[Bug modula2/108493] Interaction with implicit includes and -traditional-cpp

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108493

--- Comment #1 from Iain Sandoe <iains at gcc dot gnu.org> ---
I can reproduce this with C - so it's not specifically a module-2 issue (but
the use of traditional-cpp does trigger it .. and for keywords within (* *) so
we need to figure out what the intended semantics are.

----

# 0 "t.c"
# 0 "<built-in>"
# 0 "<command-line>"
# 1 "t.c"
t.c:2: error: detected recursion whilst expanding macro "vector"
    2 | vector X;
      | 

vector X;