When I start Emacs with ./src/emacs -Q src/print.c -f outline-minor-mode -f outline-hide-other --eval '(progn (pop-to-buffer "print.c") (while t (next-line) (redisplay)))' it crashes like so: marker.c:331: Emacs fatal error: assertion failed: BUF_BEG_BYTE (b) <= bytepos && bytepos <= BUF_Z_BYTE (b) Fatal error 6: Aborted The backtrace is attached.