Fix ambiguous coroutineContext

Author: Mygod

core/build.gradle.kts

@@ -66,7 +66,7 @@ tasks.register<Exec>("cargoClean") {
 tasks.clean.dependsOn("cargoClean")
 
 dependencies {
-    val coroutinesVersion = "1.3.6"
+    val coroutinesVersion = "1.3.7"
     val roomVersion = "2.2.5"
     val workVersion = "2.4.0-beta01"
 

core/src/main/java/com/github/shadowsocks/subscription/SubscriptionService.kt

@@ -95,9 +95,7 @@ class SubscriptionService : Service(), CoroutineScope {
                 }
                 Core.notification.notify(NOTIFICATION_ID, notification.build())
                 counter = 0
-                val workers = urls.asIterable().map { url ->
-                    async(Dispatchers.IO) { fetchJson(url, urls.size(), notification) }
-                }
+                val workers = urls.asIterable().map { url -> fetchJsonAsync(url, urls.size(), notification) }
                 try {
                     val localJsons = workers.awaitAll()
                     withContext(Dispatchers.Main) {
@@ -127,20 +125,20 @@ class SubscriptionService : Service(), CoroutineScope {
         return START_NOT_STICKY
     }
 
-    private suspend fun fetchJson(url: URL, max: Int, notification: NotificationCompat.Builder): File? {
+    private fun fetchJsonAsync(url: URL, max: Int, notification: NotificationCompat.Builder) = async(Dispatchers.IO) {
         val tempFile = File.createTempFile("subscription-", ".json", cacheDir)
         try {
             (url.openConnection() as HttpURLConnection).useCancellable {
                 tempFile.outputStream().use { out -> inputStream.copyTo(out) }
             }
-            return tempFile
+            tempFile
         } catch (e: IOException) {
             Timber.d(e)
             launch(Dispatchers.Main) {
                 Toast.makeText(this@SubscriptionService, e.readableMessage, Toast.LENGTH_LONG).show()
             }
             if (!tempFile.delete()) tempFile.deleteOnExit()
-            return null
+            null
         } finally {
             withContext(Dispatchers.Main) {
                 counter += 1