diff --git a/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt b/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt
index b9193988..1bd68fd7 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt
@@ -1658,7 +1658,11 @@ class ActPost : AppCompatActivity(), View.OnClickListener, PostAttachment.Callba
 		// 投稿画面ごとに1スレッドだけ作成してバックグラウンド処理を行う
 		attachment_queue.add(AttachmentRequest(account, pa, uri, mime_type, onUploadEnd))
 		val oldWorker = attachment_worker
-		if(oldWorker == null || ! oldWorker.isAlive || oldWorker.isInterrupted) {
+		if(oldWorker == null
+			|| ! oldWorker.isAlive
+			|| oldWorker.isInterrupted
+			|| oldWorker.isCancelled.get()
+		) {
 			oldWorker?.cancel()
 			attachment_worker = AttachmentWorker().apply { start() }
 		} else {
@@ -1668,7 +1672,8 @@ class ActPost : AppCompatActivity(), View.OnClickListener, PostAttachment.Callba
 	
 	inner class AttachmentWorker : WorkerBase() {
 		
-		private val isCancelled = AtomicBoolean(false)
+		internal val isCancelled = AtomicBoolean(false)
+
 		override fun cancel() {
 			isCancelled.set(true)
 			notifyEx()
@@ -1679,7 +1684,7 @@ class ActPost : AppCompatActivity(), View.OnClickListener, PostAttachment.Callba
 				while(! isCancelled.get()) {
 					val item = attachment_queue.poll()
 					if(item == null) {
-						waitEx(86400)
+						waitEx(86400000L)
 						continue
 					}
 					val result = item.upload()
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/CharacterGroup.kt b/app/src/main/java/jp/juggler/subwaytooter/util/CharacterGroup.kt
index 65486e6f..167ef015 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/CharacterGroup.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/CharacterGroup.kt
@@ -48,16 +48,16 @@ class CharacterGroup {
 		// 空白とみなす文字なら真
 		fun isWhitespace(cp : Int) : Boolean  = mapWhitespace.get(cp,false)
 
-		internal val reWhitespace :Pattern by lazy {
-			val sb = StringBuilder()
-			sb.append("[\\s\\t\\x0d\\x0a")
-			for(i in 0 until mapWhitespace.size()){
-				val k = mapWhitespace.keyAt(i)
-				if( k > 0x20 ) sb.append(k.toChar())
-			}
-			sb.append("]+")
-			 Pattern.compile(sb.toString())
-		}
+		internal val reWhitespace =Pattern.compile(
+			StringBuilder().apply{
+				 append("[\\s\\t\\x0d\\x0a")
+				 for(i in 0 until mapWhitespace.size()){
+					 val k = mapWhitespace.keyAt(i)
+					 if( k > 0x20 ) append(k.toChar())
+				 }
+				 append("]+")
+			 }.toString()
+		)
 		
 		
 		// 文字列のリストからグループIDを決定する