fix(terminal): guard os.getcwd() against deleted CWD in _get_env_config

tests/tools/test_terminal_cleanup_cwd.py

@@ -0,0 +1,38 @@
+"""Regression test for #33367: _get_env_config should not raise when CWD is deleted."""
+
+import os
+from unittest.mock import patch
+
+
+def test_get_env_config_handles_deleted_cwd(monkeypatch):
+    """When os.getcwd() raises FileNotFoundError (e.g. tmpfs cleanup on Arch
+    Linux), _get_env_config should fall back to the home directory instead of
+    propagating the error.  See #33367."""
+    from tools import terminal_tool as tt
+
+    def _raise_fnf(*a, **kw):
+        raise FileNotFoundError("No such file or directory")
+
+    monkeypatch.setattr(os, "getcwd", _raise_fnf)
+    monkeypatch.setenv("TERMINAL_ENV", "local")
+
+    config = tt._get_env_config()
+
+    assert config["env_type"] == "local"
+    assert config["cwd"] == os.path.expanduser("~")
+
+
+def test_get_env_config_handles_oserror_on_cwd(monkeypatch):
+    """os.getcwd() can also raise OSError (errno 10: no current directory)."""
+    from tools import terminal_tool as tt
+
+    def _raise_os(*a, **kw):
+        raise OSError(10, "No current process")
+
+    monkeypatch.setattr(os, "getcwd", _raise_os)
+    monkeypatch.setenv("TERMINAL_ENV", "local")
+
+    config = tt._get_env_config()
+
+    assert config["env_type"] == "local"
+    assert config["cwd"] == os.path.expanduser("~")

tools/terminal_tool.py

@@ -953,7 +953,13 @@ def _get_env_config() -> Dict[str, Any]:
     # remote home, and everything else starts in the backend's default
     # root-like cwd.
     if env_type == "local":
-        default_cwd = os.getcwd()
+        try:
+            default_cwd = os.getcwd()
+        except (FileNotFoundError, OSError):
+            # CWD may have been deleted (e.g. tmpfs cleanup on Arch Linux).
+            # Fall back to the home directory so the cleanup thread does not
+            # spam errors.log every 60 seconds.  See #33367.
+            default_cwd = os.path.expanduser("~")
     elif env_type == "ssh":
         default_cwd = "~"
     else: