Regex validator: All flags are ignored if ECMA regex is provided

[avrahamshukron]

Simply put:

In [13]: v = Regex("foobar", multiline=True)
In [14]: v.flags
Out[14]: [8]  # As expected

In [16]: v = Regex("/foobar/i")
In [17]: v.flags
Out[17]: []  # WTF?

In [18]: v = Regex("/foobar/i", multiline=True)
In [19]: v.flags
Out[19]: []  # WTF?!?!

It appears that providing an ECMA regex will actually cause the library to ignore any flags provided in any way.

This is clearly a bug, and in direct contradiction to the documentation which state that:

Note, that if given pattern is ECMA regex, given flags will be completely ignored and taken from given regex.

[beregond]

That one was merged, thanks!