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go/test/fixedbugs/issue22822.go
Daniel Martí 1e308fbc1a cmd/compile: improved error message when calling a shadowed builtin
Otherwise, the error can be confusing if one forgets or doesn't know
that the builtin is being shadowed, which is not common practice.

Fixes #22822.

Change-Id: I735393b5ce28cb83815a1c3f7cd2e7bb5080a32d
Reviewed-on: https://go-review.googlesource.com/97455
Reviewed-by: Robert Griesemer <gri@golang.org>
2018-02-28 19:39:52 +00:00

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Go

// errorcheck
// Copyright 2018 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 calling a function shadowing a built-in provides a good
// error message.
package main
func F() {
slice := []int{1, 2, 3}
len := int(2)
println(len(slice)) // ERROR "cannot call non-function len .type int., declared at"
}