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RELEASES.md

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26.0.1

Released 2024-11-05.

Fixed

  • Update to cap-std 3.4.1, for #9559, which fixes a wasi-filesystem sandbox escape on Windows. CVE-2024-51745.

26.0.0

Released 2024-10-22.

Added

  • The "table64" extension of the memory64 proposals to WebAssembly has been implemented. #9206

  • Initial support has been added for compiling WebAssembly modules with Pulley, Wasmtime's interpreter. Note that the interpreter is not feature complete yet. #9240

  • Wasmtime can now execute code without relying on host-based signal handlers. #9230

  • Work has continued on implementing the GC proposals in Wasmtime. #9246 #9244 #9271 #9275 #9278 #9282 #9285 #9326 #9341 #9358

  • Support for ARM64 Windows has been finished with support for unwinding. Release binaries are now also available for this platform. #9266 #9283

  • The bindgen! macro now supports multiple paths to load WIT from. #9288

  • A new -W async-stack-size=N argument has been added to the CLI. #9302

  • A new wasmtime completion subcommand can be used to generate a completion script for the Wasmtime CLI. #9312

  • Components now support initialize_copy_on_write_image like core modules. #9357

  • Initial support for the ISLE verifier Crocus has landed. #9178

Changed

  • Wasmtime now requires Rust 1.79.0 to compile. #9202

  • The future-trailers.get in wasi-http now returns none when trailers are absent. #9208

  • The Cranelift instructions iadd_cin and isub_bin were removed. The isub_borrow and iadd_carry instructions were renamed to {u,s}add_carry and {u,s}sub_borrow. #9199

  • Winch now supports multi-value results on AArch64. #9218

  • Some issues related to shutdown have been fixed with WASI sockets. #9225

  • Cranelift now has a Cargo feature to enable support for all native ISAs and not Pulley. #9237

  • Cranelift support for StructArgument in the arm64, riscv64, and s390x backends has been removed. #9258

  • The pooling allocator no longer limits instances/memories/tables by default. #9257

  • Stack overflow on an async stack will now print a message that this happened. #9304

  • Cranelift's cranelift-wasm crate has been removed and folded directly into wasmtime-cranelift. #9313

  • Cranelift's TrapCode type is now represented with a single byte. #9338

Fixed

  • Stack slots in Cranelift are now aligned from the start instead of the end. #9279

  • The WASIp1 adapter now correctly handles allocations where the initial alignment consumes the entire allocation. #9356

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