diff --git a/selector/src/commonMain/kotlin/li/songe/selector/Version.kt b/selector/src/commonMain/kotlin/li/songe/selector/Version.kt
deleted file mode 100644
index 372a736d5..000000000
--- a/selector/src/commonMain/kotlin/li/songe/selector/Version.kt
+++ /dev/null
@@ -1,8 +0,0 @@
-package li.songe.selector
-
-import kotlin.js.ExperimentalJsExport
-import kotlin.js.JsExport
-
-@OptIn(ExperimentalJsExport::class)
-@JsExport
-const val version = "0.0.6"
diff --git a/selector/src/commonMain/kotlin/li/songe/selector/parser/ParserSet.kt b/selector/src/commonMain/kotlin/li/songe/selector/parser/ParserSet.kt
index d96661683..e78de7405 100644
--- a/selector/src/commonMain/kotlin/li/songe/selector/parser/ParserSet.kt
+++ b/selector/src/commonMain/kotlin/li/songe/selector/parser/ParserSet.kt
@@ -198,9 +198,12 @@ internal object ParserSet {
         ExtSyntaxError.assert(source, i, prefix)
         val startChar = source[i]
         i++
+        if (i >= source.length) {
+            ExtSyntaxError.throwError(source, i, "any char")
+        }
         var data = ""
         while (source[i] != startChar) {
-            if (i == source.length - 1) {
+            if (i >= source.length - 1) {
                 ExtSyntaxError.assert(source, i, startChar.toString())
                 break
             }
@@ -442,7 +445,10 @@ internal object ParserSet {
         val selectorList = mutableListOf<Pair<ConnectSegment, PropertySegment>>()
         while (i < source.length && whiteCharParser.prefix.contains(source[i])) {
             i += whiteCharStrictParser(source, i).length
-            val combinator = if (combinatorParser.prefix.contains((source[i]))) {
+            if (i >= source.length) {
+                break
+            }
+            val combinator = if (combinatorParser.prefix.contains(source[i])) {
                 val combinatorResult = combinatorParser(source, i)
                 i += combinatorResult.length
                 i += whiteCharStrictParser(source, i).length
diff --git a/selector/src/jvmTest/kotlin/li/songe/selector/ParserTest.kt b/selector/src/jvmTest/kotlin/li/songe/selector/ParserTest.kt
index 3c88a9cab..ab057205d 100644
--- a/selector/src/jvmTest/kotlin/li/songe/selector/ParserTest.kt
+++ b/selector/src/jvmTest/kotlin/li/songe/selector/ParserTest.kt
@@ -72,10 +72,9 @@ class ParserTest {
     }
 
     @Test
-    fun check_query(){
+    fun check_query() {
         val projectCwd = File("../").absolutePath
-        val text =
-            "@TextView[text^='跳过'] + LinearLayout TextView[text*=`跳转`]"
+        val text = "@TextView[text^='跳过'] + LinearLayout TextView[text*=`跳转`]"
         val selector = Selector.parse(text)
         println("selector: $selector")
         println(selector.trackIndex)
@@ -94,8 +93,8 @@ class ParserTest {
             }
         }
         val transform = Transform<TestNode>(getAttr = { node, name ->
-            if (name=="_id") return@Transform  node.id
-            if (name=="_pid") return@Transform  node.pid
+            if (name == "_id") return@Transform node.id
+            if (name == "_pid") return@Transform node.pid
             val value = node.attr[name] ?: return@Transform null
             if (value is JsonNull) return@Transform null
             value.intOrNull ?: value.booleanOrNull ?: value.content
@@ -106,4 +105,11 @@ class ParserTest {
         println("target_size: " + targets.size)
         println(targets.firstOrNull())
     }
+
+    @Test
+    fun check_quote() {
+//        https://github.com/gkd-kit/inspect/issues/7
+        val selector = Selector.parse("a[a=''] ")
+        println("check_quote:$selector")
+    }
 }
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