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Ensure we don't mutate state cache entries

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This commit is contained in:
Erik Johnston 2016-09-14 10:03:48 +01:00
parent 1b01488d27
commit d5ae1f1291
3 changed files with 33 additions and 22 deletions
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6
synapse/state.py
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@ -26,6 +26,7 @@ from synapse.events.snapshot import EventContext
from synapse.util.async import Linearizer
from collections import namedtuple
from frozendict import frozendict
import logging
import hashlib
@ -58,11 +59,11 @@ class _StateCacheEntry(object):
__slots__ = ["state", "state_group", "state_id", "prev_group", "delta_ids"]
def __init__(self, state, state_group, prev_group=None, delta_ids=None):
self.state = state
self.state = frozendict(state)
self.state_group = state_group
self.prev_group = prev_group
self.delta_ids = delta_ids
self.delta_ids = frozendict(delta_ids) if delta_ids is not None else None
# The `state_id` is a unique ID we generate that can be used as ID for
# this collection of state. Usually this would be the same as the
@ -255,6 +256,7 @@ class StateHandler(object):
context.prev_group = entry.prev_group
context.delta_ids = entry.delta_ids
if context.delta_ids is not None:
context.delta_ids = dict(context.delta_ids)
context.delta_ids[key] = event.event_id
else:
context.current_state_ids = context.prev_state_ids