change ck_fopen(name, ...) to ck_fopen(input->in_file_name, ...) — sed/execute.c open_next_file(). Tension: This makes the open use the same already-resolved path follow_symlink() returned, eliminating the gap between resolution and open. Outcome: One-line patch matching upstream commit 6b9b43c.

b19a73fa-7d5e-4aca-8206-ff8a9ae6fd94