Ken Shmidheiser wrote: > I just noticed the warning and crash appear to occur when I am > typing a "?" (question mark). There's a function in the editor that decides whether to convert a typed '?' into 'print' then inserts the result. I can't reproduce your bug, but I found and fixed a Really Obvious uninitialised variable in the insertion call. With luck this is a true fix; it will be in the forthcoming FB 5.4 release. The perilous bug-in-waiting escaped notice until now because the compiler doesn't give a warning for usage like this: local fn foo( @x as ptr ) long if ( x.0& != 0 ) // show silly alert, then crash xelse // something sensible end if end fn local fn bar dim as long uninit fn foo( uninit ) end fn Robert P.