
+++ b/test/fixedbugs/bug393.go
@@ -0,0 +1,30 @@
+// $G $D/$F.go || echo BUG: bug393
+
+// 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.
+
+// issue 2672
+// was trying binary search with an interface type
+
+package main
+
+func f(x interface{}) int {
+ switch x {
+ case 1:
+ return 1
+ case 2:
+ return 2
+ case 3:
+ return 3
+ case 4:
+ return 4
+ case "5":
+ return 5
+ case "6":
+ return 6
+ default:
+ return 7
+ }
+ panic("switch")
+}