Luke Wilde ada8880f58 LibJS: Leave unwind context if it has no finalizer when using handler ...

For example, a try/catch block with no finally. The try block and catch
block do not need to unwind to a finally block, so the unwind context
is no longer needed when we jump to the catch block.

If we threw an exception in a catch block of a try/catch, there will be
no handler or finalizer and the unit would continue on as if nothing
happened.

This would subsequently crash with the  `m_saved_exception.is_null()`
assertion failure when we next call a non-native function.

2022-03-14 21:15:27 +03:30

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