mirror of
https://github.com/golang/go
synced 2024-11-23 13:20:09 -07:00
7b177b1a03
In expandmeth, we call expand1/expand0 to build a list of all candidate methods to promote, and then we use dotpath to prune down which names actually resolve to a promoted method and how. However, previously we still computed "followsptr" based on the expand1/expand0 traversal (which is depth-first), rather than dotpath (which is breadth-first). The result is that we could sometimes end up miscomputing whether a particular promoted method involves a pointer traversal, which could result in bad code generation for method trampolines. Fixes #24547. Change-Id: I57dc014466d81c165b05d78b98610dc3765b7a90 Reviewed-on: https://go-review.googlesource.com/102618 Reviewed-by: Robert Griesemer <gri@golang.org>
47 lines
757 B
Go
47 lines
757 B
Go
// run
|
|
|
|
// Copyright 2018 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.
|
|
|
|
// When computing method sets with shadowed methods, make sure we
|
|
// compute whether a method promotion involved a pointer traversal
|
|
// based on the promoted method, not the shadowed method.
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
)
|
|
|
|
type mystruct struct {
|
|
f int
|
|
}
|
|
|
|
func (t mystruct) String() string {
|
|
return "FAIL"
|
|
}
|
|
|
|
func main() {
|
|
type deep struct {
|
|
mystruct
|
|
}
|
|
s := struct {
|
|
deep
|
|
*bytes.Buffer
|
|
}{
|
|
deep{},
|
|
bytes.NewBufferString("ok"),
|
|
}
|
|
|
|
if got := s.String(); got != "ok" {
|
|
panic(got)
|
|
}
|
|
|
|
var i fmt.Stringer = s
|
|
if got := i.String(); got != "ok" {
|
|
panic(got)
|
|
}
|
|
}
|