diff options
| -rw-r--r-- | library/alloc/src/lib.rs | 1 | ||||
| -rw-r--r-- | library/alloc/src/vec/mod.rs | 8 |
2 files changed, 7 insertions, 2 deletions
diff --git a/library/alloc/src/lib.rs b/library/alloc/src/lib.rs index 4290bb7a8a9..947df24d44f 100644 --- a/library/alloc/src/lib.rs +++ b/library/alloc/src/lib.rs @@ -153,6 +153,7 @@ #![feature(try_trait_v2)] #![feature(try_with_capacity)] #![feature(tuple_trait)] +#![feature(ub_checks)] #![feature(unicode_internals)] #![feature(unsize)] #![feature(unwrap_infallible)] diff --git a/library/alloc/src/vec/mod.rs b/library/alloc/src/vec/mod.rs index a4741f30fa5..da3d3596d19 100644 --- a/library/alloc/src/vec/mod.rs +++ b/library/alloc/src/vec/mod.rs @@ -64,7 +64,7 @@ use core::mem::{self, ManuallyDrop, MaybeUninit, SizedTypeProperties}; use core::ops::{self, Index, IndexMut, Range, RangeBounds}; use core::ptr::{self, NonNull}; use core::slice::{self, SliceIndex}; -use core::{fmt, intrinsics}; +use core::{fmt, intrinsics, ub_checks}; #[stable(feature = "extract_if", since = "1.87.0")] pub use self::extract_if::ExtractIf; @@ -1950,7 +1950,11 @@ impl<T, A: Allocator> Vec<T, A> { #[inline] #[stable(feature = "rust1", since = "1.0.0")] pub unsafe fn set_len(&mut self, new_len: usize) { - debug_assert!(new_len <= self.capacity()); + ub_checks::assert_unsafe_precondition!( + check_library_ub, + "Vec::set_len requires that new_len <= capacity()", + (new_len: usize = new_len, capacity: usize = self.capacity()) => new_len <= capacity + ); self.len = new_len; } |