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Fix event chain bg update. (#9118)

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We passed in a graph to `sorted_topologically` which didn't have an
entry for each node (as we dropped nodes with no edges).
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Erik Johnston 2021-01-14 18:57:32 +00:00 • committed by GitHub
parent d2479c6870
commit 1a08e0cdab
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3 changed files with 10 additions and 1 deletions
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synapse/util/iterutils.py
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@ -92,7 +92,7 @@ def sorted_topologically(
node = heapq.heappop(zero_degree)
yield node
for edge in reverse_graph[node]:
for edge in reverse_graph.get(node, []):
if edge in degree_map:
degree_map[edge] -= 1
if degree_map[edge] == 0: