Fix ClassCastException when builtin is invoked with wrong args

[Akirathan]

Fixes #11774

Pull Request Description

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[JaroslavTulach]

Assuming the test failed originally and now works, feel free to move on and integrate. One wish whispered inline...

[Akirathan]

Assuming the test failed originally and now works, feel free to move on and integrate.

Yes, that is the case. On develop, the new test is failing.