Case-insensitive regex search with [^ranges] does not work correctly

[vda]

In Command->Find File dialog, I search for "dbus::message" in a C++ source tree. It finds unwanted things like "DBus::MessageIter?".

Note: in this case, I have Case sensitive off.

So I select [x] Regular expression and search for "dbus::message[^{A-Za-z]". It still finds "DBus::MessageIter?". Same happens with "DBus::Message[}Ii]".

With checked [x] Case sensitive option and "DBus::Message[^{A-Za-z]" regex, it works as it should.}

Observed on today's git.