From ceb0a9446728a7095e2f4ff37159d29cc55f1cad Mon Sep 17 00:00:00 2001
From: Alex Willmer <alex@moreati.org.uk>
Date: Sat, 16 Jan 2021 13:17:48 +0000
Subject: [PATCH] Explain why the Python 2.x thread module is blacklisted

Based on the original commit I believe it is only an optimization.
However I could be wrong. I intend to request review of this part.
---
 mitogen/core.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mitogen/core.py b/mitogen/core.py
index 4dd44925..4dcc3d77 100644
--- a/mitogen/core.py
+++ b/mitogen/core.py
@@ -1269,6 +1269,9 @@ class Importer(object):
         # a negative round-trip.
         'builtins',
         '__builtin__',
+
+        # Python 2.x module that was renamed to _thread in 3.x.
+        # This entry avoids a roundtrip on 2.x -> 3.x.
         'thread',
 
         # org.python.core imported by copy, pickle, xml.sax; breaks Jython, but