Correct the error handler typing

It may also be awaitable, as invocations are wrapped in ensure_sync.
pallets · Aug 15, 2023 · 84945bf · 84945bf
1 parent c8b014f
commit 84945bf
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/flask/typing.py b/src/flask/typing.py
@@ -77,7 +77,10 @@
 # https://github.com/pallets/flask/issues/4095
 # https://github.com/pallets/flask/issues/4295
 # https://github.com/pallets/flask/issues/4297
-ErrorHandlerCallable = t.Callable[[t.Any], ResponseReturnValue]
+ErrorHandlerCallable = t.Union[
+    t.Callable[[t.Any], ResponseReturnValue],
+    t.Callable[[t.Any], t.Awaitable[ResponseReturnValue]],
+]
 
 RouteCallable = t.Union[
     t.Callable[..., ResponseReturnValue],