[Bug preprocessor/94168] New: [10 Regression] error: extended character § is not valid in an identifier since r10-3309-g7d112d6670a0e0e6

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94168

            Bug ID: 94168
           Summary: [10 Regression] error: extended character § is not
                    valid in an identifier since
                    r10-3309-g7d112d6670a0e0e6
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: preprocessor
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

I see the following regression:

$ cat red.cc
#ifdef WINDOWS
§
#endif

$ g++-9 red.cc -c
$ g++ red.cc -c
red.cc:2:1: error: extended character § is not valid in an identifier
    2 | ��
      | ^