From 9bb5a809b52aa519f7e8cefe48faedcad0f7eb2e Mon Sep 17 00:00:00 2001
From: teknium1 <127238744+teknium1@users.noreply.github.com>
Date: Sun, 28 Jun 2026 03:11:03 -0700
Subject: [PATCH] fix(gateway): make zombie check defensive against partial
 psutil stubs

The zombie status probe referenced psutil.Process/NoSuchProcess/Error
unconditionally, which raised AttributeError when psutil is a partial
stub that only defines pid_exists (as in test_windows_native_support's
fallback tests). Guard the probe so any failure to read status degrades
to the authoritative pid_exists() instead of raising.
---
 gateway/status.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/gateway/status.py b/gateway/status.py
index c0798065afe..81e5be95f4d 100644
--- a/gateway/status.py
+++ b/gateway/status.py
@@ -555,13 +555,16 @@ def _pid_exists(pid: int) -> bool:
         # with exit 1 — a silent crash loop under systemd ``Restart=always``,
         # which respawns the gateway before reaping the previous process
         # (issue #42126). Report zombies as dead so the takeover proceeds.
+        # Best-effort: any failure to read status (partial/stub psutil,
+        # access denied, transient race) falls through to the authoritative
+        # ``pid_exists()`` below rather than raising.
         try:
             if psutil.Process(int(pid)).status() == psutil.STATUS_ZOMBIE:
                 return False
-        except psutil.NoSuchProcess:
+        except getattr(psutil, "NoSuchProcess", ()):
             return False
-        except psutil.Error:
-            pass  # Access denied / transient — defer to pid_exists below.
+        except Exception:
+            pass
         return bool(psutil.pid_exists(int(pid)))
 
     except ImportError: