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Update wasmtime to 50.0.1 - #394
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martindevans merged 2 commits intoNov 5, 2026
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- `wasmtime_component_func_t` gained a pointer field, so the managed mirror grows from 24 to 32 bytes. With the old size every component call read past the struct and crashed the process. - Wasmtime now enables component-model async by default, and that feature requires reference types. `Config.WithReferenceTypes(false)` now also turns component-model async off, so the engine can still be created. - The component text format now requires the `core` keyword in canonical options, e.g. `(memory (core memory $i "memory"))` and `(realloc (core func $i "realloc"))`. Updated the test fixture and the component example.
martindevans
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Nov 4, 2026
| public static extern void wasmtime_config_wasm_reference_types_set(Handle config, [MarshalAs(UnmanagedType.I1)] bool enable); | ||
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| [DllImport(Engine.LibraryName)] | ||
| public static extern void wasmtime_config_wasm_component_model_async_set(Handle config, [MarshalAs(UnmanagedType.I1)] bool enable); |
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I suspect that we probably need to always unconditionally disable component async. The way that wasmtime implements async is incompatible with dotnet :(
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Updated to always disabled.
Wasmtime's async implementation isn't compatible with .NET, so the Config constructor turns component-model async off rather than only doing so when reference types are disabled.
martindevans
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Nov 5, 2026
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LGTM! Thanks for working on this
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Includes these changes to support the new wasmtime version:
wasmtime_component_func_tgained a pointer field, so the managed mirror grows from 24 to 32 bytes.corekeyword in canonical options, e.g.(memory (core memory $i "memory"))and(realloc (core func $i "realloc")).