remove reliance on old trait solver bug #1
Merged
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Outdated suggestions cannot be applied.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.
Hi there 👋 we discovered this project during a crater run with the next-generation trait solver in rust-lang/rust#133502.
The generic parameter
Q
ofQueryHandler
is underconstrained here as it could be any typeT
with<T as Query>::Refs<'a>
being equal to<Q as Query>::Refs<'a>
. It isn't actually necessary forT
to beQ
itself, e.g. it could also be a type which delegates toQ
sQuery
impl. The current type system implementation unnecessarily constrainedT
to be equal toQ
. This will no longer be the case with the new trait solver.See rust-lang/trait-system-refactor-initiative#168 or the related breakage in
bevy
for more details .I am sorry for the inconvenience and am available in case there are any questions.