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f22ef70254
Historically, gc optimistically parsed the left-hand side of assignments as expressions. Later, if it discovered a ":=" assignment, it rewrote the parsed expressions as declarations. This failed in the presence of dot imports though, because we lost information about whether an imported object was named via a bare identifier "Foo" or a normal qualified "pkg.Foo". This CL fixes the issue by specially noding the left-hand side of ":=" assignments. Fixes #22076. Change-Id: I18190ecdb863112e7d009e1687e6112eec559921 Reviewed-on: https://go-review.googlesource.com/66810 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Daniel Martí <mvdan@mvdan.cc> Reviewed-by: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
25 lines
713 B
Go
25 lines
713 B
Go
// errorcheck -0 -live -d=compilelater
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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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// Issue 20250: liveness differed with concurrent compilation
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// due to propagation of addrtaken to outer variables for
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// closure variables.
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package p
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type T struct {
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s string
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}
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func f(a T) { // ERROR "live at entry to f: a"
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var e interface{}
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func() { // ERROR "live at entry to f.func1: a &e"
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e = a.s // ERROR "live at call to convT2Estring: a &e" "live at call to writebarrierptr: a"
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}() // ERROR "live at call to f.func1: e$"
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// Before the fix, both a and e were live at the previous line.
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_ = e
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}
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