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-rw-r--r--synapse/util/caches/deferred_cache.py4
-rw-r--r--synapse/util/caches/descriptors.py2
2 files changed, 3 insertions, 3 deletions
diff --git a/synapse/util/caches/deferred_cache.py b/synapse/util/caches/deferred_cache.py
index 6425f851ea..bcb1cba362 100644
--- a/synapse/util/caches/deferred_cache.py
+++ b/synapse/util/caches/deferred_cache.py
@@ -395,8 +395,8 @@ class DeferredCache(Generic[KT, VT]):
             # _pending_deferred_cache.pop should either return a CacheEntry, or, in the
             # case of a TreeCache, a dict of keys to cache entries. Either way calling
             # iterate_tree_cache_entry on it will do the right thing.
-            for entry in iterate_tree_cache_entry(entry):
-                for cb in entry.get_invalidation_callbacks(key):
+            for iter_entry in iterate_tree_cache_entry(entry):
+                for cb in iter_entry.get_invalidation_callbacks(key):
                     cb()
 
     def invalidate_all(self) -> None:
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py
index 0391966462..b3c748ef44 100644
--- a/synapse/util/caches/descriptors.py
+++ b/synapse/util/caches/descriptors.py
@@ -432,7 +432,7 @@ class DeferredCacheListDescriptor(_CacheDescriptorBase):
         num_args = cached_method.num_args
 
         if num_args != self.num_args:
-            raise Exception(
+            raise TypeError(
                 "Number of args (%s) does not match underlying cache_method_name=%s (%s)."
                 % (self.num_args, self.cached_method_name, num_args)
             )