From 150fd1fed34d0bacc3abda25e7736da3e6b539a3 Mon Sep 17 00:00:00 2001
From: Roman Mogylatov <rmogilatov@gmail.com>
Date: Mon, 8 Mar 2021 16:18:11 -0500
Subject: [PATCH] Fix flake8 errors and update changelog

---
 docs/main/changelog.rst           | 6 ++++++
 src/dependency_injector/wiring.py | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index f583f705..8694f644 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -7,6 +7,12 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+Development version
+-------------------
+- Fix wiring to not crash on missing signatures.
+  See issue: `#420 <https://github.com/ets-labs/python-dependency-injector/issues/420>`_.
+  Thanks to `@Balthus1989 <https://github.com/Balthus1989>`_ for reporting the issue.
+
 4.29.1
 ------
 - Fix recursive copying issue in ``Delegate`` provider.
diff --git a/src/dependency_injector/wiring.py b/src/dependency_injector/wiring.py
index 3318ea99..a818fb75 100644
--- a/src/dependency_injector/wiring.py
+++ b/src/dependency_injector/wiring.py
@@ -481,7 +481,7 @@ def _unpatch_attribute(patched: PatchedAttribute) -> None:
     setattr(patched.member, patched.name, patched.marker)
 
 
-def _fetch_reference_injections(
+def _fetch_reference_injections(  # noqa: C901
         fn: Callable[..., Any],
 ) -> Tuple[Dict[str, Any], Dict[str, Any]]:
     # Hotfix, see: