use run_make_support::{rfs, rustc}; fn main() { #[cfg(unix)] let non_unicode: &std::ffi::OsStr = std::os::unix::ffi::OsStrExt::from_bytes(&[0xFF]); #[cfg(windows)] let non_unicode: std::ffi::OsString = std::os::windows::ffi::OsStringExt::from_wide(&[0xD800]); let output = rustc().input("non_unicode_env.rs").env("NON_UNICODE_VAR", non_unicode).run_fail(); let expected = rfs::read_to_string("non_unicode_env.stderr"); output.assert_stderr_equals(expected); }