# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1600116303 -7200
# Node ID 753452747ae5b08da6a385c6cdfce43a3424aeed
# Parent  216928dbf0788439f980d1375994f8e96e4e5990
patch 8.2.1687: Vim9: out of bounds error

Commit: https://github.com/vim/vim/commit/9b123d859053ad1fb91d38334726b9f24da39930
Author: Bram Moolenaar <Bram@vim.org>
Date:   Mon Sep 14 22:39:11 2020 +0200

    patch 8.2.1687: Vim9: out of bounds error

    Problem:    Vim9: out of bounds error.
    Solution:   Check that cmdidx is not negative.

diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1687,
+/**/
     1686,
 /**/
     1685,
diff --git a/src/vim9compile.c b/src/vim9compile.c
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -6903,7 +6903,8 @@ compile_def_function(ufunc_T *ufunc, int
 	if (ea.cmdidx != CMD_SIZE
 			    && ea.cmdidx != CMD_write && ea.cmdidx != CMD_read)
 	{
-	    ea.argt = excmd_get_argt(ea.cmdidx);
+	    if (ea.cmdidx >= 0)
+		ea.argt = excmd_get_argt(ea.cmdidx);
 	    if ((ea.argt & EX_BANG) && *p == '!')
 	    {
 		ea.forceit = TRUE;