Check if the instance inherits from a standard exception before unproxying.

1 files changed, 1 insertions, 1 deletions

diff --git a/checkers/exceptions.py b/checkers/exceptions.py
index 0142d9a..cd78719 100644
--- a/checkers/exceptions.py
+++ b/checkers/exceptions.py
@@ -291,7 +291,7 @@ class ExceptionsChecker(BaseChecker):
                 for part, exc in excs:
                     if exc is YES:
                         continue
-                    if isinstance(exc, astroid.Instance):
+                    if isinstance(exc, astroid.Instance) and inherit_from_std_ex(exc):
                         exc = exc._proxied
                     if not isinstance(exc, astroid.Class):
                         # Don't emit the warning if the infered stmt