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go/test/fixedbugs/issue53982.go
Cuong Manh Le 62654dfd4f cmd/compile: fix wrong typeparams for selector expr with embedded generic type
For selector expression "x.M" where "M" is a promoted method, irgen is using
the type of receiver "x" for determining the typeparams for instantiation.
However, because M is a promoted method, so its associated receiver is
not "x", but "x.T" where "T" is the embedded field of "x". That casues a
mismatch when converting non-shape types arguments.

Fixing it by using the actual receiver which has the method, instead of
using the base receiver.

Fixes #53982

Change-Id: I1836fc422d734df14e9e6664d4bd014503960bfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/419294
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
2022-08-11 19:05:54 +00:00

26 lines
359 B
Go

// build
// Copyright 2022 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 main
type S[K, V any] struct {
E[V]
}
type E[K any] struct{}
func (e E[K]) M() E[K] {
return e
}
func G[K, V any](V) {
_ = (*S[K, V]).M
}
func main() {
G[*int](new(int))
}