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go/test/fixedbugs/issue18392.go
Robert Findley 245e95dfab go/types, types2: don't look up fields or methods when expecting a type
As we have seen many times, the type checker must be careful to avoid
accessing named type information before the type is fully set up. We
need a more systematic solution to this problem, but for now avoid one
case that causes a crash: checking a selector expression on an
incomplete type when a type expression is expected.

For golang/go#57522

Change-Id: I7ed31b859cca263276e3a0647d1f1b49670023a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/461577
Run-TryBot: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
2023-01-11 22:29:34 +00:00

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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 {
// TODO(mdempsky): This should be an error, but this error is
// nonsense. The error should actually mention that there's a
// type loop.
Fn(A.Fn) // ERROR "type A has no method Fn|A.Fn undefined|A.Fn is not a type"
}