[PATCH 01 of 11] py3: don't try to mangle C extension blob by code transformer

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1520074245 18000
#      Sat Mar 03 05:50:45 2018 -0500
# Node ID 39f26de931737db2ee20b90925f7b3eb56423a89
# Parent  cdf5ea49828ae71c8340b2806733ce49b4a549da
py3: don't try to mangle C extension blob by code transformer

diff --git a/mercurial/__init__.py b/mercurial/__init__.py
--- a/mercurial/__init__.py
+++ b/mercurial/__init__.py
@@ -31,6 +31,9 @@ if sys.version_info[0] >= 3:
             # Only handle Mercurial-related modules.
             if not fullname.startswith(('mercurial.', 'hgext.', 'hgext3rd.')):
                 return None
+            # don't try to parse binary
+            if fullname.startswith('mercurial.cext.'):
+                return None
             # third-party packages are expected to be dual-version clean
             if fullname.startswith('mercurial.thirdparty'):
                 return None