go/test/fixedbugs/issue18392.go

// errorcheck

// Copyright 2017 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

type A interface { // ERROR "invalid recursive type"
	Fn(A.Fn)
}
cmd/compile: avoid n.Right nil dereference on non-existent interface methods Fixes #18392. Avoid nil dereferencing n.Right when dealing with non-existent self referenced interface methods e.g. type A interface{ Fn(A.Fn) } Instead, infer the symbol name from n.Sym itself. Change-Id: I60d5f8988e7318693e5c8da031285d8d7347b771 Reviewed-on: https://go-review.googlesource.com/34817 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> 2017-01-04 19:21:13 -07:00			`// errorcheck`

			`// Copyright 2017 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`

go/types, types2: replace setDefType with pending type check Given a type definition of the form: type T RHS The setDefType function would set T.fromRHS as soon as we knew its top-level type. For instance, in: type S struct { ... } S.fromRHS is set to a struct type before type-checking anything inside the struct. This permit access to the (incomplete) RHS type in a cyclic type declaration. Accessing this information is fraught (as it's incomplete), but was used for reporting certain types of cycles. This CL replaces setDefType with a check that ensures no value of type T is used before its RHS is set up. This CL is strictly more complete than what setDefType achieved. For instance, it enables correct reporting for the below cycles: type A [unsafe.Sizeof(A{})]int var v any = 42 type B [v.(B)]int func f() C { return C{} } type C [unsafe.Sizeof(f())]int Fixes #76383 Fixes #76384 Change-Id: I9dfab5b708013b418fa66e43362bb4d8483fedec Reviewed-on: https://go-review.googlesource.com/c/go/+/724140 Auto-Submit: Mark Freeman <markfreeman@google.com> Reviewed-by: Robert Griesemer <gri@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> 2025-11-24 17:04:49 -05:00			`type A interface { // ERROR "invalid recursive type"`
			`Fn(A.Fn)`
cmd/compile: avoid n.Right nil dereference on non-existent interface methods Fixes #18392. Avoid nil dereferencing n.Right when dealing with non-existent self referenced interface methods e.g. type A interface{ Fn(A.Fn) } Instead, infer the symbol name from n.Sym itself. Change-Id: I60d5f8988e7318693e5c8da031285d8d7347b771 Reviewed-on: https://go-review.googlesource.com/34817 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> 2017-01-04 19:21:13 -07:00			`}`