NULL dereference in psxcancel

[Joel Sherrill]

Hi

mips/jmr3904 faults on this but I confirmed psim has the
same failure.  watchpoints do not seem to be working on
either

countTaskAsync: elapsed time (second):  1
countTaskAsync: elapsed time (second):  2
countTaskAsync: elapsed time (second):  3
countTaskAsync: elapsed time (second):  4
mips-core: 4 byte read to unmapped address 0x34 at 0x88010cb0

Program received signal SIGBUS, Bus error.
_Thread_queue_Extract (the_thread_queue=0x0, the_thread=0x88020068)
    at
../../../../../../rtems/c/src/../../cpukit/score/src/threadqextract.c:33
33	  if  ( the_thread_queue->discipline ==
THREAD_QUEUE_DISCIPLINE_PRIORITY )
(gdb) q

I think there is a bug in the asynchronous cancellation.

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill at OARcorp.com        On-Line Applications Research
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