-
Notifications
You must be signed in to change notification settings - Fork 49
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
go/types, types2: ensure invalid generic types are marked as invalid
When detecting invalid types, we may detect cycles through instances. Ensure that the uninstantiated origin type is also marked invalid. Fixes #56665 Change-Id: Id67653bcb072ac80161dea07d0ced566e61564a8 Reviewed-on: https://go-review.googlesource.com/c/go/+/449275 Run-TryBot: Robert Findley <[email protected]> TryBot-Result: Gopher Robot <[email protected]> Reviewed-by: Robert Griesemer <[email protected]>
- Loading branch information
Showing
4 changed files
with
81 additions
and
9 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,30 @@ | ||
// 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 p | ||
|
||
// Example from the issue: | ||
type A[T any] interface { | ||
*T | ||
} | ||
|
||
type B[T any] interface { | ||
B /* ERROR invalid recursive type */ [*T] | ||
} | ||
|
||
type C[T any, U B[U]] interface { | ||
*T | ||
} | ||
|
||
// Simplified reproducer: | ||
type X[T any] interface { | ||
X /* ERROR invalid recursive type */ [*T] | ||
} | ||
|
||
var _ X[int] | ||
|
||
// A related example that doesn't go through interfaces. | ||
type A2[P any] [10]A2 /* ERROR invalid recursive type */ [*P] | ||
|
||
var _ A2[int] |