[Bug preprocessor/78680] [7 Regression] ICE in get_substring_ranges_for_loc, at input.c:1398

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78680

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
The failed assertion in get_substring_ranges_for_loc:

  gcc_assert (line_width >= (start.column - 1 + literal_length));

suggests that the code assumes the entire literal is on the same line (i.e.,
contains no escaped newlines).  Removing the assertion avoids the ICE but I'm
not familiar enough with the code to even guess if that's a viable fix or if it
would just delay the symptom of the bug.  David will know for sure.