This patch fixes the following problems: - Fixes a problem that causes dbx to hang when stepping past a system() function call. - Fixes a dbx problem with listing a large Fortran program that contains alternate entry points. - Fixes a problem with dbx when debugging programs that have large source files. In some cases dbx may abort with a segmentation fault. - Fixes a problem with dbx. A segmentation fault may occur when displaying an array or when showing the type and dimensions of an array.