Safety: added assert.
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@ -19,6 +19,7 @@
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#include <stdlib.h>
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#include <stdio.h>
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#include <assert.h>
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#include "term.h"
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#include "termlist.h"
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#include "mgu.h"
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@ -140,6 +141,7 @@ unify_callback_wrapper (Termlist tl, struct state_mgu_tmp *ptr_tmpstate)
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{
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// now the keys are unified (subst in this tl)
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// and we try the inner terms
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assert (ptr_tmpstate != NULL);
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return unify (ptr_tmpstate->unifyt1, ptr_tmpstate->unifyt2, tl,
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ptr_tmpstate->oldcallback, ptr_tmpstate->oldstate);
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}
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