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-rw-r--r--synapse/util/__init__.py4
-rw-r--r--synapse/util/async_helpers.py2
-rw-r--r--synapse/util/caches/lrucache.py6
3 files changed, 5 insertions, 7 deletions
diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py
index 9ddd26ccaa..7ea0c4c36b 100644
--- a/synapse/util/__init__.py
+++ b/synapse/util/__init__.py
@@ -76,7 +76,7 @@ def unwrapFirstError(failure: Failure) -> Failure:
     # the subFailure's value, which will do a better job of preserving stacktraces.
     # (actually, you probably want to use yieldable_gather_results anyway)
     failure.trap(defer.FirstError)
-    return failure.value.subFailure  # type: ignore[union-attr]  # Issue in Twisted's annotations
+    return failure.value.subFailure
 
 
 P = ParamSpec("P")
@@ -178,7 +178,7 @@ def log_failure(
     """
 
     logger.error(
-        msg, exc_info=(failure.type, failure.value, failure.getTracebackObject())  # type: ignore[arg-type]
+        msg, exc_info=(failure.type, failure.value, failure.getTracebackObject())
     )
 
     if not consumeErrors:
diff --git a/synapse/util/async_helpers.py b/synapse/util/async_helpers.py
index 01e3cd46f6..4041e49e71 100644
--- a/synapse/util/async_helpers.py
+++ b/synapse/util/async_helpers.py
@@ -138,7 +138,7 @@ class ObservableDeferred(Generic[_T], AbstractObservableDeferred[_T]):
             for observer in observers:
                 # This is a little bit of magic to correctly propagate stack
                 # traces when we `await` on one of the observer deferreds.
-                f.value.__failure__ = f  # type: ignore[union-attr]
+                f.value.__failure__ = f
                 try:
                     observer.errback(f)
                 except Exception as e:
diff --git a/synapse/util/caches/lrucache.py b/synapse/util/caches/lrucache.py
index 452d5d04c1..ed0da17227 100644
--- a/synapse/util/caches/lrucache.py
+++ b/synapse/util/caches/lrucache.py
@@ -93,10 +93,8 @@ VT = TypeVar("VT")
 # a general type var, distinct from either KT or VT
 T = TypeVar("T")
 
-P = TypeVar("P")
 
-
-class _TimedListNode(ListNode[P]):
+class _TimedListNode(ListNode[T]):
     """A `ListNode` that tracks last access time."""
 
     __slots__ = ["last_access_ts_secs"]
@@ -821,7 +819,7 @@ class AsyncLruCache(Generic[KT, VT]):
     utilize external cache systems that require await behaviour to be created.
     """
 
-    def __init__(self, *args, **kwargs):  # type: ignore
+    def __init__(self, *args: Any, **kwargs: Any):
         self._lru_cache: LruCache[KT, VT] = LruCache(*args, **kwargs)
 
     async def get(