[PATCH rfc] rfc: call gc at exit of mercurial

[Maciej Fijalkowski]

# HG changeset patch
# User Maciej Fijalkowski <fijall at gmail.com>
# Date 1459493914 -7200
#      Fri Apr 01 08:58:34 2016 +0200
# Node ID 66b3737b62635691b5a205dafc80e640880b77ca
# Parent  9ca7854b963295b8b56d276b903623ac8277f18d
rfc: call gc at exit of mercurial

This is not a proper patch, just a visualization of a hack I did.
Locks have a __del__, which test-devel-warnings rely on being
called at the exit of a program. Locks also have __exit__ which is
a more proper way to handle locks, but that test does not respect it.
I would like to know what's the proper way of handling this - should
I fix test, should I just call the GC (which will make the command
line tool slower) or what's the proposed solution

diff -r 9ca7854b9632 -r 66b3737b6263 hg
--- a/hg	Thu Mar 31 18:38:08 2016 +0200
+++ b/hg	Fri Apr 01 08:58:34 2016 +0200
@@ -40,4 +40,8 @@
 for fp in (sys.stdin, sys.stdout, sys.stderr):
     mercurial.util.setbinary(fp)
 
-mercurial.dispatch.run()
+try:
+    mercurial.dispatch.run()
+finally:
+    import gc
+    gc.collect()