From 5f25c3855071bd7e26255c68bf458b1b5cf92f39 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 9 Jan 2022 13:36:28 +0000
Subject: [PATCH] patch 8.2.4049: Vim9: reading before the start of the line
 with "$"

Problem:    Vim9: reading before the start of the line with "$" by itself.
Solution:   Do not subtract one when reporting the error.
---
 src/testdir/test_vim9_expr.vim | 1 +
 src/version.c                  | 2 ++
 src/vim9expr.c                 | 2 +-
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index 01b45385084e5..52237e33fdfe8 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -2853,6 +2853,7 @@ def Test_expr7_environment()
   CheckDefAndScriptSuccess(lines)
 
   CheckDefAndScriptFailure(["var x = $$$"], ['E1002:', 'E15:'], 1)
+  CheckDefAndScriptFailure(["$"], ['E1002:', 'E15:'], 1)
 enddef
 
 def Test_expr7_register()
diff --git a/src/version.c b/src/version.c
index be49f09e2b500..cf0665c02ce5b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4049,
 /**/
     4048,
 /**/
diff --git a/src/vim9expr.c b/src/vim9expr.c
index 83c68a9ffa283..edaee509976af 100644
--- a/src/vim9expr.c
+++ b/src/vim9expr.c
@@ -1233,7 +1233,7 @@ compile_get_env(char_u **arg, cctx_T *cctx)
     len = get_env_len(arg);
     if (len == 0)
     {
-	semsg(_(e_syntax_error_at_str), start - 1);
+	semsg(_(e_syntax_error_at_str), start);
 	return FAIL;
     }