Bug#815676: Bad indent after line with ternary operator in Qtcreator

[Strelok]

Package: qtcreator
 Version: 3.2.1

I'm type a line "return x>0?array[0]:0;" and press enter. After this
indent in new line grow to 4 space. If line don't contain "[0]", bug
not appear.
Expected result: indent of new line must be the same as indent in
prevision line.
PS Also tested in qtcreator 3.6.0 (Debian Testing), result the same.