Creator 4.6 beta introduced a bug where text becomes invisible.

Consider this example:

#define MACRO1(x) std::cerr << x << " blah blah"

void foo()
{
    MACRO1("foo" << "bar");
}

The "<<" is invisible, but becomes visible if the syntax highlighter is thrown off (due to a parse error.)

Video demonstrating the bug:

https://youtu.be/gXRmVB1FwZQ

The video is also attached to the bug as an MKV file.