fix(deps): update rust crate wasmtime to v40

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
wasmtime	dependencies	major	33.0.0 → 40.0.0

---

Release Notes

bytecodealliance/wasmtime (wasmtime)

v40.0.0

Compare Source

40.0.0

Released 2025-12-20.

Added

• WASIp3 support for wasi:http now implements Response::from_http to convert
  from standard Rust types to WASI types.
  #​12063

• Cranelift now supports a "patchable" ABI which has a maximum number of
  arguments and clobbers no registers. This is paired as well with a new
  patchable_call instruction which supports being turned into NOPs at runtime.
  #​12061
  #​12101

Changed

• Support for the WebAssembly threads proposal is now classified as tier 2 by
  default. Additionally creation of SharedMemory is disabled by deafult behind
  a new config knob/CLI flag.
  #​12036

• A variety of peephole-style optimizations have been added to Cranelift's
  optimization passes.
  #​11994
  #​11995
  #​11996
  #​11997
  #​11998
  #​11999
  #​12000
  #​12006
  #​12008

• Component host functions have been slightly optimized to remove an Arc clone
  and reduce contention.
  #​11987

• Support for component-model-async has been updated to account for the
  changes specified in WebAssembly/component-model#578.
  This means that historical binaries using WASIp3, for example, are no longer
  valid. Recompilation of historical components will be required and
  source-level changes may also be required in some circumstances.
  #​12031
  #​12043

• The UnsyncBoxBody type is now used everywhere in wasmtime-wasi-http instead
  of just in the wasip3 support.
  #​12060

• Initial groundwork for gracefully handling OOM (e.g. returning an error
  instead of aborting) has been added.
  #​12070
  #​12089

• Wasmtime will create a private copy of code memory when guest debugging is
  enabled to assist with modifying code when adding/removing breakpoints.
  #​12051

• The ResourceTable type will no longer use Tombstone when compiled in debug
  mode.
  #​12114

• Intra-component future/stream reads/writes will now trap instead of
  accidentally being allowed.
  #​12117

• Cranelift optimization rules have been tweaked after it was discovered that
  they could pessimize code containing long chains of computations.
  #​12116

Fixed

• Compilation of i8x16.popcnt has been fixed in Winch for some potential
  inputs.
  #​12010

• A panic in Instance::prepare_call for some component-model-async situations
  has been fixed.
  #​12054

• An off-by-one error for lifting/lowering enums/variants with 255 cases has
  been fixed.
  #​12066

• Restarting the read of a host future after cancellation has been fixed.
  #​12093

• Compilation for OpenBSD on x86_64 has been fixed.
  #​12097

• Components containing a module type which exoprts a tag are now supported.
  #​12125

v39.0.1

Compare Source

39.0.1

Released 2025-11-24.

Fixed

• Compiling the debug feature without the gc feature enabled has been fixed.
  #​12074

v39.0.0

Compare Source

39.0.0

Released 2025-11-20.

Added

• Initial work has begun to support WebAssembly-level debugging natively in
  Wasmtime. This is intended to complement today's preexisting DWARF-level
  debugging, but this work will be portable and operate at the WebAssembly level
  of abstraction rather than the machine-level. Note that this work is not yet
  complete at this time but is expected to get filled out over the coming
  releases.
  #​11768
  #​11769
  #​11873
  #​11892
  #​11895

• The pooling allocator now exposes more metrics about unused slots.
  #​11789

• The Wizer and component-init projects have been merged into Wasmtime under
  a new wasmtime wizer CLI subcommand and wasmtime-wizer crate. This is
  mostly a drop-in replacement for both with a minor caveat that the
  initialization function is now called wizer-initialize instead of
  wizer.initialize to be compatible with components.
  #​11805
  #​11851
  #​11853
  #​11855
  #​11857
  #​11863
  #​11866
  #​11867
  #​11877
  #​11876
  #​11878
  #​11891
  #​11897
  #​11898

• The Config::wasm_feature method is now public.
  #​11812

• Enabling the wasm exceptions proposal is now exposed in the C API.
  #​11861

• The wasmtime crate now has a custom-sync-primitives Cargo feature which
  enables using custom synchronization primitives defined by the embedder. This
  is useful in no_std targets where the default panic-on-contention primitives
  are not appropriate.
  #​11836

• Wasmtime now supports unsafe intrinsics to be used for compile-time builtins.
  This can be used to provide give low-level access to host APIs/memory to a
  guest program in a controlled fashion.
  #​11825
  #​11918

