Add test for dynamic dispatch + Pin::new soundness #125072
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jhpratt
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May 14, 2024
…=jhpratt Add test for dynamic dispatch + Pin::new soundness While working on [the `#[derive(SmartPointer)]` RFC][1], I realized that the soundness of <code>impl [DispatchFromDyn](https://doc.rust-lang.org/stable/std/ops/trait.DispatchFromDyn.html) for [Pin](https://doc.rust-lang.org/stable/std/pin/struct.Pin.html)</code> relies on the restriction that you can't implement [`Unpin`](https://doc.rust-lang.org/stable/std/marker/trait.Unpin.html) for trait objects. As far as I can tell, the relevant error exists to solve some unrelated issues with coherence. To avoid cases where `Pin` is made unsound due to changes in the coherence-related errors, add a test that verifies that unsound use of `Pin` and `DispatchFromDyn` does not become allowed in the future. [1]: rust-lang/rfcs#3621
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Rollup of 5 pull requests Successful merges: - rust-lang#116675 ([ptr] Document maximum allocation size) - rust-lang#124807 (Migrate `run-make/rustdoc-io-error` to `rmake.rs`) - rust-lang#124997 (Fix ICE while casting a type with error) - rust-lang#125072 (Add test for dynamic dispatch + Pin::new soundness) - rust-lang#125090 (Migrate fuchsia docs from `pm` to `ffx`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 4 pull requests Successful merges: - rust-lang#116675 ([ptr] Document maximum allocation size) - rust-lang#124997 (Fix ICE while casting a type with error) - rust-lang#125072 (Add test for dynamic dispatch + Pin::new soundness) - rust-lang#125090 (Migrate fuchsia docs from `pm` to `ffx`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#125072 - Darksonn:pin-dyn-dispatch-sound, r=jhpratt Add test for dynamic dispatch + Pin::new soundness While working on [the `#[derive(SmartPointer)]` RFC][1], I realized that the soundness of <code>impl [DispatchFromDyn](https://doc.rust-lang.org/stable/std/ops/trait.DispatchFromDyn.html) for [Pin](https://doc.rust-lang.org/stable/std/pin/struct.Pin.html)</code> relies on the restriction that you can't implement [`Unpin`](https://doc.rust-lang.org/stable/std/marker/trait.Unpin.html) for trait objects. As far as I can tell, the relevant error exists to solve some unrelated issues with coherence. To avoid cases where `Pin` is made unsound due to changes in the coherence-related errors, add a test that verifies that unsound use of `Pin` and `DispatchFromDyn` does not become allowed in the future. [1]: rust-lang/rfcs#3621
celinval
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Update Rust toolchain from nightly-2024-05-14 to nightly-2024-05-15 without any other source changes. This is an automatically generated pull request. If any of the CI checks fail, manual intervention is required. In such a case, review the changes at https://github.com/rust-lang/rust from rust-lang@ab14f94 up to rust-lang@8387315. The log for this commit range is: rust-lang@8387315ab3 Auto merge of rust-lang#125125 - lovesegfault:opt-dist-specify-rustc-perf, r=Mark-Simulacrum rust-lang@c3c9783de2 feat(tools/opt-dist): allow local builds to specify a rustc-perf checkout rust-lang@ac385a5af6 Auto merge of rust-lang#125120 - compiler-errors:rollup-mnjybwv, r=compiler-errors rust-lang@31016d5879 Rollup merge of rust-lang#125118 - GuillaumeGomez:cleanup-run-make, r=jieyouxu rust-lang@d59f430eec Rollup merge of rust-lang#125100 - compiler-errors:faster, r=nnethercote rust-lang@712e7c37f7 Rollup merge of rust-lang#125088 - compiler-errors:uplift-alias-ty, r=lcnr rust-lang@8c64acdbdc Rollup merge of rust-lang#125080 - bvanjoi:fix-124946, r=nnethercote rust-lang@844c7e826e Rollup merge of rust-lang#125047 - Oneirical:test5, r=jieyouxu rust-lang@0458d8a53b Rollup merge of rust-lang#124844 - compiler-errors:shadow-probe, r=lcnr rust-lang@36287830a2 Rollup merge of rust-lang#119838 - joshtriplett:style-guide-binop-indent, r=compiler-errors rust-lang@ade33b02f2 only find segs chain for missing methods when no available candidates rust-lang@bdfd941f4d Auto merge of rust-lang#123816 - tgross35:f16-f128-mangling, r=michaelwoerister rust-lang@f97d915173 Use new utility functions/methods in run-make tests rust-lang@792a9bdd4b Enable v0 mangling tests and add checks for `f16`/`f128` rust-lang@809b84edba Add v0 symbol mangling for `f16` and `f128` rust-lang@31026b7fe3 Auto merge of rust-lang#125023 - morr0ne:linux-none-target, r=Nilstrieb rust-lang@68407f9049 fix typo in x86_64-unknown-linux-none docs rust-lang@c45e831d8f Auto merge of rust-lang#124228 - compiler-errors:lint-overcaptures, r=oli-obk rust-lang@58426f4a5b Auto merge of rust-lang#125026 - Oneirical:clink-tests, r=jieyouxu rust-lang@e098eb14ae Wording improvement rust-lang@e2d9c0d938 Fix missing word rust-lang@57c32a193f style-guide: When breaking binops handle multi-line first operand better rust-lang@dbd2ca6478 Use a proper probe for shadowing impl rust-lang@052de1da4f And finally add tests rust-lang@1529c661e4 Warn against redundant use<...> rust-lang@f3fb727b08 Don't suggest using use<> syntax to capture APITs rust-lang@6afe1352d9 Suggest adding use<> syntax rust-lang@554becc180 Add some commenting rust-lang@d57e57ca1f Implement initial IMPL_TRAIT_OVERCAPTURES lint rust-lang@8f97a2588c Add test to make sure suggestions are still quick rust-lang@fba5f44bd8 Auto merge of rust-lang#125098 - jhpratt:rollup-2qm4gga, r=jhpratt rust-lang@45b50d303c lto function, static_library call, rename rust-lang@9f8cdb286e Remove to_term rust-lang@1ad28a6f53 Uplift AliasTy rust-lang@812f89728a fix fmt rust-lang@2e4c90c3f7 Don't do post-method-probe error reporting steps if we're in a suggestion rust-lang@32d74f1800 Rollup merge of rust-lang#125090 - erickt:bump-fuchsia, r=tmandry rust-lang@209703af85 Rollup merge of rust-lang#125072 - Darksonn:pin-dyn-dispatch-sound, r=jhpratt rust-lang@18d9c039bb Rollup merge of rust-lang#124997 - gurry:124848-ice-should-be-sized, r=Nadrieril rust-lang@74a78af0e2 Rollup merge of rust-lang#116675 - joshlf:patch-10, r=scottmcm rust-lang@9105c57b7f Auto merge of rust-lang#124256 - nnethercote:rm-NtIdent-NtLifetime, r=petrochenkov rust-lang@34582118af Auto merge of rust-lang#125076 - compiler-errors:alias-term, r=lcnr rust-lang@95e519ecbf Remove `NtIdent` and `NtLifetime`. rust-lang@fa84018c2e Apply nits rust-lang@58ee9192e0 Migrate fuchsia docs from `pm` to `ffx` rust-lang@293b5cb1ca [ptr] Document maximum allocation size rust-lang@3bcdf3058e split out AliasTy -> AliasTerm rust-lang@b3a78c1d09 Add test for dynamic dispatch + Pin::new soundness rust-lang@9a63a42cb7 Remove a `Span` from `TokenKind::Interpolated`. rust-lang@71fd2cf5b4 fix function call and import rust-lang@a1b5ea0cc2 make tidy happy rust-lang@f2de5fb2ae rewrite issue-14500 to rmake rust-lang@a6f237ca85 docs: fix typo in platform-support docs rust-lang@923cdb35aa test: Add assembly tests for x86_64-unknown-linux-none target rust-lang@10c358f111 Make tidy happy rust-lang@e37d2989c1 remove trailing whitespace rust-lang@a2e7e79a13 Port c-link-to-rust-va-list-fn to Rust rust-lang@9cf080099d docs: Document x86_64-unknown-linux-none target rust-lang@a3ef01b1fc Add x86_64-unknown-linux-none target rust-lang@fb619ec208 FIx ICE while casting a type with error Co-authored-by: tautschnig <1144736+tautschnig@users.noreply.github.com>
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While working on the
#[derive(SmartPointer)]RFC, I realized that the soundness ofimpl DispatchFromDyn for Pinrelies on the restriction that you can't implementUnpinfor trait objects.As far as I can tell, the relevant error exists to solve some unrelated issues with coherence. To avoid cases where
Pinis made unsound due to changes in the coherence-related errors, add a test that verifies that unsound use ofPinandDispatchFromDyndoes not become allowed in the future.