patch 8.2.2760: Vim9: no error for changing a for loop variable Commit: https://github.com/vim/vim/commit/f6a8d420a8d2924737f713de046947dcb487550c Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 13 21:48:03 2021 +0200 patch 8.2.2760: Vim9: no error for changing a for loop variable Problem: Vim9: no error for changing a for loop variable. Solution: Make the loop variable read-only. (issue https://github.com/vim/vim/issues/8102)

--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -7590,7 +7590,7 @@ compile_for(char_u *arg_start, cctx_T *c
 
 	    // Reserve a variable to store "var".
 	    // TODO: check for type
-	    var_lvar = reserve_local(cctx, arg, varlen, FALSE, &t_any);
+	    var_lvar = reserve_local(cctx, arg, varlen, TRUE, &t_any);
 	    if (var_lvar == NULL)
 		// out of memory or used as an argument
 		goto failed;