fix a bug in the debugger (PR 9710 & 9717)
fix a bug in the debugger (PR 9710 & 9717)

svn: r11509

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket