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-rw-r--r--synapse/storage/engines/sqlite.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/synapse/storage/engines/sqlite.py b/synapse/storage/engines/sqlite.py
index 5db0f0b520..b3d1834efb 100644
--- a/synapse/storage/engines/sqlite.py
+++ b/synapse/storage/engines/sqlite.py
@@ -12,6 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+import platform
 import struct
 import threading
 import typing
@@ -30,6 +31,11 @@ class Sqlite3Engine(BaseDatabaseEngine["sqlite3.Connection"]):
         database = database_config.get("args", {}).get("database")
         self._is_in_memory = database in (None, ":memory:",)
 
+        if platform.python_implementation() == "PyPy":
+            # pypy's sqlite3 module doesn't handle bytearrays, convert them
+            # back to bytes.
+            database_module.register_adapter(bytearray, lambda array: bytes(array))
+
         # The current max state_group, or None if we haven't looked
         # in the DB yet.
         self._current_state_group_id = None