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denoland-deno/cli/tests/testdata/wasm_streaming_panic_test.js.out
Andreu Botella d983b577bc
chore(wasm): Don't await on the argument to handleWasmStreaming (#14000)
`handleWasmStreaming` is the function that provides the binding with
the `fetch` API needed for `WebAssembly.instantiateStreaming()` and
`WebAssembly.compileStreaming()`. When I implemented it in #11200, I
thought V8 was calling these functions with the argument of the
`WebAssembly` streaming functions, without doing any resolving, and so
`handleWasmStreaming` awaits for the parameter to resolve. However,
as discovered in
https://github.com/denoland/deno/issues/13917#issuecomment-1065805565,
V8 does in fact resolve the parameter if it's a promise (and handles
rejections arising from that).

This change removes the `async` IIFE inside `handleWasmStreaming`,
letting initial errors be handled synchronously (which will however
not throw synchronously from the `WebAssembly` namespace functions).
Awaiting is still necessary for reading the bytes of the response,
though, and so there is an `async` IIFE for that.
2022-03-29 14:44:33 +02:00

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error: Uncaught (in promise) TypeError: Invalid WebAssembly content type.
at handleWasmStreaming (deno:ext/fetch/26_fetch.js:[WILDCARD])