The rescue clause is needed for the local variable error.

Effectively reverts 486074a.

Author: ioquatix

lib/async/http/protocol/http1/server.rb

@@ -151,6 +151,9 @@ def each(task: Task.current)
 									# Do not remove this line or you will unleash the gods of concurrency hell.
 									task.yield
 								end
+							rescue => error
+								# We store error (as a local variable) for later use in the ensure block.
+								raise
 							ensure
 								body&.close(error)
 							end