• The signals_based_traps configuration option is now exposed in the C API.
  #​11879

• A new EqRef::from_i31 function has been added.
  #​11884

• The wasmtime serve subcommand will, by default, now reuse instances when
  used with WASIp3 components. This increases throughput and additionally
  showcases the concurrent features of WASIp3. This can be opted-out-of on the
  CLI as well.
  #​11807

• The C++ API for components has been filled out and implemented.
  #​11880
  #​11889
  #​11988

• A new ResourceDynamic type, similar to Resource<T>, has been added to
  support host resources that have a dynamic tag at runtime rather than a
  statically known tag at compile time. This is then used to implement resources
  in the C/C++ API as well.
  #​11885
  #​11920

• The C/C++ API of Wasmtime now supports the custom-page-sizes wasm proposal.
  #​11890

• Initial support has been added for the cooperative multithreading component
  model proposal in Wasmtime, built on async primitives.
  #​11751

• The epoch_deadline_callback Rust API has been bound in C++.
  #​11945

• A new Request::into_http helper has been added to the WASIp3 implementation
  of wasi:http.
  #​11843

• A define_unknown_imports_as_traps function has been added to the C API.
  #​11962

• A callback-based implementation of stdout and stderr has been added to the
  C API for WASI configuration.
  #​11965

Changed

• Running async functions in the component model now operates at the
  Store-level of abstraction rather than an Instance.
  #​11796

• The wasmtime serve subcommand no longer mistakenly spawns an epoch thread
  per-request and instead uses a single epoch thread.
  #​11817

• The component-model-async Cargo feature is now on-by-default. Note that it
  is still gated at runtime by default. Also note that Wasmtime 39 does not include
  #​12031 which means
  that components using async produced with the latest wasm-tools will not run
  in Wasmtime 39. To run async components it's recommended to pin to a
  historical version of wasm-tools and guest toolchains for now.
  #​11822

• Bindings generated by wiggle no longer use async_trait.
  #​11839

• Wasmtime's documentation now has an example of a plugin system using Wasmtime.
  #​11848

• Profiling with perfmap or jitdump now uses O_APPEND to be more amenable to
  other engines in the same process also using perfmap/jitdump.
  #​11865

• The wasmtime-wasi-http crate now uses UnsyncBoxBody to clarify that Sync
  is not required.
  #​11941

• A . character is now used instead of / int he bindgen! macro to separate
  interface members.
  #​11947

• The func_new function for component linkers now provides the type to the
  callee so it knows the type that the component that imported it is using.
  #​11944

• The component::Func type now has a type accessor and the old params/result
  accessors were deleted.
  #​11943

• Wasmtime now requires Rust 1.89.0 or later to compile.
  #​11959

Fixed

• Some panics handling shapes of components with resources in various locations
  has been fixed.
  #​11798

• Bitwise float operations in Cranelift have been fixed on aarch64.
  #​11811

• An off-by-one in the bounds check of wasm atomic operations has been fixed.
  #​11977

• Bounds-check elision now happens again with 4 GiB guard pages.
  #​11973

v38.0.4

Compare Source

38.0.4

Released 2025-11-11.

Fixed

• Prevent using shared memories with Memory.
  CVE-2025-64345

v38.0.3

Compare Source

38.0.3

Released 2025-10-24.

Fixed

• Fix possible host crash with host-to-wasm component intrinsics
  CVE-2025-62711

v38.0.2: : Release Wasmtime 38.0.2 (#​11903)

Compare Source

38.0.2

Released 2025-10-21.

Changed

• This repository is attempting to start out using GitHub's "Immutable Releases"
  feature with this release, and this'll be the first release, assuming all goes
  well, that has this enabled.
  #​11901

Fixed

• Fix compatibility with the Go runtime on Windows for exceptions.
  #​11892

v38.0.1

38.0.1

Released 2025-10-20.

Fixed

• Fixed some automation that went wrong with the 38.0.0 release.

v37.0.3

Compare Source

37.0.3

Released 2025-11-11.

Fixed

• Prevent using shared memories with Memory.
  CVE-2025-64345

v37.0.2

Compare Source

37.0.2

Released 2025-10-07.

Fixed

• Fix a memory leak in the C API when using anyref or externref.
  CVE-2025-61670.

v37.0.1

Compare Source

37.0.1

Released 2025-09-23.

Fixed

• Cranelift's cranelift-jit crate now properly applies relocations to ADRP
  instructions on aarch64; a zero-extension on the offset was fixed to properly
  sign-extend instead.
  #​11734

v37.0.0

Compare Source

37.0.0

Released 2025-09-20.

