wasm: Uncaught TypeError: Error resolving module specifier “env”

[schell]

I've run into an interesting bug where attempting to run a wasm32-compiled program with fastrand in it gives this error in the console:

Uncaught TypeError: Error resolving module specifier “env”. Relative module specifiers must start with “./”, “../” or “/”.

I'm using fastrand = "1.8.0"

I encountered this after adding futures-lite to my project, which depends on fastrand. rustwasm/wasm-bindgen#2215 explains a few reasons why this error might pop up.

I got around this problem by using futures_lite::StreamExt::or instead of futures_lite::StreamExt::race. race uses fastrand::bool, whereas or does not.

[taiki-e]

Duplicate of #27

[notgull]

Note that if you compile and run the program in a WASI environment, it should all work out.