[ddbg] Unable to get value or type of global

[torhu]

I bump into this all the time when using ddbg.

Sample session:
---
->ld logfile
class tango.io.FileConduit.FileConduit common.logfile 
(common.logfile.tango.io.F
ileConduit.FileConduit) data offset: 0x11bcdc size: 0x0 segment: 0x3 
type: 0x0 (
)
class tango.io.FileConduit.FileConduit common.logfile 
(common.logfile.tango.io.F
ileConduit.FileConduit) data offset: 0x11bcdc size: 0x4 segment: 0x3 
type: 0x113
8 (PC5tango2io11FileConduit11FileConduit)
->t logfile
Unknown symbol logfile
->= logfile
Unknown symbol logfile
->t common.logfile
Unknown symbol common.logfile
->= common.logfile
Unknown symbol common.logfile
---

As you can see, logfile shows up in the symbol search, but still can't 
be accessed.  The program was built with -g, dmd 1.027.

And what is "common.logfile.tango.io.FileConduit.FileConduit"?