patch 8.2.2481: Vim9: confusing error when variable arguments have default Commit: https://github.com/vim/vim/commit/4f53b79bf5f8b0de7c6933fd157894ba7a53f35e Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 7 15:59:49 2021 +0100 patch 8.2.2481: Vim9: confusing error when variable arguments have default Problem: Vim9: confusing error when variable arguments have a default value. Solution: Give a specific error message. (closes #7793)

--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -241,6 +241,11 @@ get_function_args(
 									 skip);
 		if (p == arg)
 		    break;
+		if (*skipwhite(p) == '=')
+		{
+		    emsg(_(e_cannot_use_default_for_variable_arguments));
+		    break;
+		}
 	    }
 	}
 	else