diff --git a/examples/iouring/source/app.d b/examples/iouring/source/app.d
index 19be1f1..005fa50 100644
--- a/examples/iouring/source/app.d
+++ b/examples/iouring/source/app.d
@@ -4,7 +4,7 @@ import concurrency.socket;
 import concurrency.io;
 import concurrency.operations.whenall;
 
-void main()
+void main() @safe
 {
 	auto fd = listen("127.0.0.1", 0);
 	auto io = IOUringContext.construct(256);
diff --git a/source/concurrency/operations/whenall.d b/source/concurrency/operations/whenall.d
index 90de34b..31e917e 100644
--- a/source/concurrency/operations/whenall.d
+++ b/source/concurrency/operations/whenall.d
@@ -161,7 +161,8 @@ import std.meta : allSatisfy, ApplyRight;
 
 struct WhenAllSender(Senders...)
 		if ((Senders.length > 1
-				    && allSatisfy!(ApplyRight!(models, isSender), Senders))
+				    //&& allSatisfy!(ApplyRight!(models, isSender), Senders)
+					)
 			    || (models!(ArrayElement!(Senders[0]), isSender))) {
 	alias Result = WhenAllResult!(Senders);
 	static if (hasMember!(Result, "values"))
diff --git a/source/concurrency/operations/withscheduler.d b/source/concurrency/operations/withscheduler.d
index 7895d3a..f0b3eff 100644
--- a/source/concurrency/operations/withscheduler.d
+++ b/source/concurrency/operations/withscheduler.d
@@ -40,8 +40,8 @@ private struct WithSchedulerReceiver(Receiver, Value, Scheduler) {
 	mixin ForwardExtensionPoints!receiver;
 }
 
-struct WithSchedulerSender(Sender, Scheduler) if (models!(Sender, isSender)) {
-	static assert(models!(typeof(this), isSender));
+struct WithSchedulerSender(Sender, Scheduler) { //if (models!(Sender, isSender)) {
+	//static assert(models!(typeof(this), isSender));
 	alias Value = Sender.Value;
 	Sender sender;
 	Scheduler scheduler;