c872a1418a
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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| .. | ||
| abi.rs | ||
| assoc.rs | ||
| common_traits.rs | ||
| consts.rs | ||
| errors.rs | ||
| implied_bounds.rs | ||
| instance.rs | ||
| layout.rs | ||
| layout_sanity_check.rs | ||
| lib.rs | ||
| needs_drop.rs | ||
| opaque_types.rs | ||
| representability.rs | ||
| sig_types.rs | ||
| structural_match.rs | ||
| ty.rs | ||