patch 8.2.1473: items in a list given to :const can still be modified Commit: https://github.com/vim/vim/commit/021bda56710d98c09a6b35610a476ab2dd8c58ad Author: Bram Moolenaar <Bram@vim.org> Date: Mon Aug 17 21:07:22 2020 +0200 patch 8.2.1473: items in a list given to :const can still be modified Problem: Items in a list given to :const can still be modified. Solution: Work like ":lockvar! name" but don't lock referenced items. Make locking a blob work.

--- a/src/eval.c
+++ b/src/eval.c
@@ -1218,6 +1218,8 @@ set_var_lval(
 		semsg(_(e_letwrong), op);
 		return;
 	    }
+	    if (var_check_lock(lp->ll_blob->bv_lock, lp->ll_name, FALSE))
+		return;
 
 	    if (lp->ll_range && rettv->v_type == VAR_BLOB)
 	    {