Fix sparse intersect bug, add more sparse / dense tests

2021-08-26 11:39:13 -07:00
parent 1c1603e0b5
commit d73a169f93
2 changed files with 13 additions and 2 deletions
--- a/compiler/rustc_index/src/bit_set.rs
+++ b/compiler/rustc_index/src/bit_set.rs
@@ -272,7 +272,7 @@ fn dense_sparse_intersect<T: Idx>(
    sparse: &SparseBitSet<T>,
 ) -> (SparseBitSet<T>, bool) {
    let mut sparse_copy = sparse.clone();
-    sparse_intersect(&mut sparse_copy, |el| !dense.contains(*el));
+    sparse_intersect(&mut sparse_copy, |el| dense.contains(*el));
    let n = sparse_copy.len();
    (sparse_copy, n != dense.count())
 }