text: /* Copyright JS Foundation and other contributors, http://js.foundation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  function check_syntax_error(code)
  {
    try {
      eval(code);
      assert(false);
    } catch (e) {
      assert(e instanceof SyntaxError);
    }
  }
  
  check_syntax_error("try {} catch() {}");
  check_syntax_error("try {} catch([a] {}");
  check_syntax_error("try {} catch([a] = [1]) {}");
  check_syntax_error("try {} catch({a} = {a:1}) {}");
  check_syntax_error("try {} catch(a,) {}");
  
  try {
    throw [1,2]
    assert(false)
  } catch ([a, b]) {
    assert(a === 1)
    assert(b === 2)
  }
  
  try {
    throw { x:1, y:2 }
    assert(false)
  } catch ({x, 'y':b}) {
    assert(x === 1)
    assert(b === 2)
  }
  
  try {
    throw [1,2]
    assert(false)
  } catch ([a, b]) {
    eval("assert(a === 1)")
    eval("assert(b === 2)")
  }
  
  try {
    throw { x:1, y:2 }
    assert(false)
  } catch ({x, 'y':b}) {
    eval("assert(x === 1)")
    eval("assert(b === 2)")
  }
  
  try {
    try {
      throw []
      assert(false)
    } catch ([a = b, b]) {
      assert(false)
    }
  } catch (e) {
    assert(e instanceof ReferenceError)
  }
  