Jonathan Stockley <[EMAIL PROTECTED]> writes:
| I think there is a bug in GNU tsort (at least that supplied in RedHat
| GNU/Linux 6.1 and 6.2).
| When it detects a cycle in the data it says in the info page:
| ' `tsort' will detect cycles in the input and writes the first cycle
| encountered to standard error.'
|
| The BSD version in RedHat GNU/Linux 6.0 says this:
| ' If the graph contains a cycle (and therefore cannot be properly
| sorted),
| one of the arcs in the cycle is ignored and the sort continues.
| Cycles
| are reported on standard error.'
|
| This is also the behaviour on solaris, HPUX and AIX.
| The effect of this is that given the input
| a b
| b a
|
| the GNU tsort reports the cycle to stderr and the is no output on stdout
|
| but BSD tsort reports the cycle to stderr and ignores one of the arcs so
| on stdout we get:
| b
| a
...
Thanks for the report.
That's fixed in the latest test release.
ftp://alpha.gnu.org/gnu/fetish/
