Rhino error: Changing attributes not supported for Function prototype property

[ai]

When I try to run compiled JS and Rhino (to run Autoprefixer into Java) it fall with:

Rhino::JSError:
       InternalError: Changing attributes not supported for Function prototype property
     # at <eval>:13904 (createClass)
     # at <eval>:14295
     # at <eval>:14279
     # at <eval>:13557

Line 13904 from this backtrace contains:

$defineProperty(ctor, 'prototype', {
  configurable: false,
  writable: false
});

[ai]

@johnjbarton @arv this error is in Traceur Runtime. Maybe we should wrap this code in try {} catch {}, because JS will works without with defineProperty.

[ai]

@johnjbarton @arv if you agree with try catch I can send PR.

[johnjbarton]

To me, this error is in Rhino, where the exception originates.

[arv]

Yeah, this is a Rhino bug.

Try/catch seems bad. What does the prototype descriptor look like in Rhino? Maybe it is sane and says that configurable is already false, then we can use that to determine if this is safe.

[ai]

If Rhino throw this error, it already had configurable: false and writable: false :).

[arv]

The spec says that no error should be thrown when defineProperty has SameVaue for all fields.

[ai]

@arv what did you mean?

[arv]

The following should not be an error:

var o = {};
Object.defineProperty(o, 'x', {
  configurable: false,
  writable: false,
  value: 1,
});
Object.defineProperty(o, 'x', {
  configurable: false,
  writable: false,
});

since it all the keys in the descriptor are the same.

[techhounds2015]

Hi All

we are upgrading to jQuery version 3.2.1
We have Rihno version 1_7R2 and we are getting error Object.defineProperty is not a function.
I tried other new version of Rihno but nothing worked.

The reason may be Object.defineProperty is defined in JS 1.8 and rihno is in JS 1.7

can anyone of you help me to solve this ?