[Bug driver/98794] New: @file error checking is inconsistent

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98794

            Bug ID: 98794
           Summary: @file error checking is inconsistent
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nathan at gcc dot gnu.org
  Target Milestone: ---

The driver's behaviour with missing @files is inconsistent, possibly to allow
actual source files of that form.  See
https://gcc.gnu.org/pipermail/gcc-patches/2021-January/564008.html for some
analysis.