qt error trapping

[<pl...@pi...>]

Hi,

I just ran current cvs gnuplot while su as another user. This meant that 
gnuplot could not find the DISPLAY to connect to. However this failure 
was not correctly  ( at all ) trapped and I needed to ^C out to get back 
to the gnupplot prompt.

I would expect it to drop out instantly , preferably with an error message.


gnuplot> plot [-pi:pi] sin(x)
QXcbConnection: Could not connect to display
q

quit
^C
gnuplot>


Presumably there are other reasons qt may fail to open the plot window 
and this rather unusual situation probably highlights poor error 
trapping here.

Regards, Peter.