/usr/share/go-1.8/test/fixedbugs/issue13273.go is in golang-1.8-src 1.8.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | // errorcheck
// Copyright 2015 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.
// Check that we correctly construct (and report errors)
// for unary expressions of the form <-x where we only
// know after parsing x whether <-x is a receive operation
// or a channel type.
package n
func f() {
// test case from issue 13273
<-chan int((chan int)(nil))
<-chan int(nil)
<-chan chan int(nil)
<-chan chan chan int(nil)
<-chan chan chan chan int(nil)
<-chan chan chan chan chan int(nil)
<-chan<-chan int(nil)
<-chan<-chan<-chan int(nil)
<-chan<-chan<-chan<-chan int(nil)
<-chan<-chan<-chan<-chan<-chan int(nil)
<-chan (<-chan int)(nil)
<-chan (<-chan (<-chan int))(nil)
<-chan (<-chan (<-chan (<-chan int)))(nil)
<-chan (<-chan (<-chan (<-chan (<-chan int))))(nil)
<-(<-chan int)(nil)
<-(<-chan chan int)(nil)
<-(<-chan chan chan int)(nil)
<-(<-chan chan chan chan int)(nil)
<-(<-chan chan chan chan chan int)(nil)
<-(<-chan<-chan int)(nil)
<-(<-chan<-chan<-chan int)(nil)
<-(<-chan<-chan<-chan<-chan int)(nil)
<-(<-chan<-chan<-chan<-chan<-chan int)(nil)
<-(<-chan (<-chan int))(nil)
<-(<-chan (<-chan (<-chan int)))(nil)
<-(<-chan (<-chan (<-chan (<-chan int))))(nil)
<-(<-chan (<-chan (<-chan (<-chan (<-chan int)))))(nil)
type _ <-<-chan int // ERROR "unexpected <-, expecting chan"
<-<-chan int // ERROR "unexpected <-, expecting chan|expecting {" (new parser: same error as for type decl)
type _ <-chan<-int // ERROR "unexpected int, expecting chan|expecting chan"
<-chan<-int // ERROR "unexpected int, expecting chan|expecting {" (new parser: same error as for type decl)
}
|