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cmd/compile: don't permit declarations in post statement of for loop
Report syntax error that was missed when moving to new parser. Fixes #19610. Change-Id: Ie5625f907a84089dc56fcccfd4f24df546042783 Reviewed-on: https://go-review.googlesource.com/38375 Reviewed-by: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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@ -1722,6 +1722,9 @@ func (p *parser) header(keyword token) (init SimpleStmt, cond Expr, post SimpleS
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p.want(_Semi)
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if p.tok != _Lbrace {
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post = p.simpleStmt(nil, false)
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if a, _ := post.(*AssignStmt); a != nil && a.Op == Def {
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p.syntax_error_at(a.Pos(), "cannot declare in post statement of for loop")
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}
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}
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} else if p.tok != _Lbrace {
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condStmt = p.simpleStmt(nil, false)
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14
test/fixedbugs/issue19610.go
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14
test/fixedbugs/issue19610.go
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@ -0,0 +1,14 @@
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// errorcheck
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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func main() {
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for ; ; x := 1 { // ERROR "cannot declare in post statement"
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_ = x
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break
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}
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}
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