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nb_getval of unbound stuff can succeed, just ask CHR.

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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1964 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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vsc 2007-10-18 09:13:50 +00:00
parent 929d7acb2d
commit 268ad4ab73
1 changed files with 3 additions and 2 deletions
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5
C/globals.c
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@ -1212,8 +1212,9 @@ p_nb_getval(void)
READ_LOCK(ge->GRWLock);
to = ge->global;
if (IsVarTerm(to) && IsUnboundVar(VarOfTerm(to))) {
READ_UNLOCK(ge->GRWLock);
return FALSE;
Term t = MkVarTerm();
Bind(VarOfTerm(to), t);
to = t;
}
READ_UNLOCK(ge->GRWLock);
return Yap_unify(ARG2, to);