From 108f675190b57bda9c67ae6c9dbfadf6b3fa2236 Mon Sep 17 00:00:00 2001
From: Jacob Walls <jacobtylerwalls@gmail.com>
Date: Sat, 10 Sep 2022 18:26:49 -0400
Subject: [PATCH] Stop detecting modules compiled by `cffi` as namespace
 packages

---
 ChangeLog                           | 4 ++++
 astroid/interpreter/_import/util.py | 8 +++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 142a9a7e0b..ab8ac586d8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -17,6 +17,10 @@ What's New in astroid 2.12.10?
 ==============================
 Release date: TBA
 
+* Fixed a crash when introspecting modules compiled by `cffi`.
+
+  Closes #1776
+  Closes PyCQA/pylint#7399
 
 
 What's New in astroid 2.12.9?
diff --git a/astroid/interpreter/_import/util.py b/astroid/interpreter/_import/util.py
index 8cdb8ea19d..c9466999ab 100644
--- a/astroid/interpreter/_import/util.py
+++ b/astroid/interpreter/_import/util.py
@@ -49,7 +49,13 @@ def is_namespace(modname: str) -> bool:
                 # .pth files will be on sys.modules
                 # __spec__ is set inconsistently on PyPy so we can't really on the heuristic here
                 # See: https://foss.heptapod.net/pypy/pypy/-/issues/3736
-                return sys.modules[modname].__spec__ is None and not IS_PYPY
+                # Check first fragment of modname, e.g. "astroid", not "astroid.interpreter"
+                # because of cffi's behavior
+                # See: https://github.com/PyCQA/astroid/issues/1776
+                return (
+                    sys.modules[processed_components[0]].__spec__ is None
+                    and not IS_PYPY
+                )
             except KeyError:
                 return False
             except AttributeError: