patch 8.1.0856: when scrolling a window the cursorline is not always updated commit https://github.com/vim/vim/commit/bbb5f8d4c2cbc5f48556008875f57cbe7fc4ac6c Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jan 31 13:22:32 2019 +0100 patch 8.1.0856: when scrolling a window the cursorline is not always updated Problem: When scrolling a window other than the current one the cursorline highlighting is not always updated. (Jason Franklin) Solution: Call redraw_for_cursorline() after scrolling. Only set w_last_cursorline when drawing the cursor line. Reset the lines to be redrawn also when redrawing the whole window.

/* if_ole.cpp */
void InitOLE(int* pbDoRestart);
void UninitOLE(void);
void RegisterMe(int silent);
void UnregisterMe(int bNotifyUser);