GCC 6's -Wmisleading-indentation flags the break-statement in engines/gnap/scenes/group4.cpp:2694 to be misleadingly indented.
Specifically, this break-statement is indented as if it belonged inside the if-statement in line 2692. However, due to the lack of curly braces on that if-statement, this break-statement is not within the scope of that if-statement.
Thanks, fixed.