test/mjsunit/regress/regress-1355.js

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// Test that an exception is not thrown when trying to set a value for
// a property that has only a defined getter, except when in strict mode.

var foo = Object.defineProperty({}, "bar", {
 get: function () {
      return 10;
    }
  });

assertDoesNotThrow("foo.bar = 20");

function shouldThrow() {
  'use strict';
  foo.bar = 20;
}

assertThrows("shouldThrow()");