stepping into impls for normalization is unproductive#139900
Merged
bors merged 1 commit intorust-lang:masterfrom Apr 17, 2025
Merged
stepping into impls for normalization is unproductive#139900bors merged 1 commit intorust-lang:masterfrom
bors merged 1 commit intorust-lang:masterfrom
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See the inline comment. This builds on the reasoning from #136824 (https://gist.github.com/lcnr/c49d887bbd34f5d05c36d1cf7a1bf5a5). Fixes rust-lang/trait-system-refactor-initiative#176.
Looking at the end of the gist:
Detecting cases where we accessing the type of an associated item is easy, it's simply when we normalize. I don't yet know how to detect whether we step out of an impl by accessing item bounds. Once we also detect these cases we should be able to soundly support arbitrary coinductive traits. Luckily this does not matter for this PR :>
r? @compiler-errors cc @nikomatsakis