Structs whose name begins with "Test" cause run-time failures in wasm-bindgen-test tests

[prestwich]

Describe the Bug

When using wasm-bindgen-test via wasm-pack test, if any struct have a name beginning with Test or test and have the #[wasm-bindgen] macro the tests will fail to run.

Steps to Reproduce

1. wasm-bindgen = "0.2.62"
2. wasm-bindgen-test = "0.3.12"
3. Add the following to a fresth lib.rs and run wasm-pack test --node.

#[wasm_bindgen]
pub struct Test;

#[cfg(test)]
pub mod test {
    use wasm_bindgen_test::*;

    #[wasm_bindgen_test]
    fn pass() {
        assert_eq!(1, 1);
    }
}

Actual Behavior

These struct names work:

• ConnectionTest
• SocketTest
• ATest
• Attestation

These names fail:

• Test
• TestConnection
• Testnet
• Testify
• test
• testify

Removing the #[wasm-bindgen] macro causes everything to succeed. Packages can be built succesfully, imported into Node, and used normally. Only tests break

Failures produce the following error message (stack information has been trimmed):

$ wasm-pack test --node

panicked at 'exception thrown while creating a test: Error: recursive use of an object detected which would lead to unsafe aliasing in rust

[alexcrichton]

Oh dear what a bizarre bug! Should be fixed in #2123 though, thanks for the report!