Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

fix oversight in the min_const_generics checks #93802

Merged
merged 1 commit into from
Feb 10, 2022
Merged

fix oversight in the min_const_generics checks #93802

merged 1 commit into from
Feb 10, 2022

Conversation

lcnr
Copy link
Contributor

@lcnr lcnr commented Feb 9, 2022

@rustbot rustbot added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Feb 9, 2022
@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Feb 9, 2022
@lcnr
Copy link
Contributor Author

lcnr commented Feb 9, 2022 •
edited

One has to try incredibly hard to avoid the current checks. For this to break your code, you need:

  • a trait impl where the trait mentions all used generic parameters, with a self type whose only use generic parameters are in projections <T as Trait<U>>::Assoc (as otherwise T and U would not be bound by the impl)
  • the projection can be normalized even without any bounds on T and U, as these are not provided inside of the anon const.
  • that Self type is used in an anonymous constants

Even one of these three requirements is incredibly unlikely, so I simply consider this to be a bugfix without caring about any potential breakage, cc @nikomatsakis just in case

@nikomatsakis
Copy link
Contributor

seems ok to land as a bug fix and see what the beta crater runs turn up

@BoxyUwU
Copy link
Member

BoxyUwU commented Feb 10, 2022

@bors r+

@bors
Copy link
Contributor

bors commented Feb 10, 2022

📌 Commit 76c562f has been approved by BoxyUwU

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 10, 2022
@matthiaskrgr matthiaskrgr mentioned this pull request Feb 10, 2022
Merged
bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 10, 2022
@bors
Auto merge of rust-lang#93854 - matthiaskrgr:rollup-bh2a85j, r=matthi…
502d6aa 
…askrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#92670 (add kernel target for RustyHermit)
 - rust-lang#93756 (Support custom options for LLVM build)
 - rust-lang#93802 (fix oversight in the `min_const_generics` checks)
 - rust-lang#93808 (Remove first headings indent)
 - rust-lang#93824 (Stabilize cfg_target_has_atomic)
 - rust-lang#93830 (Refactor sidebar printing code)
 - rust-lang#93843 (kmc-solid: Fix wait queue manipulation errors in the `Condvar` implementation)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit f3f41d7 into rust-lang:master Feb 10, 2022
@rustbot rustbot added this to the 1.60.0 milestone Feb 10, 2022
@lcnr lcnr deleted the mcg-woops branch February 10, 2022 15:56
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers

@jackh726 jackh726 jackh726 left review comments

Assignees

@BoxyUwU BoxyUwU

Labels
S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
Projects
None yet
Milestone
1.60.0
Development

Successfully merging this pull request may close these issues.

None yet
7 participants
@lcnr @nikomatsakis @BoxyUwU @bors @jackh726 @rust-highfive @rustbot