Double edges with [minlen=0] across clusters

digraph G {
ordering=out;
subgraph cluster_1{
A;B;C;
}
subgraph cluster_2{
D;
}
A->B ;
A->C ;
C->D [minlen=0];
}

There are two edges from C to D. This behavior is inconsistent. The above graph is the smallest subset which retains this behavior. If minlen is removed, layout loses its proper structure.

No, it is a bug. Please file

No, it is a bug. Please file a bug report at http://www.graphviz.org/content/graphviz-issue-tracker. Thanks.

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