specpdl_unrewind 4040 src/eval.c       specpdl_unrewind (specpdl_ptr, distance, false);
specpdl_unrewind 4607 src/lisp.h     void specpdl_unrewind (union specbinding *pdl, int distance, bool vars_only);
specpdl_unrewind   91 src/thread.c     specpdl_unrewind (specpdl_ptr, -distance, true);
specpdl_unrewind   98 src/thread.c     specpdl_unrewind (thr->m_specpdl_ptr, distance, true);