assertion failed! find: ftsfind.c:470: consider_visiting: ...

[Jim Meyering]

Hello, I've just hit this assertion:

    find: ftsfind.c:470: consider_visiting: Assertion `ent->fts_info == 11 || 
state.type != 0' failed.

I suspect that one process was traversing a hierarchy with find while
another was deleting it via rm -rf.  Neither command was run directly,
so it may be hard to reproduce.

This is find-4.5.8-git, bootstrapped from latest upstream sources as of
Apr 5 12:02 UTC, on Fedor 13 alpha.

I'll try to come up with a reproducer tomorrow.