not a bug by current understanding, so delete this file.

6g says: bug138.go:8: constant -1 overflows uint
gccgo says: bug138.go:8:16: error: integer constant overflow

R=rsc
DELTA=19  (0 added, 19 deleted, 0 changed)
OCL=27099
CL=27149

test/bugs/bug138.go

-// Copyright 2009 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.
-
-// $G $D/$F.go || echo BUG should compile
-
-package main
-
-func main() {
-	const c int = -1;
-	var i int = -1;
-	var xc uint = uint(c);  // this does not work
-	var xi uint = uint(i);  // this works
-}
-
-/*
-bug138.go:8: overflow converting constant to uint
-bug138.go:8: illegal combination of literals CONV 7
-*/

test/golden.out

@@ -111,10 +111,6 @@ BUG: compilation succeeds incorrectly
 =========== bugs/bug136.go
 BUG: should not compile
 
-=========== bugs/bug138.go
-bugs/bug138.go:8: constant -1 overflows uint
-BUG should compile
-
 =========== bugs/bug139.go
 bugs/bug139.go:7: fatal error: naddr: ONAME class x 5