[dependabot]

Bumps bindgen from 0.72.1 to 0.73.2.

Changelog

Sourced from bindgen's changelog.

0.73.2 (2026-09-08)

Added

Changed

Removed

Fixed

• Fixed various regressions with over/underaligned types with respect to 0.72 (#3449,#3453,#3458).
• Fixed a codegen regression with bitfields with enum types in some circumstances (#3455).

Security

0.73.1 (2026-09-05)

Added

Changed

• Widened acceptable prettyplease / syn dependency versions (#3447).

Removed

Fixed

Security

0.73.0 (2026-09-05)

Added

• Add Debug, Clone and Eq traits to ParseCallbacks info types (#3233).
• Include the source location in discovery ParseCallbacks (#3244).
• Report constants and variables in ParseCallbacks::new_item_found (#3249).
• Allow adding custom attributes to extern function blocks (#3257).
• Support new-type-alias constants (#3288, #3390).
• Support nested flexible array members (#3306).
• Add support for custom per-field attributes (#3307).
• Add const-generic bitfield accessors for compile-time optimization (#3325, #3374).
• Allow renaming struct and union fields (#3358).
• Add a libcpp feature to link libclang against libc++ (#3375).
• Prebuilt binaries for aarch64 Linux (#3217).

Changed

• Guarantee opaque type layout across all architectures (#3280).
• Use NonNull for C++ references (#3292).
• Bindings::write now takes impl Write instead of Box<dyn Write> (#3317, #3324).
• Optimize bitfield unit get/set with byte-wise operations (#3325).
• Emit const __BindgenUnionField accessors and comply with Rust 2024 unsafe_op_in_unsafe_fn (#3337).
• Generate a doc comment pointing at the aliased type when a type alias is hidden (#3122).
• dyngen: convert the library path to OsStr before opening it (#3315).
• Return a NoHeadersProvided error instead of generating empty bindings when no input headers are provided (#3391).
• Bump the MSRV to 1.71 (#3401).
• Bump syn to v3 (#3401) and shlex to v2 (#3380).

Removed

• Removed support for generating code for rustc versions < 1.51, along with

... (truncated)

Commits

• 73c69d6 chore: Release
• 77cbc72 codegen: Pad bitfields to field offset if applicable.
• dc61531 ty: More struct layout fixes for overaligned integers / aliases.
• 4348523 codegen: Revert some bitfield codegen changes and silence unnecessary_transmu...
• efb6e0c ty: Use underlying layout of typedefs if available.
• 18fc3ac codegen: Simplify bitfield merging code.
• 910679f codegen: Remove hack that is no longer needed now that we have repr(align) ev...
• 38ebc48 codegen: Don't force padding to be aligned.
• 64f0939 codegen: Don't force padding for over-aligned fields.
• cf8faab codegen: Simplify some conditions about repr(align).
• Additional commits viewable in compare view

Note
Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

[dependabot-pr-auto-approver]

Automatically approved by dependabot auto-approve workflow

[dependabot-pr-auto-approver]

Automatically approved by dependabot auto-approve workflow

[jsturtevant]

@dependabot rebase

[hyperlight-gh-bot]

Benchmark Results

Measured commit: c2d44a84552f
Baseline commit: 076ede448e34

kvm / amd (Linux) (➖ stable)

No benchmark improved or regressed.

Benchmark Results

function_call_codec

	decode_vec_bytes_copy	encode_control
	376.12 µs (➖ 1.01x slower)
byte_chunks		757.08 ns (➖ 1.00x faster)
vec_bytes		577.93 ns (➖ 1.00x faster)

payload_allocation

	slot_pool_segmented
65536	141.61 ns (➖ 1.02x faster)
262144	526.50 ns (➖ 1.01x faster)

sandboxes

	create_initialized_and_drop
medium	81.52 ms (➖ 1.00x faster)

slot_pool

	alloc_dealloc_4096	alloc_dealloc_128	alloc_dealloc_1500
	7.68 ns (➖ 1.00x faster)	7.68 ns (➖ 1.01x faster)	7.68 ns (➖ 1.00x faster)

snapshot_files

	load_snapshot_unverified
small	92.13 µs (➖ 1.01x faster)

virtq_readonly

	slot_pool_segmented	slot_pool_segmented_fragmented
65536	1.92 µs (➖ 1.08x faster)	2.06 µs (➖ 1.07x slower)
262144	7.12 µs (➖ 1.01x faster)	7.38 µs (➖ 1.01x faster)

virtq_readwrite

	slot_pool_segmented	slot_pool_segmented_fragmented
8192	1.02 µs (➖ 1.01x faster)	1.09 µs (➖ 1.00x slower)
65536	6.17 µs (➖ 1.02x faster)	6.18 µs (➖ 1.03x faster)
262144	26.91 µs (➖ 1.03x faster)

kvm / intel (Linux) (➖ stable)

No benchmark improved or regressed.

