Simplify connection closing

CHANGELOG.rst

@@ -2,6 +2,9 @@
 Changelog
 =========
 
+dev
+* Simplify connection closing code
+
 1.7.0 (2021-03-22)
 ------------------
 

src/manhole/__init__.py

@@ -313,25 +313,17 @@ def handle_connection_repl(client):
             # Change the switch/check interval to something ridiculous. We don't want to have other thread try
             # to write to the redirected sys.__std*/sys.std* - it would fail horribly.
             setinterval(2147483647)
-            try:
-                client.close()  # close before it's too late. it may already be dead
-            except IOError:
-                pass
-            junk = []  # keep the old file objects alive for a bit
+
             for name, fh in backup:
-                junk.append(getattr(sys, name))
-                setattr(sys, name, fh)
-            del backup
-            for fh in junk:
                 try:
-                    if hasattr(fh, 'detach'):
-                        fh.detach()
-                    else:
-                        fh.close()
+                    getattr(sys, name).close()
                 except IOError:
                     pass
-                del fh
-            del junk
+                setattr(sys, name, fh)
+            try:
+                client.close()
+            except IOError:
+                pass
         finally:
             setinterval(old_interval)
             _LOG("Cleaned up.")