Assert that explicit_super_predicates_of and explicit_item_super_predicates truly only contains bounds for the type itself
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explicit_super_predicates_of and explicit_item_super_predicates truly only bounds for the type itself
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explicit_super_predicates_of and explicit_item_super_predicates truly only bounds for the type itselfexplicit_super_predicates_of and explicit_item_super_predicates truly only contains bounds for the type itself
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…ly only bounds for the type itself
…ally collecting implied bounds, not super bounds
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@bors r=fee1-dead,fmease rollup |
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…e1-dead,fmease Assert that `explicit_super_predicates_of` and `explicit_item_super_predicates` truly only contains bounds for the type itself We distinguish _implied_ predicates (anything that is implied from elaborating a trait bound) from _super_ predicates, which are are the subset of implied predicates that share the same self type as the trait predicate we're elaborating. This was originally done in rust-lang#107614, which fixed a large class of ICEs and strange errors where the compiler expected the self type of a trait predicate not to change when elaborating super predicates. Specifically, super predicates are special for various reasons: they're the valid candidates for trait upcasting, are the only predicates we elaborate when doing closure signature inference, etc. So making sure that we get this list correct and don't accidentally "leak" any other predicates into this list is quite important. This PR adds some debug assertions that we're in fact not doing so, and it fixes an oversight in the effect desugaring rework.
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…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#127766 (add `extern "C-cmse-nonsecure-entry" fn` ) - rust-lang#129629 (Implement Return Type Notation (RTN)'s path form in where clauses) - rust-lang#130246 (rustc_expand: remember module `#[path]`s during expansion) - rust-lang#130408 (Avoid re-validating UTF-8 in `FromUtf8Error::into_utf8_lossy`) - rust-lang#130651 (Add --enable-profiler to armhf dist) - rust-lang#130653 (ABI compatibility: mention Result guarantee) - rust-lang#130665 (Prevent Deduplication of `LongRunningWarn`) - rust-lang#130666 (Assert that `explicit_super_predicates_of` and `explicit_item_super_predicates` truly only contains bounds for the type itself) - rust-lang#130667 (compiler: Accept "improper" ctypes in extern "rust-cold" fn) r? `@ghost` `@rustbot` modify labels: rollup
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…mpiler-errors Rollup of 8 pull requests Successful merges: - rust-lang#127766 (add `extern "C-cmse-nonsecure-entry" fn` ) - rust-lang#129629 (Implement Return Type Notation (RTN)'s path form in where clauses) - rust-lang#130408 (Avoid re-validating UTF-8 in `FromUtf8Error::into_utf8_lossy`) - rust-lang#130651 (Add --enable-profiler to armhf dist) - rust-lang#130653 (ABI compatibility: mention Result guarantee) - rust-lang#130666 (Assert that `explicit_super_predicates_of` and `explicit_item_super_predicates` truly only contains bounds for the type itself) - rust-lang#130667 (compiler: Accept "improper" ctypes in extern "rust-cold" fn) - rust-lang#130673 (Parser: recover from `:::` to `::`) r? `@ghost` `@rustbot` modify labels: rollup
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…mpiler-errors Rollup of 8 pull requests Successful merges: - rust-lang#127766 (add `extern "C-cmse-nonsecure-entry" fn` ) - rust-lang#129629 (Implement Return Type Notation (RTN)'s path form in where clauses) - rust-lang#130408 (Avoid re-validating UTF-8 in `FromUtf8Error::into_utf8_lossy`) - rust-lang#130651 (Add --enable-profiler to armhf dist) - rust-lang#130653 (ABI compatibility: mention Result guarantee) - rust-lang#130666 (Assert that `explicit_super_predicates_of` and `explicit_item_super_predicates` truly only contains bounds for the type itself) - rust-lang#130667 (compiler: Accept "improper" ctypes in extern "rust-cold" fn) - rust-lang#130673 (Parser: recover from `:::` to `::`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#130666 - compiler-errors:super-bounds, r=fee1-dead,fmease Assert that `explicit_super_predicates_of` and `explicit_item_super_predicates` truly only contains bounds for the type itself We distinguish _implied_ predicates (anything that is implied from elaborating a trait bound) from _super_ predicates, which are are the subset of implied predicates that share the same self type as the trait predicate we're elaborating. This was originally done in rust-lang#107614, which fixed a large class of ICEs and strange errors where the compiler expected the self type of a trait predicate not to change when elaborating super predicates. Specifically, super predicates are special for various reasons: they're the valid candidates for trait upcasting, are the only predicates we elaborate when doing closure signature inference, etc. So making sure that we get this list correct and don't accidentally "leak" any other predicates into this list is quite important. This PR adds some debug assertions that we're in fact not doing so, and it fixes an oversight in the effect desugaring rework.
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We distinguish implied predicates (anything that is implied from elaborating a trait bound) from super predicates, which are are the subset of implied predicates that share the same self type as the trait predicate we're elaborating. This was originally done in #107614, which fixed a large class of ICEs and strange errors where the compiler expected the self type of a trait predicate not to change when elaborating super predicates.
Specifically, super predicates are special for various reasons: they're the valid candidates for trait upcasting, are the only predicates we elaborate when doing closure signature inference, etc. So making sure that we get this list correct and don't accidentally "leak" any other predicates into this list is quite important.
This PR adds some debug assertions that we're in fact not doing so, and it fixes an oversight in the effect desugaring rework.