diff options
| -rw-r--r-- | library/core/src/slice/iter.rs | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/library/core/src/slice/iter.rs b/library/core/src/slice/iter.rs index 27fcb8b5332..44ba494340a 100644 --- a/library/core/src/slice/iter.rs +++ b/library/core/src/slice/iter.rs @@ -2423,13 +2423,14 @@ impl<'a, T> Iterator for RChunks<'a, T> { if self.v.is_empty() { None } else { - let chunksz = cmp::min(self.v.len(), self.chunk_size); + let len = self.v.len(); + let chunksz = cmp::min(len, self.chunk_size); // SAFETY: split_at_unchecked just requires the argument be less - // than the length. This could only happen if the expression - // `self.v.len() - chunksz` overflows. This could only happen if - // `chunksz > self.v.len()`, which is impossible as we initialize it - // as the `min` of `self.v.len()` and `self.chunk_size`. - let (fst, snd) = unsafe { self.v.split_at_unchecked(self.v.len() - chunksz) }; + // than the length. This could only happen if the expression `len - + // chunksz` overflows. This could only happen if `chunksz > len`, + // which is impossible as we initialize it as the `min` of `len` and + // `self.chunk_size`. + let (fst, snd) = unsafe { self.v.split_at_unchecked(len - chunksz) }; self.v = fst; Some(snd) } |