Number: 1666
Title: Assertion `(g)->u.rank[r].n <= (g)->u.rank[r].an' failed.
Submitter: Johannes Tietje
Date: Wed Jun 17 10:33:10 2009
Subsys: Dot
Version: 2.18-1ubuntu2
System: x86-Linux-Ubuntu 9.04
Severity: major
By drawing a certain graph, i receive the

"dot: mincross.c:846: install_in_rank: Assertion `(g)->u.rank[r].n <= (g)->u.rank[r].an' failed."

error, whilst laying out the same graph without subgraphs (some nodes are expanded into subgraphs) causes no problems. I attached the text file for debugging reasons.
Input file:
Owner: *
Status: *