X11 troubles (PR#400)

[p.dalgaard@biostat.ku.dk]

Just to get these issues recorded in the bug repository:

a) We don't handle multiple window closes well

My "favourite" version of this is when I ^Z out of an R session with
an open graphics window to do something on the command line, then kill
the graphics window (which does nothing), kill it again, realise that
it's because the R session was stopped, and:

[pd@blueberry BUILD]$ %
bin/R
Segmentation fault (core dumped)

b) X11 errors should be caught by an error handler, not kill R.

This is mainly seen when there's an error somewhere else, such as
trouble with the font setup. But in principle, we should at worst shut
down the graphics window, not R itself.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907

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