make test hangs on the Y tests

[Vincent Stemen <vince.lists@hightek.org>]

Hi.  On the master branch from git as of yesterday, running "make test"
hangs when it gets to the Y01completion test.  It seems to hang on any
of the 'Y' tests.

    # ZTST_verbose=2 make TESTNUM=Y test
    cd Test ; make check
    if test -n "gcc"; then  cd .. && DESTDIR=  make MODDIR=`pwd`/Test/Modules install.modules > /dev/null;  fi
    if ZTST_testlist="`for f in ./Y*.ztst;  do echo $f; done`"  ZTST_srcdir="."  ZTST_exe=../Src/zsh  ../Src/zsh +Z -f ./runtests.zsh; then  stat=0;  else  stat=1;  fi;  sleep 1;  rm -rf Modules .zcompdump;  exit $stat
    ./Y01completion.ztst: starting.
    ZTST_getsect: read section name: prep
    ZTST_getchunk: read code chunk:
      if ( zmodload -i zsh/zpty ) >/dev/null 2>&1; then
        . $ZTST_srcdir/comptest
        mkdir comp.tmp
        cd comp.tmp
        comptestinit -z $ZTST_testdir/../Src/zsh &&
        {
          mkdir dir1 &&
          mkdir dir2 &&
          touch file1 &&
          touch file2
        }
      else
        ZTST_unimplemented="the zsh/zpty module is not available"
      fi
    ^C

As you can see at the bottom, I eventually hit ^C to break out.