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go/test/fixedbugs/issue14540.go
Matthew Dempsky 4347baac7d cmd/compile: eliminate OXFALL
Previously, we used OXFALL vs OFALL to distinguish fallthrough
statements that had been validated. Because in the Node AST we flatten
statement blocks, OXCASE and OXFALL needed to keep track of their
block scopes for this purpose.

Now that we have an AST that keeps these separate, we can just perform
the validation earlier.

Passes toolstash-check.

Fixes #14540.

Change-Id: I8421eaba16c2b3b72c9c5483b5cf20b14261385e
Reviewed-on: https://go-review.googlesource.com/61130
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2017-09-19 18:08:50 +00:00

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Go

// errorcheck
// Copyright 2017 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 p
func f(x int) {
switch x {
case 0:
fallthrough
; // ok
case 1:
fallthrough // ERROR "fallthrough statement out of place"
{}
case 2:
fallthrough // ERROR "cannot fallthrough"
}
}