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From: cwc@blitz.princeton.edu (Chris Clifton)
Newsgroups: comp.lang.eiffel
Subject: Catching signals
Summary: rescue clause ignored in package
Message-ID: <935@rossignol.Princeton.EDU>
Date: 10 Jul 90 16:38:01 GMT
Sender: news@cs.Princeton.EDU
Organization: Princeton University, NJ
Lines: 30

I am trying to deal with an external signal in a rescue clause.
Basically the code is as follows:

rescue
  if exception = Sighup then
    ignore(Sighup); -- One is enough.
    signalled := true;
    retry
   end

This works fine when compiled with es -d, even with no assertion checking.
However, when I generate a package the rescue clause is ignored:  the program
terminates with the following message:

  Following information could be incomplete or untrustworthy.

  System execution failed.
  Below is the sequence of recorded exceptions:
  ----------------------------------------------------------------------------
  Object Class        Routine            Nature of exception            Effect
  ----------------------------------------------------------------------------
                                         External event:
                                         Hangup.                        Fail
  ----------------------------------------------------------------------------
  For more information on the last exception,
  recompile with option PRECONDITIONS or ALL_ASSERTIONS on.

Anyone have any suggestions on what this might be and how to fix it?

-Chris Clifton (cwc@Princeton.EDU)