Add test and changes

CHANGES

@@ -3,6 +3,21 @@ Flask Changelog
 
 Here you can see the full list of changes between each Flask release.
 
+Version 0.13
+------------
+
+Major release, unreleased
+
+- Make `app.run()` into a noop if a Flask application is run from the
+  development server on the command line.  This avoids some behavior that
+  was confusing to debug for newcomers.
+- Change default configuration `JSONIFY_PRETTYPRINT_REGULAR=False`. jsonify()
+  method returns compressed response by default, and pretty response in
+  debug mode.
+- Call `ctx.auto_pop` with the exception object instead of `None`, in the
+  event that a `BaseException` such as `KeyboardInterrupt` is raised in a
+  request handler.
+
 Version 0.12.1
 --------------
 

tests/test_basic.py

@@ -791,6 +791,26 @@ def test_error_handling_processing():
         assert resp.data == b'internal server error'
 
 
+def test_baseexception_error_handling():
+    app = flask.Flask(__name__)
+    app.config['LOGGER_HANDLER_POLICY'] = 'never'
+
+    @app.route('/')
+    def broken_func():
+        raise KeyboardInterrupt()
+
+    with app.test_client() as c:
+        try:
+            c.get('/')
+            raise AssertionError("KeyboardInterrupt should have been raised")
+        except KeyboardInterrupt:
+            pass
+
+        ctx = flask._request_ctx_stack.top
+        assert ctx.preserved
+        assert type(ctx._preserved_exc) is KeyboardInterrupt
+
+
 def test_before_request_and_routing_errors():
     app = flask.Flask(__name__)