| commit | 1a2ca95ad2d0e6599ab8b9772c30afbb743abc89 | [log] [tgz] |
|---|---|---|
| author | Robert Findley <rfindley@google.com> | Sat Jun 04 17:01:47 2022 -0400 |
| committer | Robert Findley <rfindley@google.com> | Thu Jun 09 01:07:11 2022 +0000 |
| tree | 62949bd633bf567e11150c2fab8976eb6a750bf9 | |
| parent | b51d44c6dd9d6f3ac3e1d275bc118aae23a5a482 [diff] |
go/types, types2: only set instance context if packages match In CL 404885, we avoid infinite expansion of type instances by sharing a context between the expanding type and new instances created during expansion. This ensures that we do not create an infinite number of identical but distinct instances in the presence of reference cycles. This pins additional memory to the new instance, but no more (approximately) than would be pinned by the original expanding instance. However, we can do better: since type cycles are only possible within a single package, we only need to share the local context if the two types are in the same package. This reduces the scope of the shared local context, and in particular can avoid pinning the package of the expanding type to the package of the newly created instance. Updates #52728 Change-Id: Iad2c85f4ecf60125f1da0ba22a7fdec7423e0338 Reviewed-on: https://go-review.googlesource.com/c/go/+/410416 Run-TryBot: Robert Findley <rfindley@google.com> Reviewed-by: Robert Griesemer <gri@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
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