I'll confirm:
delete_line and duplicate_line does not work on the last line in the buffer.
jump to the next error before finishing compilation requiers to recompile in order to jump again.
Also,
bug: list_all_locations (and it's other versions) returns an empty buffer if the search buffer already exists.
wish: undo tree or a semiliar non-destructive way of undoing (
emacs undo tree plugin had helped me alot in the past).