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Add regression test for GAT bound mismatched type error - #160103

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rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
zakrad:regr-test-106832
Aug 8, 2026
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Add regression test for GAT bound mismatched type error#160103
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
zakrad:regr-test-106832

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@zakrad

@zakrad zakrad commented Jul 28, 2026

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Adds a regression test for the mismatch type error case of #106832 which is now fixed

Proving `T::Assoc<_>: Sized` while a where-clause bound `T::Assoc<u8>: Sized`
was in scope used to over-eagerly infer the unconstrained argument to `u8`,
causing a spurious "mismatched types" error. It should compile; lock that in.
@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 28, 2026
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rustbot commented Jul 28, 2026

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Thanks for the pull request, and welcome! The Rust Project is excited to review your changes, and you should hear from @tiif (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

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@QuineDot

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The lifetime versions I noted are not fixed, so either #106832 should remain open, or a separate issue for those cases should be created.

@zakrad

zakrad commented Jul 29, 2026

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The lifetime versions I noted are not fixed, so either #106832 should remain open, or a separate issue for those cases should be created.

Thanks for the catch, just edited the description so it does not close the issue.

@tiif

tiif commented Aug 7, 2026

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Thanks!

@bors r+ rollup

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rust-bors Bot commented Aug 7, 2026

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📌 Commit 19fe04b has been approved by tiif

It is now in the queue for this repository.

@rust-bors rust-bors Bot 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 Aug 7, 2026
JonathanBrouwer added a commit to JonathanBrouwer/rust that referenced this pull request Aug 7, 2026
Add regression test for GAT bound mismatched type error

Adds a regression test for the mismatch type error case of rust-lang#106832 which is now fixed
rust-bors Bot pushed a commit that referenced this pull request Aug 7, 2026
…uwer

Rollup of 21 pull requests

Successful merges:

 - #159784 (Hint that memchr returns an in-bounds index)
 - #150885 (Revive L4Re target)
 - #159643 (Add support for splatted function pointers)
 - #160433 (delegation: add support for wrapping of the return value with `From::from`)
 - #160530 (refactor handling of target features in Session)
 - #160606 (bootstrap: Store and use an explicit CheckKind in `check::Rustc`)
 - #160628 (fix ICE in `suggest_add_reference_to_arg` for non-callable items)
 - #160634 (miri subtree update)
 - #157641 (Do not promote extern statics)
 - #158904 (Fix FutureDropPoll shim for by-move async closures)
 - #160103 (Add regression test for GAT bound mismatched type error)
 - #160335 (dlopen offload)
 - #160445 (codegen: classify localized MSVC linker progress as linker_info)
 - #160499 (rustc_resolve: move diagnostic attribute linting to attr parsing)
 - #160504 (cleanup borrowck, improve c-variadic handling)
 - #160577 (expand: Feature gate AST-based attribute macros on expressions and statements)
 - #160587 (Add regression test for associated type outlives bound at call site)
 - #160625 (platform-support/netbsd.md: No longer mention 8.x, due to EoL.)
 - #160636 (derive(Diagnostic): link to proper docs)
 - #160644 (Clean up some manual debug impls)
 - #160649 (move naked function ui tests)
JonathanBrouwer added a commit to JonathanBrouwer/rust that referenced this pull request Aug 7, 2026
Add regression test for GAT bound mismatched type error

Adds a regression test for the mismatch type error case of rust-lang#106832 which is now fixed
rust-bors Bot pushed a commit that referenced this pull request Aug 7, 2026
…uwer

Rollup of 20 pull requests

Successful merges:

 - #159784 (Hint that memchr returns an in-bounds index)
 - #150885 (Revive L4Re target)
 - #159643 (Add support for splatted function pointers)
 - #160433 (delegation: add support for wrapping of the return value with `From::from`)
 - #160530 (refactor handling of target features in Session)
 - #160606 (bootstrap: Store and use an explicit CheckKind in `check::Rustc`)
 - #160628 (fix ICE in `suggest_add_reference_to_arg` for non-callable items)
 - #160634 (miri subtree update)
 - #157641 (Do not promote extern statics)
 - #158904 (Fix FutureDropPoll shim for by-move async closures)
 - #160103 (Add regression test for GAT bound mismatched type error)
 - #160335 (dlopen offload)
 - #160445 (codegen: classify localized MSVC linker progress as linker_info)
 - #160499 (rustc_resolve: move diagnostic attribute linting to attr parsing)
 - #160504 (cleanup borrowck, improve c-variadic handling)
 - #160577 (expand: Feature gate AST-based attribute macros on expressions and statements)
 - #160587 (Add regression test for associated type outlives bound at call site)
 - #160625 (platform-support/netbsd.md: No longer mention 8.x, due to EoL.)
 - #160636 (derive(Diagnostic): link to proper docs)
 - #160644 (Clean up some manual debug impls)
jhpratt added a commit to jhpratt/rust that referenced this pull request Aug 7, 2026
Add regression test for GAT bound mismatched type error

Adds a regression test for the mismatch type error case of rust-lang#106832 which is now fixed
rust-bors Bot pushed a commit that referenced this pull request Aug 7, 2026
…uwer

