patch 8.2.2942: Vim9: error when calling function with too few arguments Commit: https://github.com/vim/vim/commit/8da6d6db340069b3307e6bce3cdd40441197efce Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 5 18:15:09 2021 +0200 patch 8.2.2942: Vim9: error when calling function with too few arguments Problem: Vim9: internal error when calling function with too few arguments Solution: Check for argument count to be too few. (closes https://github.com/vim/vim/issues/8325)

--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -4234,6 +4234,14 @@ call_def_function(
 	    semsg(_(e_nr_arguments_too_many), idx);
 	goto failed_early;
     }
+    else if (idx < 0)
+    {
+	if (idx == -1)
+	    emsg(_(e_one_argument_too_few));
+	else
+	    semsg(_(e_nr_arguments_too_few), -idx);
+	goto failed_early;
+    }
 
     // Put arguments on the stack, but no more than what the function expects.
     // A lambda can be called with more arguments than it uses.