Module imports function '__wbindgen_describe' from '__wbindgen_placeholder__' that is not exported by the runtime

Developers
2

Just ran into this, adding what I found if someone wants to dig deeper.

This errors out

getrandom = { version = "0.2.6", features = ["js"]}
rand = "0.8.5"

Error: The Replica returned an error: code 5, message: “Wasm module of canister rrkah-fqaaa-aaaaa-aaaaq-cai is not valid: Wasm module has an invalid import section. Module imports function ‘__wbindgen_describe’ from ‘wbindgen_placeholder’ that is not exported by the runtime.”

This works

getrandom = { version = "0.2.3", features = ["js"]}
rand = "0.7.3"

$ dfx --version
dfx 0.9.3

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