Davide Galassi 6b9904c1bf Fix node lookup on fork-tree after a warp-sync (#11476) ...

* Fix node lookup on fork-tree after a warp-sync

After a warp-sync, the error condition was triggered by the absence
of the parent node of the first imported block.

The previous lookup implementation was traversing the tree using a
recursive **post-order** DFS, this technique doesn't trigger the issue.

In the last iterative implementation we were using a BFS instead.

* Added internal doc warning

* Small optimization

* Specify post-order DFS in the comment

2022-05-25 07:40:37 +00:00

substrate

Fix node lookup on fork-tree after a warp-sync (#11476)

2022-05-25 07:40:37 +00:00

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