What steps will reproduce the problem? 1. compiling the program

On Debian Sid I get a compilation error: src/QIComplete/tree.cpp:134: error: 'free' was not declared in this scope

I've heard this has something to do with the way that the gcc version on Sid handles includes (gcc 4.3.1).

To fix it you should add "#include <cstdlib>" to src/QIComplete/tree.cpp

Fixed in revision 330