[Bug pch/78970] GCC crashes if input file is dash

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78970

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |5.4.0, 6.3.0

--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.