commit 79e8db9a218ef111934594024a5cd8b1f93acada
author Bram Moolenaar <Bram@vim.org> Fri Aug 14 22:16:33 2020 +0200
committer Bram Moolenaar <Bram@vim.org> Fri Aug 14 22:16:33 2020 +0200
tree 980ed11ba0d24efa15ee4e10f628f54553ac697f
parent 8de2f44ac6af2276587a2e44a0d5fe1dc6789eb3

patch 8.2.1454: Vim9: failure invoking lambda with wrong arguments

Problem:    Vim9: failure invoking lambda with wrong arguments.
Solution:   Handle invalid arguments.  Add a test.

src/vim9execute.c

diff --git a/src/vim9execute.c b/src/vim9execute.c
index c87ac79..0f7f18c3 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -206,7 +206,10 @@
     arg_to_add = ufunc->uf_args.ga_len - argcount;
     if (arg_to_add < 0)
     {
-	iemsg("Argument count wrong?");
+	if (arg_to_add == -1)
+	    emsg(_("E1106: one argument too many"));
+	else
+	    semsg(_("E1106: %d arguments too many"), -arg_to_add);
 	return FAIL;
     }
     if (ga_grow(&ectx->ec_stack, arg_to_add + 3