| author |  Robbie Lyman <rb.lymn@gmail.com> 2026-06-22 08:49:46-04:00 |
| committer |  Andrew Kelley <andrew@ziglang.org> 2026-06-25 02:09:34+02:00 |
| log | f3544a707941269ec3ed9145ee1432df5a01a10a |
| tree | 364cc3f69d47552d7cacf086ababc054e043979e |
| parent | 92505a7de7f720acc74906a053cd89a33174eb1f |
fix: Allocator contract should allow free on single-pointer-to-array
Currently, when calling `free` a slice created by slicing a pointer with
comptime-known start and end, a compile-time assertion is hit, because
the slicing results in `*[len]T` rather than the expected `[]T`.
This commit allows `Allocator.free` to be called on such pointers as
well.
closes #357121 files changed, 4 insertions(+), 1 deletions(-)
lib- std
lib/std/mem/Allocator.zig+4-1
| ... | ... | @@ -445,7 +445,10 @@ pub fn reallocAdvanced( |
| 445 | 445 | /// To free a single item, see `destroy`. |
| 446 | 446 | pub fn free(self: Allocator, memory: anytype) void { |
| 447 | 447 | const slice_info = @typeInfo(@TypeOf(memory)).pointer; |
| 448 | comptime assert(slice_info.size == .slice); | |
| 448 | if (slice_info.size != .slice) { | |
| 449 | // slicing with comptime-known start and end results in *[len]T, which may be free'd | |
| 450 | comptime assert(slice_info.size == .one and @typeInfo(slice_info.child) == .array); | |
| 451 | } | |
| 449 | 452 | const bytes: []u8 = @ptrCast(@constCast(mem.absorbSentinel(memory))); |
| 450 | 453 | if (bytes.len == 0) return; |
| 451 | 454 | @memset(bytes, undefined); |