Benchmark Results

function_call_codec

	decode_vec_bytes_copy	encode_control
	678.02 µs (➖ 1.02x slower)
byte_chunks		673.08 ns (➖ 1.00x slower)
vec_bytes		506.79 ns (➖ 1.00x slower)

payload_allocation

	slot_pool_segmented
65536	169.98 ns (➖ 1.01x faster)
262144	495.13 ns (➖ 1.08x faster)

sandboxes

	create_initialized_and_drop
medium	79.40 ms (➖ 1.03x slower)

slot_pool

	alloc_dealloc_4096	alloc_dealloc_128	alloc_dealloc_1500
	6.80 ns (➖ 1.00x slower)	6.78 ns (➖ 1.00x slower)	6.79 ns (➖ 1.00x faster)

snapshot_files

	load_snapshot_unverified
small	46.08 µs (➖ 1.00x slower)

virtq_readonly

	slot_pool_segmented	slot_pool_segmented_fragmented
65536	2.15 µs (➖ 1.01x slower)	2.14 µs (➖ 1.00x faster)
262144	7.51 µs (➖ 1.00x slower)	7.55 µs (➖ 1.02x slower)

virtq_readwrite

	slot_pool_segmented	slot_pool_segmented_fragmented
8192	739.60 ns (➖ 1.03x slower)	737.17 ns (➖ 1.01x slower)
65536	7.05 µs (➖ 1.00x faster)	7.11 µs (➖ 1.00x slower)
262144	29.34 µs (➖ 1.12x faster)

mshv3 / amd (Linux) (➖ stable)

No benchmark improved or regressed.

Benchmark Results

function_call_codec

	decode_vec_bytes_copy	encode_control
	317.51 µs (➖ 1.00x slower)
byte_chunks		968.22 ns (➖ 1.04x slower)
vec_bytes		708.10 ns (➖ 1.01x faster)

payload_allocation

	slot_pool_segmented
65536	184.31 ns (➖ 1.04x faster)
262144	673.94 ns (➖ 1.00x slower)

sandboxes

	create_initialized_and_drop
medium	62.40 ms (➖ 1.10x faster)

slot_pool

	alloc_dealloc_4096	alloc_dealloc_128	alloc_dealloc_1500
	9.89 ns (➖ 1.00x faster)	9.86 ns (➖ 1.00x faster)	9.87 ns (➖ 1.00x faster)

snapshot_files

	load_snapshot_unverified
small	86.23 µs (➖ 1.00x slower)

virtq_readonly

	slot_pool_segmented	slot_pool_segmented_fragmented
65536	2.46 µs (➖ 1.01x faster)	2.63 µs (➖ 1.03x faster)
262144	9.31 µs (➖ 1.01x slower)	9.08 µs (➖ 1.13x faster)

virtq_readwrite

	slot_pool_segmented	slot_pool_segmented_fragmented
8192	1.26 µs (➖ 1.00x slower)	1.36 µs (➖ 1.05x slower)
65536	7.98 µs (➖ 1.04x faster)	7.93 µs (➖ 1.06x faster)
262144	34.69 µs (➖ 1.05x faster)

mshv3 / intel (Linux) (➖ stable)

No benchmark improved or regressed.

