patch 9.0.0198: ml_get error when switching buffer in Visual mode Commit: https://github.com/vim/vim/commit/cfeb8a584be11758cf71ae02f6c937b06d6bb66f Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 13 14:09:44 2022 +0100 patch 9.0.0198: ml_get error when switching buffer in Visual mode Problem: ml_get error when switching buffer in Visual mode. Solution: End Visual mode when switching buffer. (closes https://github.com/vim/vim/issues/10902)

--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1818,6 +1818,14 @@ set_curbuf(buf_T *buf, int action)
     static void
 enter_buffer(buf_T *buf)
 {
+    // when closing the current buffer stop Visual mode
+    if (VIsual_active
+#if defined(EXITFREE)
+	    && !entered_free_all_mem
+#endif
+	    )
+	end_visual_mode();
+
     // Get the buffer in the current window.
     curwin->w_buffer = buf;
     curbuf = buf;