issue_comments: 561773837

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https://github.com/pydata/xarray/pull/3584#issuecomment-561773837 https://api.github.com/repos/pydata/xarray/issues/3584 561773837 MDEyOklzc3VlQ29tbWVudDU2MTc3MzgzNw== 1312546 2019-12-04T18:17:56Z 2019-12-04T18:17:56Z MEMBER

So this is enough to fix this in Dask

diff diff --git a/dask/blockwise.py b/dask/blockwise.py index 52a36c246..84e0ecc08 100644 --- a/dask/blockwise.py +++ b/dask/blockwise.py @@ -818,7 +818,7 @@ def fuse_roots(graph: HighLevelGraph, keys: list): if ( isinstance(layer, Blockwise) and len(deps) > 1 - and not any(dependencies[dep] for dep in deps) # no need to fuse if 0 or 1 + and not any(dependencies.get(dep, {}) for dep in deps) # no need to fuse if 0 or 1 and all(len(dependents[dep]) == 1 for dep in deps) ): new = toolz.merge(layer, *[layers[dep] for dep in deps])

I'm trying to understand why we're getting this KeyError though. I want to make sure that we have a valid HighLevelGraph before making that change.

 
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