fixup! Contain fibers and open ports in HTTP::Client and HTTP::WebSoc…

…ket specs

spec/std/http/client/client_spec.cr

@@ -5,7 +5,7 @@ require "http/server"
 
 private def test_server(host, port, read_time = 0)
   server = TCPServer.new(host, port)
-  server_done = Channel(Nil).new
+  server_done = Channel(Exception?).new
 
   spawn do
     io = server.accept
@@ -17,7 +17,9 @@ private def test_server(host, port, read_time = 0)
     ensure
       io.close
     end
-  ensure
+  rescue exc
+    server_done.send exc
+  else
     server_done.send nil
   end
 
@@ -26,7 +28,9 @@ private def test_server(host, port, read_time = 0)
   ensure
     server.close
 
-    server_done.receive
+    if exc = server_done.receive
+      raise exc
+    end
   end
 end