mirror of
https://github.com/golang/go
synced 2024-11-11 20:40:21 -07:00
0e02cfb369
The fix for #35652 did not guarantee that it was using a non-empty src position to replace an empty one. The new code checks again and falls back to a more certain position. (The input in question compiles to a single empty infinite loop, and none of the actual instructions had any source position at all. That is a bug, but given the pathology of this input, not one worth dealing with this late in the release cycle, if ever.) Literally: 00000 (5) TEXT "".f(SB), ABIInternal 00001 (5) PCDATA $0, $-2 00002 (5) PCDATA $1, $-2 00003 (5) FUNCDATA $0, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB) 00004 (5) FUNCDATA $1, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB) 00005 (5) FUNCDATA $2, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB) b2 00006 (?) XCHGL AX, AX b6 00007 (+1048575) JMP 6 00008 (?) END TODO: Add runtime.InfiniteLoop(), replace infinite loops with a call to that, and use an eco-friendly runtime.gopark instead. (This was Cherry's excellent idea.) Updates #35652 Fixes #35695 Change-Id: I4b9a841142ee4df0f6b10863cfa0721a7e13b437 Reviewed-on: https://go-review.googlesource.com/c/go/+/207964 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
29 lines
326 B
Go
29 lines
326 B
Go
// compile
|
|
|
|
// Copyright 2019 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 e() {
|
|
for true {
|
|
if true {
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
func g() {}
|
|
|
|
func f() {
|
|
i := 0
|
|
if true {
|
|
i++
|
|
}
|
|
for true {
|
|
continue
|
|
g()
|
|
}
|
|
}
|