gap> filt:=NewFilter("BreakPrint");;
gap> InstallMethod(ViewObj, [filt], SUM_FLAGS, x -> 0/0);;
gap> badgroup := Group(());
Group(())
gap> SetFilterObj(badgroup, filt);
gap> old_OnBreak:=OnBreak;;
gap> OnBreak:=fail;; # prevent backtrace with line numbers that keep chaning
gap> View([[badgroup]]); # <- trigger break loop
Error, Rational operations: <divisor> must not be zero in
0 / 0 at *stdin*:3 called from
type 'quit;' to quit to outer loop
brk> quit;
[ [
gap> OnBreak:=old_OnBreak;;
gap> l := [1,2,3];
[ 1, 2, 3 ]
gap> l;
[ 1, 2, 3 ]
gap> Print(l,"\n");
[ 1, 2, 3 ]
gap> l;
[ 1, 2, 3 ]
gap> Print(l,"\n");
[ 1, 2, 3 ]
gap> Print(l,"\n");
[ 1, 2, 3 ]
gap> 2;
2
gap> Print(l,"\n");
[ 1, 2, 3 ]
gap> Print(l,"\n");
[ 1, 2, 3 ]
gap> QUIT;
