Dear Maintainer,


   * What led up to the situation?
 I've update Debian.
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
Type gnome-calculator   in gnome-terminal.
   * What was the outcome of this action?
"core"
   * What outcome did you expect instead?
        Start graphical user interface.
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Sorry I can't attach core file, it's 256 MiB.