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There's no reason to do the check_lhs_assignable and RHS check_expr_with_hint in that order, so invert them and use the typeck results to avoid exponential blowup on error.

Fixes #103219

@rustbot rustbot added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Oct 19, 2022
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r? @wesleywiser

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Oct 19, 2022
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lgtm

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@bors r=wesleywiser rollup

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bors commented Oct 19, 2022

📌 Commit d38dc68 has been approved by wesleywiser

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 Oct 19, 2022
bors added a commit to rust-lang-ci/rust that referenced this pull request Oct 19, 2022
…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#103211 (rustdoc: remove class name `location` from sidebar sibling nav)
 - rust-lang#103223 (Use already checked RHS ty for LHS deref suggestions)
 - rust-lang#103237 (Clean up codeblock-tooltip rustdoc-gui test)
 - rust-lang#103239 (Allow #[unstable] impls for fn() with unstable abi.)
 - rust-lang#103246 (Mark `rust-analyzer` as a host-only tool)
 - rust-lang#103257 (rustdoc: move `setting-line` color CSS to settings.css)
 - rust-lang#103258 (Make miri read_dir test a little more robust)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit e500dcb into rust-lang:master Oct 20, 2022
@rustbot rustbot added this to the 1.66.0 milestone Oct 20, 2022
@compiler-errors compiler-errors deleted the deref-sugg-slow branch November 2, 2022 02:54
Aaron1011 pushed a commit to Aaron1011/rust that referenced this pull request Jan 6, 2023
…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#103211 (rustdoc: remove class name `location` from sidebar sibling nav)
 - rust-lang#103223 (Use already checked RHS ty for LHS deref suggestions)
 - rust-lang#103237 (Clean up codeblock-tooltip rustdoc-gui test)
 - rust-lang#103239 (Allow #[unstable] impls for fn() with unstable abi.)
 - rust-lang#103246 (Mark `rust-analyzer` as a host-only tool)
 - rust-lang#103257 (rustdoc: move `setting-line` color CSS to settings.css)
 - rust-lang#103258 (Make miri read_dir test a little more robust)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
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Exponential compilation time on chained "invalid left-hand side of assignment"
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