|  | // 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. | 
|  |  | 
|  | // Issue 7214: No duplicate key error for maps with interface{} key type | 
|  |  | 
|  | package p | 
|  |  | 
|  | var _ = map[interface{}]int{2: 1, 2: 1} // ERROR "duplicate key" | 
|  | var _ = map[interface{}]int{int(2): 1, int16(2): 1} | 
|  | var _ = map[interface{}]int{int16(2): 1, int16(2): 1} // ERROR "duplicate key" | 
|  |  | 
|  | type S string | 
|  |  | 
|  | var _ = map[interface{}]int{"a": 1, "a": 1} // ERROR "duplicate key" | 
|  | var _ = map[interface{}]int{"a": 1, S("a"): 1} | 
|  | var _ = map[interface{}]int{S("a"): 1, S("a"): 1} // ERROR "duplicate key" | 
|  |  | 
|  | type I interface { | 
|  | f() | 
|  | } | 
|  |  | 
|  | type N int | 
|  |  | 
|  | func (N) f() {} | 
|  |  | 
|  | var _ = map[I]int{N(0): 1, N(2): 1} | 
|  | var _ = map[I]int{N(2): 1, N(2): 1} // ERROR "duplicate key" |