diff options
| -rw-r--r-- | src/liballoc/vec.rs | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs index 75d54b82076..7dd8895c1ae 100644 --- a/src/liballoc/vec.rs +++ b/src/liballoc/vec.rs @@ -2694,7 +2694,13 @@ impl<'a, T, F> Iterator for DrainFilter<'a, T, F> self.del += 1; return Some(ptr::read(&v[i])); } else if self.del > 0 { - v.swap(i - self.del, i); + let del = self.del; + let src: *const T = &v[i]; + let dst: *mut T = &mut v[i - del]; + // This is safe because self.vec has length 0 + // thus its elements will not have Drop::drop + // called on them in the event of a panic. + ptr::copy_nonoverlapping(src, dst, 1); } } None |