fix #1825

Author: sumneko

Diff for: changelog.md

@@ -1,6 +1,9 @@
 # changelog
 
 ## 3.6.6
+* `FIX` [#1825]
+
+[#1825]: https://github.com/sumneko/lua-language-server/issues/1825
 
 ## 3.6.5
 `2023-1-16`

Diff for: script/parser/compile.lua

@@ -433,7 +433,7 @@ local function resolveLongString(finishMark)
     end
     if finishMark == ']]' and State.version == 'Lua 5.1' then
         local nestOffset = sfind(Lua, '[[', start, true)
-        if nestOffset then
+        if nestOffset and nestOffset < finishOffset then
             fastForwardToken(nestOffset)
             local nestStartPos = getPosition(nestOffset, 'left')
             local nestFinishPos = getPosition(nestOffset + 1, 'right')