In Newton.c , lines 375-376:

  if (*normres <= tol)
    return 0;

returns from the function after temporary for the Newton() function has been allocated, but does not free the memory. valgrind confirms this issue.

I attach an updated version of Newton.c that should fix the issue.

attachment:

Newton.c

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2596/einsteininitialdata-twopunctures-allocated