https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61474
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Lewis Hyatt <lhy...@gcc.gnu.org>: https://gcc.gnu.org/g:601dbf2a799f691688dfe78250b5bea2717b5b5e commit r14-4185-g601dbf2a799f691688dfe78250b5bea2717b5b5e Author: Lewis Hyatt <lhy...@gmail.com> Date: Fri Sep 15 13:31:51 2023 -0400 libcpp: Fix ICE on #include after a line marker directive [PR61474] As noted in the PR, GCC will segfault if a file name is first seen in a linemarker directive, and then later seen in a normal #include. This is because the fake include process adds the file to the cache with a null PATH member. The normal #include finds this file in the cache and then attempts to use the null PATH. Resolve by adding the file to the cache with a unique starting directory, so that the fake entry will only be found by a subsequent fake include, not by a real one. libcpp/ChangeLog: PR preprocessor/61474 * files.cc (_cpp_find_file): Set DONT_READ to TRUE for fake include files. (_cpp_fake_include): Pass a unique cpp_dir* address so the fake file will not be found when looked up for real. gcc/testsuite/ChangeLog: PR preprocessor/61474 * c-c++-common/cpp/pr61474-2.h: New test. * c-c++-common/cpp/pr61474.c: New test. * c-c++-common/cpp/pr61474.h: New test.
