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go/test/typeparam/issue51700.go
Wayne Zuo 6f5590edf6 cmd/compile: always write fun[0] in incomplete itab
runtime.getitab need filled fun[0] to identify whether
implemented the interface.

Fixes #51700
Fixes #52228

Change-Id: I0173b98f4e1b45e3a0183a5b60229d289140d1e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/399058
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>
2022-04-12 17:06:19 +00:00

27 lines
413 B
Go

// run
// 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
func f[B any](b B) {
if b1, ok := any(b).(interface{ m1() }); ok {
panic(1)
_ = b1.(B)
}
if b2, ok := any(b).(interface{ m2() }); ok {
panic(2)
_ = b2.(B)
}
}
type S struct{}
func (S) m3() {}
func main() {
f(S{})
}