message: add compiler error instead
diff: @@ -175,9 +175,7 @@ mod tests {
  }
  #[cfg(not(any(feature = "llvm", feature = "clif", feature = "dynasm")))]
  - fn get_compiler() -> impl Compiler {
  - panic!("compiler not specified, activate a compiler via features")
  - }
  + compile_error!("compiler not specified, activate a compiler via features");
  #[test]
  fn should_detect_emscripten_files() {
  