#42336: segfault happens with 'parrot --pre-process-only' Avoid the segfault that occurs when do_pre_process() wanted to show detaily of a macro.
#42336: segfault happens with 'parrot --pre-process-only'
Avoid the segfault that occurs when do_pre_process()
wanted to show detaily of a macro.


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@18587 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot