[Bug preprocessor/123273] [13/14/15/16 Regression] -E -fdirectives-only reporting error on comments

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123273

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-12-23
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |13.5
            Summary|-E -fdirectives-only        |[13/14/15/16 Regression] -E
                   |reporting error on comments |-fdirectives-only reporting
                   |                            |error on comments
     Ever confirmed|0                           |1

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. I suspect r11-9334 (aka r12-5340-g049f0efeaa77b43a508172161) exposed
the problem.

But really r11-206-gb224c3763e018e8b caused the issue originally as shown by:
```
/*
print "\/\* $bits *\/\n";
print "#define HDR_${name}_VAL(h)".(" " x
(11-length($name)))."(((h)\&HDR_$name) >> ".length($1).")\n";
*/
```
Which only differs by the removal of the `\` before the `*/`.