src/third_party/mozjs-45/js/src/jit-test/tests/ctypes/conversion-error.js

load(libdir + 'asserts.js');

function test() {
  let obj = {
    toSource() {
      throw 1;
    }
  };
  assertTypeErrorMessage(() => { ctypes.double().value = obj; },
                         "can't convert <<error converting value to string>> to the type double");
}

if (typeof ctypes === "object")
  test();