[Bug preprocessor/118737] New: preprocessor should error out right if one of the first few bytes is not a recognized character

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118737

            Bug ID: 118737
           Summary: preprocessor should error out right if one of the
                    first few bytes is not a recognized character
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: enhancement
          Priority: P3
         Component: preprocessor
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

I run into this ever once in a while when I forgot uncompress and then I get a
stream of error messages and even worse since the diagnostic will print out
escape characters the termininal goes into an odd state (where only reset
command can get it out of that).

This shows up with almost all front-ends and I am not sure if preprocessor is
the correct component because of that.