how to free pari's memory

[Ramón Casero Cañas <8-T@gmx.net>]

I initialize and use a PARI 2.1.4 stack in a function of a C++ program. I
thought that after returning from the function, the stack and pari data would
be freed. But I have noticed that if I press CTRL-C while the program is
running (after returning from the function), I get a

  ***   user interrupt.
  ***   Error in the PARI system. End of program.

Is there a way to delete the stack. I suposse this is not a garbage
collection.

Regards,

Ramón.

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