:set -fprint-explicit-foralls

:l QSort

:delete 1        
-- Illegal: empty breakpoint list

:break NonModule 1
-- Illegal: I don't know this module

:break QSort 1 1    
-- Error: No breakpoint here

:show breaks             
-- Show an empty list

qsort [8, 4, 42, 16, 15, 23]  
-- Should run normally

-- Testing that ghci commands work normally
:i map