From bd7919e03d1d1fd14b30cfa9211b2a51a00f81ba Mon Sep 17 00:00:00 2001
From: q0w <43147888+q0w@users.noreply.github.com>
Date: Sat, 21 Jan 2023 14:19:54 +0300
Subject: [PATCH] Initialize args and args_source during Config.__init__

Closes #10626

Co-authored-by: Bruno Oliveira <nicoddemus@gmail.com>
---
 AUTHORS                        | 1 +
 changelog/10626.bugfix.rst     | 1 +
 src/_pytest/config/__init__.py | 6 ++++--
 testing/python/fixtures.py     | 4 ++++
 4 files changed, 10 insertions(+), 2 deletions(-)
 create mode 100644 changelog/10626.bugfix.rst

diff --git a/AUTHORS b/AUTHORS
index cd5b71ffb..fe60b6865 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -290,6 +290,7 @@ Prashant Sharma
 Pulkit Goyal
 Punyashloka Biswal
 Quentin Pradet
+q0w
 Ralf Schmitt
 Ralph Giles
 Ram Rachum
diff --git a/changelog/10626.bugfix.rst b/changelog/10626.bugfix.rst
new file mode 100644
index 000000000..c3c7ef778
--- /dev/null
+++ b/changelog/10626.bugfix.rst
@@ -0,0 +1 @@
+Fix crash if ``--fixtures`` and ``--help`` are passed at the same time.
diff --git a/src/_pytest/config/__init__.py b/src/_pytest/config/__init__.py
index 5c0c62108..a08a965a6 100644
--- a/src/_pytest/config/__init__.py
+++ b/src/_pytest/config/__init__.py
@@ -1005,6 +1005,8 @@ class Config:
         self.hook.pytest_addoption.call_historic(
             kwargs=dict(parser=self._parser, pluginmanager=self.pluginmanager)
         )
+        self.args_source = Config.ArgsSource.ARGS
+        self.args: List[str] = []
 
         if TYPE_CHECKING:
             from _pytest.cacheprovider import Cache
@@ -1344,8 +1346,8 @@ class Config:
 
     def parse(self, args: List[str], addopts: bool = True) -> None:
         # Parse given cmdline arguments into this config object.
-        assert not hasattr(
-            self, "args"
+        assert (
+            self.args == []
         ), "can only parse cmdline args at most once per Config object"
         self.hook.pytest_addhooks.call_historic(
             kwargs=dict(pluginmanager=self.pluginmanager)
diff --git a/testing/python/fixtures.py b/testing/python/fixtures.py
index 3ce5cb34d..d996f80bb 100644
--- a/testing/python/fixtures.py
+++ b/testing/python/fixtures.py
@@ -3338,6 +3338,10 @@ class TestShowFixtures:
         config = pytester.parseconfigure("--funcargs")
         assert config.option.showfixtures
 
+    def test_show_help(self, pytester: Pytester) -> None:
+        result = pytester.runpytest("--fixtures", "--help")
+        assert not result.ret
+
     def test_show_fixtures(self, pytester: Pytester) -> None:
         result = pytester.runpytest("--fixtures")
         result.stdout.fnmatch_lines(