mirror of
https://github.com/golang/go
synced 2024-09-05 16:04:50 +00:00
![Matthew Dempsky](/assets/img/avatar_default.png)
The assignment `sink, *(&ok) = y.(int)` should (and does) escape a value to the heap, but this detail is missed because the implicit conversion of the multi-value expression `y.(int)` isn't visible to escape analysis (because it's not inserted until desugaring during walk). For Unified IR, I plan to apply this desugaring earlier (because it's necessary for correct dictionary handling), which means we'll now (correctly) report the heap escape. Due to limitations of the $GOROOT/test harness, the easiest way to handle that GOEXPERIMENT=unified gets this right while GOEXPERIMENT=nounified does not is to split the test case into separate files. Hence this CL. Change-Id: I91f3a6c015cbc646ab018747e152cac2874cf24c Reviewed-on: https://go-review.googlesource.com/c/go/+/415241 Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
26 lines
607 B
Go
26 lines
607 B
Go
// errorcheck -0 -m -l
|
|
//go:build !goexperiment.unified
|
|
// +build !goexperiment.unified
|
|
|
|
// Copyright 2015 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 escape
|
|
|
|
var sink interface{}
|
|
|
|
func dotTypeEscape2() { // #13805, #15796
|
|
{
|
|
i := 0
|
|
j := 0
|
|
var ok bool
|
|
var x interface{} = i // ERROR "i does not escape"
|
|
var y interface{} = j // ERROR "j does not escape"
|
|
|
|
sink = x.(int) // ERROR "x.\(int\) escapes to heap"
|
|
// BAD: should be "y.\(int\) escapes to heap" too
|
|
sink, *(&ok) = y.(int)
|
|
}
|
|
}
|