on -current: pkg install graphviz: Unable to find pthread_mutexattr_setkind_np versioned symbol. Aborting.

[Anton Shterenlikht]

Has anybody seen this:

root at rat:~ # uname -a
FreeBSD rat 11.0-CURRENT FreeBSD 11.0-CURRENT #2 r286908: Wed Aug 19 00:30:59 BST 2015     root at rat:/usr/obj/usr/src/sys/GENERIC  amd64

root at rat:~ # pkg install graphviz
Updating FreeBSD repository catalogue...
FreeBSD repository is up-to-date.
All repositories are up-to-date.
Checking integrity... done (0 conflicting)
The following 1 package(s) will be affected (of 0 checked):

New packages to be INSTALLED:
        graphviz: 2.38.0_8

The process will require 65 MiB more space.

Proceed with this action? [y/N]: y
[1/1] Installing graphviz-2.38.0_8...
[1/1] Extracting graphviz-2.38.0_8: 100%
Unable to find pthread_mutexattr_setkind_np versioned symbol. Aborting.
Abort trap (core dumped)

The installed graphviz is unusable:

root at rat:~ # dot
There is no layout engine support for "dot"
Perhaps "dot -c" needs to be run (with installer's privileges) to register the plugins?
root at rat:~ # 

Anton