Fix crash in CoroutineQueue (#421)

Author: mickael-menu

readium/shared/src/main/java/org/readium/r2/shared/util/CoroutineQueue.kt

@@ -31,6 +31,8 @@ public class CoroutineQueue(
     private val scope: CoroutineScope =
         CoroutineScope(dispatcher + SupervisorJob())
 
+    private val tasks: Channel<Task<*>> = Channel(Channel.UNLIMITED)
+
     init {
         scope.launch {
             for (task in tasks) {
@@ -79,8 +81,6 @@ public class CoroutineQueue(
         scope.cancel(cause)
     }
 
-    private val tasks: Channel<Task<*>> = Channel(Channel.UNLIMITED)
-
     private class Task<T>(
         val task: suspend () -> T,
         val deferred: CompletableDeferred<T>? = null

test-app/src/main/java/org/readium/r2/testapp/utils/CoroutineQueue.kt

@@ -29,6 +29,8 @@ class CoroutineQueue(
     private val scope: CoroutineScope =
         CoroutineScope(dispatcher + SupervisorJob())
 
+    private val tasks: Channel<Task<*>> = Channel(Channel.UNLIMITED)
+
     init {
         scope.launch {
             for (task in tasks) {
@@ -77,8 +79,6 @@ class CoroutineQueue(
         scope.cancel(cause)
     }
 
-    private val tasks: Channel<Task<*>> = Channel(Channel.UNLIMITED)
-
     private class Task<T>(
         val task: suspend () -> T,
         val deferred: CompletableDeferred<T>? = null