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Simplify backtrack #15150

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Merged
epage merged 5 commits into from
Feb 7, 2025
Merged

Simplify backtrack #15150

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3cf5cc3
insurer code is dead by runing tests with a panic! call
Eh2406 Feb 6, 2025
0716b88
move code out of loop
Eh2406 Feb 6, 2025
2cce8b4
deduplicate the check
Eh2406 Feb 6, 2025
a9da3c8
to to too
Eh2406 Feb 6, 2025
8014091
reorganize the loop
Eh2406 Feb 6, 2025
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12 changes: 5 additions & 7 deletions src/cargo/core/resolver/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -960,13 +960,6 @@ fn find_candidate(
};

while let Some(mut frame) = backtrack_stack.pop() {
let next = frame
.remaining_candidates
.next(&mut frame.conflicting_activations, &frame.context);
let Some((candidate, has_another)) = next else {
panic!("why did we save a frame that has no next?");
};

// If all members of `conflicting_activations` are still
// active in this back up we know that we're guaranteed to not actually
// make any progress. As a result if we hit this condition we can
Expand Down Expand Up @@ -999,6 +992,11 @@ fn find_candidate(
}
}

let (candidate, has_another) = frame
.remaining_candidates
.next(&mut frame.conflicting_activations, &frame.context)
.expect("why did we save a frame that has no next?");

return Some((candidate, has_another, frame));
}
None
Expand Down