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Rollup of 7 pull requests #118019

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workingjubilee and others added 28 commits October 28, 2023 23:10
Tweak wording of module not found in resolve, when the name exists but
belongs to a non-`mod` item.

Fix rust-lang#81232.
…s, r=b-naber

Remove asmjs

Fulfills [MCP 668](rust-lang/compiler-team#668).

`asmjs-unknown-emscripten` does not work as-specified, and lacks essential upstream support for generating asm.js, so it should not exist at all.
Emit smir

This adds ability to `-Zunpretty=smir` and get smir output of a Rust file, this is obliviously pretty basic compared to `mir` output but I think we could iteratively improve it, and even at this state this is useful for us.

r? `@celinval`
When using existing fn as module, don't claim it doesn't exist

Tweak wording of module not found in resolve, when the name exists but belongs to a non-`mod` item.

Fix rust-lang#81232.
…lete, r=lcnr

Don't require intercrate mode for negative coherence

Negative coherence needs to be *sound*, but does not need to be *complete*, since it's looking for the *existence* of a negative goal, not the non-existence of a positive goal.

This removes some trivial and annoying ambiguities when a negative impl has region constraints.

r? lcnr idk if this needs an fcp but if it does, pls kick it off
…-in-coherence, r=lcnr

Ignore but do not assume region obligations from unifying headers in negative coherence

Partly addresses a FIXME that was added in rust-lang#112875. Just as we can throw away the nested trait/projection obligations from unifying two impl headers, we can also just throw away the region obligations too.

I removed part of the FIXME that was incorrect, namely:
> Given that the only region constraints we get are involving inference regions in the root, it shouldn't matter, but still sus.

This is not true when unifying `fn(A)` and `for<'b> fn(&'b B)` which ends up with placeholder region outlives from non-root universes. I'm pretty sure this is okay, though it would be nice if we were to use them as assumptions. See the `explicit` revision of the test I committed, which still fails.

Fixes rust-lang#117986

r? lcnr, feel free to reassign tho.
…-errors

clarify `fn discriminant` guarantees: only free lifetimes may get erased

cc https://github.com/rust-lang/rust/pull/104299/files#r1397082347

don't think this necessitates a backport by itself, but should imo be included if one were to exist.

r? types
@rustbot rustbot added A-testsuite Area: The testsuite used to check the correctness of rustc O-linux Operating system: Linux labels Nov 17, 2023
@rustbot rustbot added O-unix Operating system: Unix-like S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. rollup A PR which is a rollup labels Nov 17, 2023
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@bors r+ rollup=never p=7

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bors commented Nov 17, 2023

📌 Commit e3ec371 has been approved by matthiaskrgr

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Nov 17, 2023
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The job x86_64-gnu-llvm-15 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)
failures:

---- [ui] tests/ui/coherence/negative-coherence-considering-regions.rs#any_lt stdout ----

error in revision `any_lt`: ui test compiled successfully!
status: exit status: 0
command: RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/coherence/negative-coherence-considering-regions.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--cfg" "any_lt" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/coherence/negative-coherence-considering-regions.any_lt" "-A" "unused" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/coherence/negative-coherence-considering-regions.any_lt/auxiliary"
stderr: none


---- [ui] tests/ui/coherence/negative-coherence-placeholder-region-constraints-on-unification.rs#explicit stdout ----
---- [ui] tests/ui/coherence/negative-coherence-placeholder-region-constraints-on-unification.rs#explicit stdout ----

error in revision `explicit`: ui test compiled successfully!
status: exit status: 0
command: RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/coherence/negative-coherence-placeholder-region-constraints-on-unification.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--cfg" "explicit" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/coherence/negative-coherence-placeholder-region-constraints-on-unification.explicit" "-A" "unused" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/coherence/negative-coherence-placeholder-region-constraints-on-unification.explicit/auxiliary"
stderr: none



@matthiaskrgr matthiaskrgr deleted the rollup-l31249i branch March 16, 2024 18:19
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