Benchmark Results

function_call_codec

	decode_vec_bytes_copy	encode_control
	814.97 µs (➖ 1.09x slower)
byte_chunks		908.09 ns (➖ 1.04x faster)
vec_bytes		661.63 ns (➖ 1.02x faster)

payload_allocation

	slot_pool_segmented
65536	256.75 ns (➖ 1.00x faster)
262144	667.54 ns (➖ 1.01x faster)

sandboxes

	create_initialized_and_drop
medium	69.36 ms (➖ 1.05x faster)

slot_pool

	alloc_dealloc_4096	alloc_dealloc_128	alloc_dealloc_1500
	8.72 ns (➖ 1.01x slower)	9.91 ns (➖ 1.14x slower)	8.70 ns (➖ 1.01x faster)

snapshot_files

	load_snapshot_unverified
small	46.12 µs (➖ 1.02x faster)

virtq_readonly

	slot_pool_segmented	slot_pool_segmented_fragmented
65536	2.33 µs (➖ 1.01x slower)	2.30 µs (➖ 1.01x faster)
262144	8.10 µs (➖ 1.02x slower)	8.01 µs (➖ 1.00x slower)

virtq_readwrite

	slot_pool_segmented	slot_pool_segmented_fragmented
8192	908.69 ns (➖ 1.02x faster)	906.24 ns (➖ 1.02x faster)
65536	7.44 µs (➖ 1.00x faster)	7.46 µs (➖ 1.01x faster)
262144	40.56 µs (➖ 1.05x slower)

hyperv-ws2025 / amd (Windows) (➖ stable)

No benchmark improved or regressed.

Benchmark Results

function_call_codec

	decode_vec_bytes_copy	encode_control
	1.92 ms (➖ 1.00x slower)
byte_chunks		1.13 µs (➖ 1.00x faster)
vec_bytes		754.26 ns (➖ 1.02x faster)

payload_allocation

	slot_pool_segmented
65536	253.98 ns (➖ 1.09x slower)
262144	790.18 ns (➖ 1.05x faster)

sandboxes

	create_initialized_and_drop
medium	78.96 ms (➖ 1.35x faster)

slot_pool

	alloc_dealloc_4096	alloc_dealloc_128	alloc_dealloc_1500
	10.75 ns (➖ 1.14x faster)	10.62 ns (➖ 1.03x faster)	10.81 ns (➖ 1.00x slower)

snapshot_files

	load_snapshot_unverified
small	632.50 µs (➖ 1.02x slower)

virtq_readonly

	slot_pool_segmented	slot_pool_segmented_fragmented
65536	2.52 µs (➖ 1.04x faster)	2.52 µs (➖ 1.01x faster)
262144	8.51 µs (➖ 1.03x faster)	8.60 µs (➖ 1.03x faster)

virtq_readwrite

	slot_pool_segmented	slot_pool_segmented_fragmented
8192	1.38 µs (➖ 1.14x faster)	1.34 µs (➖ 1.06x faster)
65536	8.92 µs (➖ 1.01x slower)	8.51 µs (➖ 1.02x faster)
262144	37.93 µs (➖ 1.02x faster)

hyperv-ws2025 / intel (Windows) (➖ stable)

No benchmark improved or regressed.

Benchmark Results

function_call_codec

	decode_vec_bytes_copy	encode_control
	2.98 ms (➖ 1.03x slower)
byte_chunks		1.18 µs (➖ 1.03x faster)
vec_bytes		773.23 ns (➖ 1.02x faster)

payload_allocation

	slot_pool_segmented
65536	216.12 ns (➖ 1.03x slower)
262144	750.14 ns (➖ 1.01x slower)

sandboxes

	create_initialized_and_drop
medium	102.86 ms (➖ 1.02x faster)

slot_pool

	alloc_dealloc_4096	alloc_dealloc_128	alloc_dealloc_1500
	10.25 ns (➖ 1.03x slower)	9.77 ns (➖ 1.01x slower)	9.90 ns (➖ 1.03x slower)

snapshot_files

	load_snapshot_unverified
small	525.86 µs (➖ 1.11x faster)

virtq_readonly

	slot_pool_segmented	slot_pool_segmented_fragmented
65536	2.64 µs (➖ 1.08x slower)	2.32 µs (➖ 1.00x slower)
262144	7.69 µs (➖ 1.03x slower)	7.80 µs (➖ 1.02x slower)

virtq_readwrite

	slot_pool_segmented	slot_pool_segmented_fragmented
8192	1.14 µs (➖ 1.07x slower)	1.12 µs (➖ 1.07x faster)
65536	8.56 µs (➖ 1.02x slower)	8.54 µs (➖ 1.02x faster)
262144	42.21 µs (➖ 1.05x slower)

_{Reported by cargo ci bench-report --candidate run:40610414970 --config-file bench_report.toml.}