MCHECK_HEAD      1886 src/gmalloc.c        status = MCHECK_HEAD;
MCHECK_HEAD      1999 src/gmalloc.c      case MCHECK_HEAD:
MCHECK_HEAD      1873 test/manual/etags/c-src/emacs/src/gmalloc.c       status = MCHECK_HEAD;
MCHECK_HEAD      1986 test/manual/etags/c-src/emacs/src/gmalloc.c     case MCHECK_HEAD: