diff options
| -rw-r--r-- | compiler/rustc_index/src/bit_set.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/compiler/rustc_index/src/bit_set.rs b/compiler/rustc_index/src/bit_set.rs index 664b77fd49e..38e2dbbde7d 100644 --- a/compiler/rustc_index/src/bit_set.rs +++ b/compiler/rustc_index/src/bit_set.rs @@ -179,7 +179,12 @@ impl<T: Idx> BitSet<T> { /// Insert `elem`. Returns whether the set has changed. #[inline] pub fn insert(&mut self, elem: T) -> bool { - assert!(elem.index() < self.domain_size); + assert!( + elem.index() < self.domain_size, + "inserting element at index {} but domain size is {}", + elem.index(), + self.domain_size, + ); let (word_index, mask) = word_index_and_mask(elem); let word_ref = &mut self.words[word_index]; let word = *word_ref; |