[Bug preprocessor/112701] wrong type inference for ternary operator with `0/0u` in preprocessing context

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112701

Lewis Hyatt <lhyatt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-11-27
     Ever confirmed|0                           |1
                 CC|                            |lhyatt at gcc dot gnu.org

--- Comment #4 from Lewis Hyatt <lhyatt at gcc dot gnu.org> ---
Here is the fix. Not sure if it needs to wait for GCC 15 by now, but I can
submit it with the testcase.

diff --git a/libcpp/expr.cc b/libcpp/expr.cc
index 825d2c2369d..4f4a9722ac7 100644
--- a/libcpp/expr.cc
+++ b/libcpp/expr.cc
@@ -2216,6 +2216,7 @@ num_div_op (cpp_reader *pfile, cpp_num lhs, cpp_num rhs,
enum cpp_ttype op,
       if (!pfile->state.skip_eval)
        cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0,
                             "division by zero in #if");
+      lhs.unsignedp = unsignedp;
       return lhs;
     }