patch 8.2.2289: Vim9: 'cpo' can become empty Commit: https://github.com/vim/vim/commit/e5a2dc87fd9d63dfd0d9c379e363ee8b8c05b14c Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 3 19:52:05 2021 +0100 patch 8.2.2289: Vim9: 'cpo' can become empty Problem: Vim9: 'cpo' can become empty. Solution: Use empty_option instead of an empty string. Update quickfix buffer after restoring 'cpo'. (closes #7608)

--- a/src/ex_eval.c
+++ b/src/ex_eval.c
@@ -1695,7 +1695,7 @@ ex_catch(exarg_T *eap)
 		    *end = NUL;
 		}
 		save_cpo  = p_cpo;
-		p_cpo = (char_u *)"";
+		p_cpo = empty_option;
 		// Disable error messages, it will make current_exception
 		// invalid.
 		++emsg_off;