Ensure that JsValue
isn't considered Send
#955
Merged
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The
JsValue
type wraps a slab/heap of js objects which is managed bythe wasm-bindgen shim, and everything here is not actually able to cross
any thread boundaries. When wasm actually has threads, for example, each
thread will have to have its own slab of objects generated by
wasm-bindgen, and indices in one slab aren't valid in any other slabs.
This is technically a breaking change because
JsValue
was previouslySend
andSync
, but I'm hoping that in practice this isn't actually abreaking change because nothing in wasm can be using threads which in
theory shouldn't activate the
Send
and/orSync
bounds.