Rollup of 6 pull requests #146727
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Rollup of 6 pull requests #146727
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but a C-variadic method makes a trait dyn-incompatible. That is because methods from dyn traits, when cast to a function pointer, create a shim. That shim can't really forward the c-variadic arguments.
The logic was, as the removed comments suggest, hackish and meant to implement previous logic that was factored out. The new logic does exactly what the comments say, and is much less surprising.
This should fix triagebot publication of the GitHub release on merge.
…hods, r=workingjubilee c-variadic: allow c-variadic inherent and trait methods tracking issue: rust-lang#44930 Continuing the work of rust-lang#146342, allow inherent and trait methods to be c-variadic. However, a trait that contains a c-variadic method is no longer dyn-compatible. There is, presumably, some way to make c-variadic methods dyn-compatible. However currently, we don't have confidence that it'll work reliably: when methods from a `dyn` object are cast to a function pointer, a `ReifyShim` is created. If that shim is c-variadic, it would need to forward the C variable argument list. That does appear to work, because the `va_list` is not represented in MIR at all in this case, so the registers from the call site are untouched by the shim and can be read by the actual implementation. That just does not seem like a solid implementation. Also, intuitively, why would c-variadic function, primarily needed for FFI, need to be used with `dyn` objects at all? We can revisit this limitation if a need arises. r? `@workingjubilee`
…ge, r=joboet Improve `core::num` coverage This PR improves the `core::num` coverage by adding a new test to `coretests`. r? libs
…n-limit-span, r=oli-obk Add span for struct tail recursion limit error Fixes rust-lang#135629 Changes 1. Add span to RecursionLimitReached 2. Add ObligationCause parameter to struct_tail_raw 4. Update call sites to pass nearby ObligationCause or create one 5. Update affected .stderr
…, r=jdonszelmann Add regression test for issue rust-lang#91831 The requested test for rust-lang#91831. I'm unsure about the filename, the file structure in `tests/ui/lifetimes/lifetime-errors/` isn't entirely clear to me. Any suggestions? Closes rust-lang#91831
…ack, r=lcnr Clean up universe evaluation during type test evaluation The logic was, as the removed comments suggest, hackish and meant to implement previous logic that was factored out. The new logic does exactly what the comments say, and is much less surprising. I'm afraid we may want r? `@lcnr` for this one too. I am sorry, but at least it should be easier to review.
…bzol Include patch in release notes This should fix triagebot publication of the GitHub release on merge.
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Sep 18, 2025
Rollup of 6 pull requests Successful merges: - #146434 (c-variadic: allow c-variadic inherent and trait methods) - #146487 (Improve `core::num` coverage) - #146597 (Add span for struct tail recursion limit error) - #146622 (Add regression test for issue #91831) - #146717 (Clean up universe evaluation during type test evaluation) - #146723 (Include patch in release notes) r? `@ghost` `@rustbot` modify labels: rollup
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Successful merges:
core::numcoverage #146487 (Improvecore::numcoverage)r? @ghost
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