cmd/gc: diagnose "make([]T, non-integer)" correctly.
Fixes #7223.
LGTM=rsc
R=golang-codereviews, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/63040043
diff --git a/test/fixedbugs/issue7223.go b/test/fixedbugs/issue7223.go
new file mode 100644
index 0000000..c5955d5
--- /dev/null
+++ b/test/fixedbugs/issue7223.go
@@ -0,0 +1,20 @@
+// errorcheck
+
+// 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
+
+var bits1 uint = 10
+const bits2 uint = 10
+
+func main() {
+ _ = make([]byte, 1<<bits1)
+ _ = make([]byte, 1<<bits2)
+ _ = make([]byte, nil) // ERROR "non-integer.*len"
+ _ = make([]byte, nil, 2) // ERROR "non-integer.*len"
+ _ = make([]byte, 1, nil) // ERROR "non-integer.*cap"
+ _ = make([]byte, true) // ERROR "non-integer.*len"
+ _ = make([]byte, "abc") // ERROR "non-integer.*len"
+}
