patch 8.2.0329: popup filter converts 0x80 bytes Commit: https://github.com/vim/vim/commit/ec084d3356cc2a23f2f44707810c38ab590d2e66 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Feb 28 22:44:47 2020 +0100 patch 8.2.0329: popup filter converts 0x80 bytes Problem: Popup filter converts 0x80 bytes. Solution: Keep 0x80 bytes as-is. (Ozaki Kiichi, closes https://github.com/vim/vim/issues/5706)

--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -2999,7 +2999,7 @@ invoke_popup_filter(win_T *wp, int c)
 
     // Convert the number to a string, so that the function can use:
     //	    if a:c == "\<F2>"
-    buf[special_to_buf(c, mod_mask, TRUE, buf)] = NUL;
+    buf[special_to_buf(c, mod_mask, FALSE, buf)] = NUL;
     argv[1].v_type = VAR_STRING;
     argv[1].vval.v_string = vim_strsave(buf);