Added

• Wasmtime now fully implements the WebAssembly exception-handling proposal.
  Support is still disabled by default but is ready for testing. The proposal
  will be enabled by default in a future release of Wasmtime.
  #​11326

• An initial implementation of WASIp3 is available for the 0.3.0-rc-2025-08-15
  tag made for the WASIp3 release. Note that this is not production ready yet
  but is an excellent time to start kicking the tires in preparation for an
  upcoming officialy WASIp3 0.3.0 release. Users of the CLI can opt-in with
  -Sp3 -Wcomponent-model-async.
  #​11406
  #​11423
  #​11443

• Wasmtime has initial support for the Linux PAGEMAP_SCAN ioctl which can
  greatly improve instantiation throughput in scenarios with a high number of
  instantiations and short instance lifetime. This support is disabled by
  default but will likely be enabled by default in a future release.
  #​11372
  #​11433

• GC support can now be configured in Config and not only through crate
  features through Config::gc_support.
  #​11463

• Wasmtime now supports reading metrics of the pooling allocator at runtime.
  #​11490

• The ManuallyRooted type is now replaced with OwnedRooted which is intended
  to make management of GC object lifetimes on the host easier.
  #​11514

• Wasmtime's documentation of the C++ embedding API and examples has been
  expanded.
  #​11569

• Wasmtime's support for the stack-switching WebAssembly proposal continues to
  progress on x86_64 Linux.
  #​11003

Changed

• The preview0 and preview1 modules and features in the wasmtime-wasi
  crate are now called p0 and p1.
  #​11380

• Release artifacts for the C API are now unconditionally built with unwind
  tables.
  #​11383

• Wasmtime now requires Rust 1.87.0 or later to build.
  #​11396

• The component-model-async gated AbortHandle is now named JoinHandle.
  #​11414

• Wasmtime's internal implementation details are now async in many more
  locations to help ensure the implementation is more sound.
  #​11411
  #​11416
  #​11442
  #​11444
  #​11457
  #​11460
  #​11461
  #​11468
  #​11470
  #​11481
  #​11496

• Component-model-async primitives such as streams, tasks, etc, now use the same
  table as resources in a component. This means that guest-visible allocated
  indices are updated slightly.
  #​11374

• Wasmtime's precompiled binaries available from CI now include the
  component-model-async feature.
  #​11429

• C API release artifacts are now built with LTO so they have a smaller size.
  #​11483

• Code can no longer be loaded on x86_64-unknown-none by default without
  opting-in to a contract that either the host is compiled with SSE2 support or
  wasm is compiled with enough features that libcalls aren't used.
  #​11553

• Host support for component model async futures/streams has been updated to a
  new API.
  #​11515

Fixed

• GC of dead DWARF has been improved.
  #​11402

• Wasm-gc branching instructions now correctly check for fuel.
  #​11426

• The array.new_default instruction now checks for fuel/epochs in its inner
  loop.
  #​11428

• The "min" C API artifacts now have correct headers.
  #​11479

• GC OOM during const eval no longer panics.
  #​11557

• Wasmtime now properly respects a disabled std feature even on targets which
  have std available.
  #​11568

v36.0.3

Compare Source

36.0.3

Released 2025-11-11.

Fixed

• Prevent using shared memories with Memory.
  CVE-2025-64345

v36.0.2

Compare Source

36.0.2

Released 2025-08-26.

Fixed

• Wasmtime will no longer panic in the pooling allocator when in near-OOM
  conditions related to resetting the linear memory of a slot.
  #​11510

v36.0.1

Compare Source

36.0.1

Released 2025-08-21.

Added

• Accessors for internal WASI-related contexts are added to
  wasmtime_wasi::WasiCtx to account for refactorings that happened in this
  release.
  #​11473

Changed

• Release artifacts for the C API are now smaller than the previous release to
  assist with redistribution as-is.
  #​11483

v36.0.0

Compare Source

36.0.0

Released 2025-08-20.

