gcc/testsuite/ChangeLog:
	PR c++/79300
	* g++.dg/diagnostic/pr79300.C: New test case.

libcpp/ChangeLog:
	PR c++/79300
	* line-map.c (linemap_macro_loc_to_def_point): Preserve range
	information for macro expansions by delaying resolving ad-hoc
	locations until within the loop.

From-SVN: r250058