[Bug preprocessor/69177] [6 Regression] Bit-packing optimization makes it too easy to have location_t >= LINE_MAP_MAX_LOCATION_WITH_COLS

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69177

--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Richi -- why is this a P1?  This is BZ essentially documents a design decision
to use some of the space in the line map to allow compact representation of
rich locations for diagnostics.

That design decision inherently is going to make it more likely to have
location_ts that dont fix into LINE_MAP_MAX_LOCATION_WITH_COLS.

That's why I made this a P4.  I don't see how fixing this could be considered a
blocker.