Martin Hiller e3a20e7f0a Do not redefine __asyncValues if it already exists (#20460)
The emitted declaration for the __asyncValues variable checked for the
global property __asyncIterable instead of its actual declared name
__asyncValues.

Now the __asyncValues variable is not redefined if it is already
present as global variable.

This commit fixes issue #20408.
2018-01-03 17:18:15 -08:00
..