Number: 177
Title: Missing error message
Submitter: Emden R. Gansner
Date: Thu Jul 25 09:12:08 2002
Subsys: Dot
Version: 1.8.8
System: *-*-*
Severity: minor
Problem:
The input graph has illegal constraints: node a is in two constraining subgraphs. However, dot does not complain despite the fact that node a is not put into cluster3 in the output.

If the subgraphs are reversed, dot gives the expected complaint.
Input: 

digraph G {
  subgraph H2 {
    rank=same;
    a;
    c;
  }
  subgraph cluster3 {
    a -> d;
  }
}
Owner: *
Status: *