pub fn run_rust_compiler_frontend(
request: &RustCompilerRunRequest,
diagnostics: &mut dyn Write,
) -> Result<RustCompilerFrontendRun, RustCompilerTestError>pub fn run_rust_compiler_frontend(
request: &RustCompilerRunRequest,
diagnostics: &mut dyn Write,
) -> Result<RustCompilerFrontendRun, RustCompilerTestError>