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RELEASES.md

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25.0.2

Released 2024-10-09.

Fixed

  • Fix a runtime crash when combining tail-calls with host imports that capture a stack trace or trap. GHSA-q8hx-mm92-4wvg

  • Fix a race condition could lead to WebAssembly control-flow integrity and type safety violations. GHSA-7qmx-3fpx-r45m

25.0.1

Released 2024-09-24.

Added

  • The wasmtime CLI's -Wmax-wasm-stack option now automatically configures the async stack size as well. A new -Wasync-stack-size option was additionally added to configure it too. #9302

25.0.0

Released 2024-09-20.

Added

  • The WinML backend of wasmtime-wasi-nn now supports FP16 and I64. #8964

  • Pooling allocator configuration options for table elements and core instance size can now be changed on the CLI. #9138

  • Wasmtime now supports the extended-const WebAssembly proposal. #9141

  • The wasmtime crate embedding API now has ArrayRef for allocating wasm GC arrays. #9145

  • Cranelift now has a stack_switch CLIF instruction to be used with the WebAssembly stack switching proposal. #9078

  • There are now more constructors available on bindgen!-generated structures for component exports now which use instantiated components rather than pre-instantiated components. #9177

Changed

  • The host bindgen macro now accepts a new verbose_tracing option, which will trace the value of list arguments. The new behavior of the tracing option is that it does not print list values without verbose_tracing also being present. #9262

  • Wasmtime's support for WASI is now listed with the 0.2.1 version instead of 0.2.0. This is expected to not cause fallout or breakage, but please open an issue if you see any problems. #9063

  • Work continues on Winch's AArch64 backend. #9114 #9092 #9171

  • Component model resource methods can now be generated as async and will do so by default if async is enabled for all functions. #9091

  • Work has continued on Wasmtime's interpreter backend, Pulley. #9089

  • The internal implementation of input-stream and output-stream for filesystems in wasmtime-wasi have been refactored to directly implement the corresponding host traits. This additionally helps cleanup the internal organization of host-side resources in wasmtime-wasi. #9129

  • Wasmtime now uses the new "user" stack maps in Cranelift rather than the old regalloc-based stack maps for GC references. #9082

  • Wasmtime's handling of WebAssembly features now works slightly differently from before to provide better error messages and fewer panics on unsupported WebAssembly features depending on compiler and target selection. Additionally the reference-types WebAssembly proposal is always on-by-default regardless of crate features. #9158 #9162

  • The wasmtime CLI will now use the async version of I/O where possible to properly support -Wtimeout and timing out instances blocked in I/O. #9184

Fixed

  • Use tracing::Instrument in generated bindings when tracing and async are enabled, ensuring that spans aren't present in traces from unrelated async tasks. #9217 #9263

  • Completed support for the CallHook API when using the component model. #9196

  • The compile time for a component model enum type with many cases should be much improved now. #9122

  • Some minor bugfixes have been made for when Wasmtime is working with split DWARF in WebAssembly files. #9109 #9132 #9134 #9139 #9151

  • An issue with bounds checks and dynamic checks has been fixed in Winch to ensure bounds checks are correctly implemented. #9156

Release notes for previous releases of Wasmtime can be found on the respective release branches of the Wasmtime repository.