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Rollup merge of #124827 - lcnr:generalize-incomplete, r=compiler-errors

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generalize hr alias: avoid unconstrainable infer vars

fixes https://github.com/rust-lang/trait-system-refactor-initiative/issues/108

see inline comments for more details

r? `@compiler-errors` cc `@BoxyUwU`
This commit is contained in:
Matthias Krüger 2024-05-07 18:12:55 +02:00 • committed by GitHub
commit 4a5bf7b06e
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7 changed files with 175 additions and 26 deletions
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5
compiler/rustc_trait_selection/src/solve/inspect/build.rs
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@ -376,7 +376,10 @@ impl<'tcx> ProofTreeBuilder<'tcx> {
(
DebugSolver::GoalEvaluation(goal_evaluation),
DebugSolver::CanonicalGoalEvaluation(canonical_goal_evaluation),
) => goal_evaluation.evaluation = Some(canonical_goal_evaluation),
) => {
let prev = goal_evaluation.evaluation.replace(canonical_goal_evaluation);
assert_eq!(prev, None);
}
_ => unreachable!(),
}
}