[cmucl-ticket] [cmucl] #72: SIGFPE with no exceptions currently enabled?

[cmucl]

#72: SIGFPE with no exceptions currently enabled?
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 Reporter:  rtoy    |       Owner:  somebody
     Type:  defect  |      Status:  new     
 Priority:  major   |   Milestone:          
Component:  Core    |     Version:  2013-01 
 Keywords:          |  
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 While I've seen this SIGFPE issue before, I never tracked it down.  Here
 is a repeatable case (from Carl):
 {{{
     (defun test (x y)
       (declare (optimize (speed 3) (safety 0))
                (type (signed-byte 32) x y))
       (the (signed-byte 32) (truncate x y)))
 }}}
 Although the code lies to the compiler (the asserted return type of
 {{{truncate}}} is incorrect), the point is that {{{(test #x-80000000
 -1)}}} causes the SIGFPE exception.

 I believe {{{sigfpe-handler}}} was only expecting to handle FP exceptions.
 In this example, the division causes an overflow which generates the
 SIGFPE.

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Ticket URL: <http://trac.common-lisp.net/cmucl/ticket/72>
cmucl <http://common-lisp.net/project/cmucl>
Cmucl is a high-performance, free Common Lisp implementation.