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Re-implement a type-size based limit r? lcnr This PR reintroduces the type length limit added in #37789, which was accidentally made practically useless by the caching changes to `Ty::walk` in #72412, which caused the `walk` function to no longer walk over identical elements. Hitting this length limit is not fatal unless we are in codegen -- so it shouldn't affect passes like the mir inliner which creates potentially very large types (which we observed, for example, when the new trait solver compiles `itertools` in `--release` mode). This also increases the type length limit from `1048576 == 2 ** 20` to `2 ** 24`, which covers all of the code that can be reached with craterbot-check. Individual crates can increase the length limit further if desired. Perf regression is mild and I think we should accept it -- reinstating this limit is important for the new trait solver and to make sure we don't accidentally hit more type-size related regressions in the future. Fixes #125460 |
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| .. | ||
| error_reporting | ||
| query | ||
| select | ||
| specialize | ||
| auto_trait.rs | ||
| coherence.rs | ||
| const_evaluatable.rs | ||
| engine.rs | ||
| fulfill.rs | ||
| misc.rs | ||
| mod.rs | ||
| normalize.rs | ||
| object_safety.rs | ||
| outlives_bounds.rs | ||
| project.rs | ||
| structural_match.rs | ||
| structural_normalize.rs | ||
| util.rs | ||
| vtable.rs | ||
| wf.rs | ||