Added

• Cranelift's has initial support for inlining between functions. Wasmtime
  additionally now has support for inlining as well, for example between modules
  in a component.
  #​11210
  #​11239
  #​11228
  #​11269
  #​11283

• The async proposal for the Component Model is now fully implemented in
  Wasmtime with a number of WASIp3 interfaces implemented. The implementation
  is still off-by-default and the implementation of WASIp3 is not fully
  complete, but is remains suitable for testing.
  #​11127
  #​11136
  #​11137
  #​11238
  #​11221
  #​11250
  #​11257
  #​11291
  #​11325

Changed

• Users who implemented WasiHttpView::is_forbidden_header from
  wasmtime-wasi-http now need to include DEFAULT_FORBIDDEN_HEADERS, e.g.
  DEFAULT_FORBIDDEN_HEADERS.contains(name) || name.as_str() == "custom-forbidden-header"
  #​11292

• Cranelift's incremental cache has received some optimizations.
  #​11186

• Wasmtime's internal implementations of WebAssembly primitives has been
  refactored to be modeled with safer internal primitives.
  #​11211
  #​11212
  #​11216
  #​11229
  #​11215
  #​11254
  #​11255
  #​11319
  #​11320

• Detection of native hardware features has been refactored on s390x.
  #​11220

• Further progress has been made towards an implementation of the WebAssembly
  exceptions proposal, although it is not yet complete.
  #​11230
  #​11321

• Cranelift's assembler for x64 now supports EVEX encoding.
  #​11153
  #​11270
  #​11303

• The default implementation of send_request in the wasmtime-wasi-http crate
  is now behind an on-by-default feature gate.
  #​11323

• Configuration of the bindgen! macro has been redesigned to more consistently
  configure per-function options such as whether or not it's async.
  #​11328

• Initial support fo mutatis has been added to Wasmtime's fuzzers.
  #​11290

• The debug-builtins crate feature of wasmtime no compiles on no_std
  targets.
  #​11304

Fixed

• Deserializing external modules no long unnecessarily requires the allocation
  to be aligned.
  #​11306

• A CMake linker error and warning when using the C API on macOS has been fixed.
  #​11293
  #​11315

• The C API declaration of wasmtime_component_linker_instance_add_func has
  been fixed.
  #​11327

• The calculation of reachable DWARF has been fixed.
  #​11338

v35.0.0

Compare Source

35.0.0

Released 2025-07-22.

Added

• A new InputFile type has been added for specifying stdin as a file in WASI.
  #​10968

• Conditional branches to unconditional traps are now translated to conditional
  traps during legalization.
  #​10988

• The TE HTTP header can now be specified by guests.
  #​11002

• Winch on AArch64 should now pass all WebAssembly MVP tests. Note that it is
  still not yet Tier 1 at this time, however.
  #​10829
  #​11013
  #​11031
  #​11051

• The x64 backend now has lowering rules for {add,sub,or,and} mem, imm
  #​11043

• Initial support for WASIp2 in the C API has started to land.
  #​11055
  #​11172

• Initial support for GC support in the component model has started to land
  (note that it is not finished yet).
  #​10967
  #​11020

• The wasmtime-wasi-nn crate now has a feature to use a custom ONNX runtime.
  #​11060

• Cranelift now optimizes division-by-constant operations to no longer use
  division.
  #​11129

• A native-tls backend has been added for the wasi-tls implementation.
  #​11064

Changed

• Many more instructions for the x64 backend in Cranelift were migrated to the
  new assembler.
  #​10927
  #​10928
  #​10918
  #​10946
  #​10954
  #​10958
  #​10971
  #​10942
  #​10975
  #​11017
  #​10898
  #​10836
  ... (and more)

• Wasmtime internally uses Pin for VM data structures to make the internal
  implementations more sound to use. This has no effect on the public API of
  Wasmtime.
  #​10934
  #​10937
  #​10943
  #​10959
  #​11042

• Fused adapters between components now transfer the enum component model type
  more efficiently.
  #​10939

• Filenames of --emit-clif now match the symbol names found in *.cwasm
  artifacts and include the function name as well.
  #​10947
  #​11040

• Wasmtime-internal crates are now all named wasmtime-internal-* to even
  further discourage their use.
  #​10963

• Codegen of conditional traps with float compares has been improved.
  #​10966

• More patterns are now optimized in ISLE mid-end rules.
  #​10978
  #​10979
  #​11173

• Winch's support for constants/scratch registers has been improved internally.
  #​10986
  #​10998

• The C API artifacts on Windows are now produced with Clang instead of
  cl.exe.
  #​10890

• WebAssembly operand types are now taken into account during translation to
  optimize codegen better in the face of subtyping.
  #​11030

• The behavior of blocking-write-and-flush has been updated during flushing
  when closed is found.
  #​11018

