all teardown callbacks are called despite errors

tests/test_appctx.py

@@ -1,7 +1,10 @@
+import sys
+
 import pytest
 
 import flask
 from flask.globals import app_ctx
+from flask.testing import FlaskClient
 
 
 def test_basic_url_generation(app):
@@ -208,3 +211,55 @@ def test_clean_pop(app):
 
     assert called == ["flask_test", "TEARDOWN"]
     assert not flask.current_app
+
+
+def test_robust_teardown(app: flask.Flask, client: FlaskClient) -> None:
+    count = 0
+
+    @app.teardown_request
+    def request_teardown(e: Exception | None) -> None:
+        nonlocal count
+        count += 1
+        raise ValueError("request_teardown")
+
+    @app.teardown_appcontext
+    def app_teardown(e: Exception | None) -> None:
+        nonlocal count
+        count += 1
+        raise ValueError("app_teardown")
+
+    @app.get("/")
+    def index() -> str:
+        return ""
+
+    def request_signal(sender: flask.Flask, exc: Exception | None) -> None:
+        nonlocal count
+        count += 1
+        raise ValueError("request_signal")
+
+    def app_signal(sender: flask.Flask, exc: Exception | None) -> None:
+        nonlocal count
+        count += 1
+        raise ValueError("app_signal")
+
+    with (
+        flask.request_tearing_down.connected_to(request_signal, app),
+        flask.appcontext_tearing_down.connected_to(app_signal, app),
+    ):
+        if sys.version_info >= (3, 11):
+            with pytest.raises(ExceptionGroup, match="context teardown") as exc_info:  # noqa: F821
+                client.get()
+
+            assert len(exc_info.value.exceptions) == 2
+            eg1, eg2 = exc_info.value.exceptions
+            assert isinstance(eg1, ExceptionGroup)  # noqa: F821
+            assert "request teardown" in eg1.message
+            assert len(eg1.exceptions) == 2
+            assert isinstance(eg2, ExceptionGroup)  # noqa: F821
+            assert "app teardown" in eg2.message
+            assert len(eg2.exceptions) == 2
+        else:
+            with pytest.raises(ValueError, match="request_teardown"):
+                client.get()
+
+    assert count == 4