Skip a possibly flaky test

rust-futures.spec

@@ -212,7 +212,9 @@ use the "write-all-vectored" feature of the "%{crate}" crate.
 %if %{with check}
 %check
 # * always skip a test that is officially "flaky"
-%cargo_test -a -- -- --skip stream_select
+# * skip a possibly flaky test:
+#   https://github.com/rust-lang/futures-rs/issues/2539
+%cargo_test -a -- -- --skip stream_select --skip many_threads
 %endif
 
 %changelog