WxGUI d.vect/rast modules stuck in running state with d.mon

[marisn]

Start monitor (d.mon x0); Launch d.rast module (with new wx based UI). Choose raster to display. Press "RUN". No output in "command output" tab and module doesn't stop running (only "STOP" button is active). Still module has done it's job - there is content in monitor. Only way how to close this window is by window close button, as "STOP" button emits only errors:

GRASS 6.4.0svn (personal_spearfish_60):~/soft/grass_64 > d.mon x0
using default visual which is TrueColor
ncolors: 16777216
Graphics driver [x0] started
GRASS 6.4.0svn (personal_spearfish_60):~/soft/grass_64 > d.vect
Traceback (most recent call last):
  File "/home/maris/soft/grass_64/dist.x86_64-unknown-linux-gnu/etc/wxpython/gui_modules/goutput.py", line 486, in OnCmdAbort
    self.cmdThread.abort()
  File "/home/maris/soft/grass_64/dist.x86_64-unknown-linux-gnu/etc/wxpython/gui_modules/goutput.py", line 108, in abort
    self.requestCmd.abort()
AttributeError: 'CmdThread' object has no attribute 'requestCmd'

[hamish]

dupe of #928, but interesting a builtin C module from the command libe triggers it. (I can reproduce)