Chect what remains in TMPDIR

I guess it has a shared library file created by MJIT, but I want to make
sure the fact.

test/rubygems/helper.rb

@@ -466,13 +466,18 @@ def teardown
     Dir.chdir @current_dir
 
     # Prevent a race condition on removing TMPDIR being written by MJIT
-    if defined?(RubyVM::MJIT.enabled?) && RubyVM::MJIT.enabled?
-      RubyVM::MJIT.pause(wait: false)
-    end
-    FileUtils.rm_rf @tempdir
-    if defined?(RubyVM::MJIT.enabled?) && RubyVM::MJIT.enabled?
-      RubyVM::MJIT.resume
-    end
+    #if defined?(RubyVM::MJIT.enabled?) && RubyVM::MJIT.enabled?
+    #  RubyVM::MJIT.pause(wait: false)
+    #end
+    begin
+      FileUtils.rm_rf @tempdir
+    ensure
+      # mame: Temporal code for debugging. Let me confirm what remains in the directory
+      pp Dir.glob(File.join(@tempdir, "**", "{.*,*}")) if $!
+    end
+    #if defined?(RubyVM::MJIT.enabled?) && RubyVM::MJIT.enabled?
+    #  RubyVM::MJIT.resume
+    #end
 
     ENV.replace(@orig_env)