There is a buffer overflow when you have function help enabled and type a "(" or otherwise try to get function help on a line having between 106 and 128 characters. The fix for this is in the attached ScintillaEditView.patch file.
Also, not providing function help for lines that are longer than 128 characters seems a bit limiting. Bumping this to 256 would be nice. In FunctionCallTip.cpp, function getCursorFunction, increase the value of "const int maxLen" to 256.
Thanks for maintaining such a great editor!!