Rollup of 28 pull requests

Successful merges:

 - #159784 (Hint that memchr returns an in-bounds index)
 - #160673 (Improve `canonical_param_env_cache`)
 - #150885 (Revive L4Re target)
 - #159643 (Add support for splatted function pointers)
 - #160433 (delegation: add support for wrapping of the return value with `From::from`)
 - #160530 (refactor handling of target features in Session)
 - #160606 (bootstrap: Store and use an explicit CheckKind in `check::Rustc`)
 - #160628 (fix ICE in `suggest_add_reference_to_arg` for non-callable items)
 - #160683 (Add regression test for unknown feaeture name reported with other errors)
 - #157641 (Do not promote extern statics)
 - #158904 (Fix FutureDropPoll shim for by-move async closures)
 - #159816 (added note/help about iterator invalidation when mutating a collection inside a for loop)
 - #160103 (Add regression test for GAT bound mismatched type error)
 - #160335 (dlopen offload)
 - #160445 (codegen: classify localized MSVC linker progress as linker_info)
 - #160499 (rustc_resolve: move diagnostic attribute linting to attr parsing)
 - #160504 (cleanup borrowck, improve c-variadic handling)
 - #160577 (expand: Feature gate AST-based attribute macros on expressions and statements)
 - #160587 (Add regression test for associated type outlives bound at call site)
 - #160625 (platform-support/netbsd.md: No longer mention 8.x, due to EoL.)
 - #160633 (delegation: fix determining wrong `FnKind` when delegation is inside const arg)
 - #160636 (derive(Diagnostic): link to proper docs)
 - #160644 (Clean up some manual debug impls)
 - #160649 (move naked function ui tests)
 - #160672 (Improve `MaybeLiveLocals`)
 - #160693 (Add branch config for perf. unrolling in bors)
 - #160696 (rustc_codegen_llvm: handle sm_101* features being an alias)
 - #160706 (renovate: clarify that vulnerability PRs are opened automatically)
@rust-bors
rust-bors Bot merged commit 626d81f into rust-lang:main Aug 8, 2026
13 checks passed
@rustbot rustbot added this to the 1.99.0 milestone Aug 8, 2026
rust-timer added a commit that referenced this pull request Aug 8, 2026
Rollup merge of #160103 - zakrad:regr-test-106832, r=tiif

Add regression test for GAT bound mismatched type error

Adds a regression test for the mismatch type error case of #106832 which is now fixed
pull Bot pushed a commit to LeeeeeeM/miri that referenced this pull request Aug 8, 2026
…uwer

Rollup of 28 pull requests

Successful merges:

 - rust-lang/rust#159784 (Hint that memchr returns an in-bounds index)
 - rust-lang/rust#160673 (Improve `canonical_param_env_cache`)
 - rust-lang/rust#150885 (Revive L4Re target)
 - rust-lang/rust#159643 (Add support for splatted function pointers)
 - rust-lang/rust#160433 (delegation: add support for wrapping of the return value with `From::from`)
 - rust-lang/rust#160530 (refactor handling of target features in Session)
 - rust-lang/rust#160606 (bootstrap: Store and use an explicit CheckKind in `check::Rustc`)
 - rust-lang/rust#160628 (fix ICE in `suggest_add_reference_to_arg` for non-callable items)
 - rust-lang/rust#160683 (Add regression test for unknown feaeture name reported with other errors)
 - rust-lang/rust#157641 (Do not promote extern statics)
 - rust-lang/rust#158904 (Fix FutureDropPoll shim for by-move async closures)
 - rust-lang/rust#159816 (added note/help about iterator invalidation when mutating a collection inside a for loop)
 - rust-lang/rust#160103 (Add regression test for GAT bound mismatched type error)
 - rust-lang/rust#160335 (dlopen offload)
 - rust-lang/rust#160445 (codegen: classify localized MSVC linker progress as linker_info)
 - rust-lang/rust#160499 (rustc_resolve: move diagnostic attribute linting to attr parsing)
 - rust-lang/rust#160504 (cleanup borrowck, improve c-variadic handling)
 - rust-lang/rust#160577 (expand: Feature gate AST-based attribute macros on expressions and statements)
 - rust-lang/rust#160587 (Add regression test for associated type outlives bound at call site)
 - rust-lang/rust#160625 (platform-support/netbsd.md: No longer mention 8.x, due to EoL.)
 - rust-lang/rust#160633 (delegation: fix determining wrong `FnKind` when delegation is inside const arg)
 - rust-lang/rust#160636 (derive(Diagnostic): link to proper docs)
 - rust-lang/rust#160644 (Clean up some manual debug impls)
 - rust-lang/rust#160649 (move naked function ui tests)
 - rust-lang/rust#160672 (Improve `MaybeLiveLocals`)
 - rust-lang/rust#160693 (Add branch config for perf. unrolling in bors)
 - rust-lang/rust#160696 (rustc_codegen_llvm: handle sm_101* features being an alias)
 - rust-lang/rust#160706 (renovate: clarify that vulnerability PRs are opened automatically)
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