From cc8b1a9f2241e087330195c76651c5f9d9519e2f Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Sat, 7 Mar 2026 16:46:10 +0900
Subject: [PATCH] Fix basevalue access before empty string check in
 parseIntoTree

l:basevalue[1] was accessed before checking if l:basevalue is empty.
Moved the empty check first so l:basedirect is only computed when
l:basevalue is non-empty.
---
 autoload/emmet/lang/html.vim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/autoload/emmet/lang/html.vim b/autoload/emmet/lang/html.vim
index dfb04b9..86c0313 100644
--- a/autoload/emmet/lang/html.vim
+++ b/autoload/emmet/lang/html.vim
@@ -156,10 +156,11 @@ function! emmet#lang#html#parseIntoTree(abbr, type) abort
       endif
     endif
 
-    let l:basedirect = l:basevalue[1] ==# '-' ? -1 : 1
     if l:basevalue != ''
+      let l:basedirect = l:basevalue[1] ==# '-' ? -1 : 1
       let l:basevalue = 0 + abs(l:basevalue[1:])
     else
+      let l:basedirect = 1
       let l:basevalue = 1
     endif
     if l:multiplier <= 0 | let l:multiplier = 1 | endif