diff options
| -rw-r--r-- | library/alloc/src/vec.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/library/alloc/src/vec.rs b/library/alloc/src/vec.rs index e7d61dcde45..b21f2a90844 100644 --- a/library/alloc/src/vec.rs +++ b/library/alloc/src/vec.rs @@ -2131,12 +2131,14 @@ where I: Iterator<Item = T> + InPlaceIterable + SourceIter<Source = IntoIter<T>>, { let mut insert_pos = 0; + let original_ptr = iterator.as_inner().buf.as_ptr(); // FIXME: how to drop values written into source when iteration panics? // tail already gets cleaned by IntoIter::drop while let Some(item) = iterator.next() { let source_iter = iterator.as_inner(); let src_buf = source_iter.buf.as_ptr(); + debug_assert_eq!(original_ptr, src_buf); let src_idx = source_iter.ptr; unsafe { let dst = src_buf.offset(insert_pos as isize); |