[Dot] Crash of dot, with this graph

[GadgetSteve]

Ported Issue from Mantis
Original ID: 1157
Reported By: Torsten Will

SEVERITY: MAJOR
Submitted: 2006-07-27 09:01:35

OS: --*

VERSION: DOT VERSION 2.6 (SUN AUG 28 13:14:52 UTC 2005)

DESCRIPTION

dot crashes, lefty only display a black canvas.
the crash seems to be in dot.exe itself, not in a windows dll.
the dot-file is auto-generated and quite complex, alas.

Here is a similar input which does not crash.

ADDITIONAL INFORMATION

[ellson] Also fails on latest CVS version on linux. Looks like a cluster problem.

(gdb) run ~/tmp.dot
Starting program: /home/ellson/FIX/Linux.x86_64/bin/dot ~/tmp.dot
dot: rank.c:237: cluster_leader: Assertion `((n)->u.UF_size <= 1) || (n == leader)' failed.

Program received signal SIGABRT, Aborted.
0x0000003d32a33145 in raise () from /lib64/libc.so.6
(gdb) where
#0 0x0000003d32a33145 in raise () from /lib64/libc.so.6
#1 0x0000003d32a34a90 in abort () from /lib64/libc.so.6
#2 0x0000003d32a2c936 in __assert_fail () from /lib64/libc.so.6
#3 0x00002aaaacfe90f3 in collapse_cluster (g=0x610c50, subg=0x6122c0)

at rank.c:237
#4 0x00002aaaacfe8b17 in dot_rank (g=0x610c50) at rank.c:284
#5 0x00002aaaacfe3001 in dot_layout (g=0x610c50) at dotinit.c:226
#6 0x00002aaaaaad0973 in gvLayoutJobs (gvc=, g=0x610c50)

at gvlayout.c:68
#7 0x0000000000400c5f in main (argc=,

argv=0x7fff004198b8) at dot.c:176
(gdb)