[GR-38139] Fix several transient issues with MRI tests and fix #owner MRI tests

PullRequest: truffleruby/3302

Author: eregon

test/mri/excludes/TestHash/TestSubHash.rb

@@ -1,3 +1,4 @@
+exclude :test_ar2st, "mutating Hash during key.hash"
 exclude :test_ASET_fstring_key, "needs investigation"
 exclude :test_ASET_fstring_non_literal_key, "needs investigation"
 exclude :test_NEWHASH_fstring_key, "needs investigation"

test/mri/excludes/TestIO.rb

@@ -71,3 +71,4 @@
 exclude :test_fcntl_lock_linux, "needs investigation"
 exclude :test_copy_stream_megacontent_nonblock, "needs investigation"
 exclude :test_select_memory_leak, "needs investigation"
+exclude :test_race_gets_and_close, "transient"

test/mri/excludes/TestSetTraceFunc.rb

@@ -140,3 +140,4 @@
 exclude :test_tracepoint_with_multithreads, "needs investigation"
 exclude :test_while_in_while, "needs investigation"
 exclude :test_tracepoint_enable_with_target_line_two_times, "needs investigation"
+exclude :test_tracpoint_memory_leak, "transient timeout"

test/mri/tests/ruby/test_method.rb

@@ -1057,8 +1057,8 @@ def test_super_method_removed
 
   def test_prepended_public_zsuper
     mod = EnvUtil.labeled_module("Mod") {private def foo; :ok end}
-    mods = [mod]
     obj = Object.new.extend(mod)
+    mods = [obj.singleton_class]
     class << obj
       public :foo
     end
@@ -1299,7 +1299,7 @@ module M2
       ::Object.prepend(M2)
 
       m = Object.instance_method(:x)
-      assert_equal M, m.owner
+      assert_equal M2, m.owner
     end;
   end