1. Use the Default intelliSenseEngine.
2. Put the cursor on a variable name with UTF-8 characters > 1 byte, such as "int cабв". See http://en.cppreference.com/w/cpp/language/identifiers for the valid characters in C++ identifiers.

Bug: The full variable is not selected. Our code for checking for valid identifiers isn't correct. I think there may be other buggy symptoms caused by this, but I'm not sure.

Be sure you're not hitting the other bug in which the IntelliSense is getting the wrong offsets due to UTF-8 characters > 1 byte (i.e. hover should be showing the correct values).