* Additional _disposed checks.

Author: lukebakken

projects/RabbitMQ.Client/Impl/Channel.cs

@@ -529,6 +529,11 @@ void IDisposable.Dispose()
 
         protected virtual void Dispose(bool disposing)
         {
+            if (_disposed)
+            {
+                return;
+            }
+
             if (IsDisposing)
             {
                 return;
@@ -559,6 +564,11 @@ protected virtual void Dispose(bool disposing)
 
         public async ValueTask DisposeAsync()
         {
+            if (_disposed)
+            {
+                return;
+            }
+
             await DisposeAsyncCore()
                 .ConfigureAwait(false);
 
@@ -567,6 +577,11 @@ await DisposeAsyncCore()
 
         protected virtual async ValueTask DisposeAsyncCore()
         {
+            if (_disposed)
+            {
+                return;
+            }
+
             if (IsDisposing)
             {
                 return;