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go/test/fixedbugs/issue20250.go
Matthew Dempsky cc90e7a51e [dev.regabi] cmd/compile: always use the compile queue
The compiler currently has two modes for compilation: one where it
compiles each function as it sees them, and another where it enqueues
them all into a work queue. A subsequent CL is going to reorder
function compilation to ensure that functions are always compiled
before any non-trivial function literals they enclose, and this will
be easier if we always use the compile work queue.

Also, fewer compilation modes makes things simpler to reason about.

Change-Id: Ie090e81f7476c49486296f2b90911fa0a466a5dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/283313
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-12 23:22:04 +00:00

25 lines
690 B
Go

// errorcheck -0 -live -l
// 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.
// Issue 20250: liveness differed with concurrent compilation
// due to propagation of addrtaken to outer variables for
// closure variables.
package p
type T struct {
s [2]string
}
func f(a T) { // ERROR "live at entry to f: a"
var e interface{} // ERROR "stack object e interface \{\}$"
func() { // ERROR "live at entry to f.func1: a &e"
e = a.s // ERROR "live at call to convT2E: &e" "stack object a T$"
}()
// Before the fix, both a and e were live at the previous line.
_ = e
}