Fix inject_all to cleanup after exceptions

lib/rollbot/injection/base.py

@@ -1,6 +1,5 @@
 from typing import Generic, TypeVar, Any
 from contextlib import asynccontextmanager
-import asyncio
 
 from ..types import Message, Context
 
@@ -19,9 +18,10 @@ class InjectorWithCleanup(Injector[Dep]):
 
 @asynccontextmanager
 async def inject_all(injectors: list[Injector[Any]], message: Message, context: Context):
-    # TODO want to catch exceptions for the inject calls too to ensure cleanup
-    deps = await asyncio.gather(*[inj.inject(message, context) for inj in injectors])
     try:
+        deps = []
+        for inj in injectors:
+            deps.append(await inj.inject(message, context))
         yield deps
     finally:
         for dep, inj in zip(deps, injectors):