Backport "Add clause for protected visibility from package objects" #18148
Conversation
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
We usually have an access rule that the access to a protected member `foo` in class `C` must be from somewhere nested in a subclass of `C`. But that fails if the member is accessed from a package object `p.package`. In that case, the access does not need to be in the same object, it just has to be in package `p`. This clause was previously missing and is now added. Why was this only recently discovered? scala#18057 fixed an issue where toplevel protected members were always accessible because explicit package object prefixes were added after the accessibility check was done, and would re-establish the previous members without doing an accessibility check. The fix was done by adding package objects first, then doing he rest of the checks. But that also means that protected toplevel objects now get checked as members of their synthetic package object instead of as members of their package. The change here also makes specs2 compile again.
odersky
approved these changes
Jul 5, 2023
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Backports #18134
Fixes #18124