ceph/src/civetweb/src/third_party/duktape-1.5.2/polyfills/duktape-error-setter-nonwritable.js

   1 /*
   2  *  Ensure Error .fileName, .lineNumber, and .stack are not directly writable,
   3  *  but can be written using Object.defineProperty().  This matches Duktape
   4  *  1.3.0 and prior.
   5  *
   6  *  See: https://github.com/svaarala/duktape/pull/390.
   7  */
   8
   9 (function () {
  10     var err = new Error('test');
  11     err.fileName = 999;
  12     if (err.fileName !== 999) { return; }  // already non-writable
  13
  14     var fn = new Function('');  // nop
  15     Object.defineProperties(Error.prototype, {
  16         fileName: { set: fn },
  17         lineNumber: { set: fn },
  18         stack: { set: fn }
  19     });
  20 })();