• WASI WITs have been updated to 0.2.6.
  #​11049

• OpenVINO has been updated to v2025.1.
  #​11054

• The size of the wasmtime.addrmap section in *.cwasm artifacts has been
  shrunk slightly.
  #​11126

• Authorities in wasmtime-wasi-http can now contain the : character.
  #​11145

• Wasmtime now requires Rust 1.86 to compile.
  #​11142

• Wasmtime's DRC collector has been optimized and has a new more efficient means
  of managing the set of over-approximated roots on the stack.
  #​11144
  #​11148
  #​11167
  #​11168
  #​11169
  #​11175

• The ComponentType trait in Wasmtime now requires the Send and Sync
  bounds for all implementors.
  #​11160

• The V128 type is now usable on platforms other than aarch64 and x86_64.
  #​11165

• Wasmtime's policy on unsafe code and guidelines has been added.
  #​11177

• The std crate will no longer implicitly be used on cfg(unix) and
  cfg(windows) targets when the std Cargo feature is disabled. This means
  that these platforms now require std to be enabled to use the
  platform-specific implementation of linear memory, for example.
  #​11152

Fixed

• A panic when optimizing icmp with vectors has been fixed.
  #​10948

• A panic when lowering scalar_to_vector with i16x8 types has been fixed.
  #​10949

• The vector state register is now considered clobbered by calls on riscv64 to
  ensure it's updated across calls.
  #​11048

• An instance of gdb crashing on DWARF emitted by Wasmtime has been fixed.
  #​11077

• Fix a panic in the host caused by preview1 guests using fd_renumber.
  CVE-2025-53901.

• Fix a panic in the preview1 adapter caused by guests using fd_renumber.
  #​11277

v34.0.2

Compare Source

34.0.2

Released 2025-07-18.

Fixed

• Fix a panic in the host caused by preview1 guests using fd_renumber.
  CVE-2025-53901.

• Fix a panic in the preview1 adapter caused by guests using fd_renumber.
  #​11277

34.0.1

Released 2025-06-24.

Fixed

• Fix a panic with host-defined tables/globals and concrete reference
  types.
  #​11103

v34.0.1

Compare Source

34.0.1

Released 2025-06-24.

Fixed

• Fix a panic with host-defined tables/globals and concrete reference
  types.
  #​11103

v34.0.0

Compare Source

34.0.0

Released 2025-06-20.

Added

• Support for SIMD in the Pulley interpreter can now be disabled at compile-time
  to shrink the size of the final binary.
  #​10727

• The C API now has wasmtime_trap_new_code to create a wasm_trap_t from
  its code.
  #​10765

• Winch's support for x86_64 is now classified with tier 1 support in Wasmtime.
  #​10755

• Winch's support for aarch64 now implements stack checks to pass many more spec
  tests.
  #​10763

• Cranelift's s390x backend now has full support for the f128 type.
  #​10774

• Wasmtime's C API for the component model has initial support for calling
  functions.
  #​10697
  #​10841
  #​10858
  #​10864
  #​10877

• The wasmtime wast command now has a --generate-dwarf flag to show
  filename/line number information for backtraces.
  #​10780

Changed

• The shape of bindgen!-generated add_to_linker functions has changed with
  the removal of GetHost and replacement of a HasData trait. For more
  information see the associated PR.
  #​10770

• Wasmtime's Store<T> now requires that T: 'static. This is done in
  preparation for merging WASIp3 work to the main repository with some more
  information on the associated PR.
  #​10760

• The wasmtime::component::Instance::instance_pre method is now public.
  #​10761

• Wasmtime and Cranelift's minimnum supported version of Rust (MSRV) is now
  1.85.0.
  #​10785

• Cranelift's debugtrap on aarch64 now generates brk #​0xf000 for debuggers
  to recognize it.
  #​10813

• The wasi-http implementation no longer generates a trap if the handle to
  receive the response on the host is dropped early.
  #​10833

• The wasmtime serve command will now send some boilerplate descriptive HTML
  on a 500 server error instead of nothing.
  #​10851

• A significant amount of work has gone into the new assembler for the x64
  backend. Too many PRs to list here but progress continues apace at defining
  all machine instructions in a standalone crate.

• Cranelift will now reject unimplemented big-endian loads/stores on backends
  that do not implement this functionality.
  #​10863

• The wasmtime explore generated HTML handles large modules better now.
  #​10892

• Wasmtime's internal representation of wasmtime::Func has changed and a
  previous optimization of Func::call has been lost. If affected it'd
  recommended to use Func::call_unchecked instead or to open an issue.
  #​10897

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