fix self-deadlock in empty IDB entries.
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@ -3449,6 +3449,13 @@ lu_recorded(PredEntry *pe) {
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YENV[E_CB] = (CELL) B;
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}
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P = pe->CodeOfPred;
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#if defined(YAPOR) || defined(THREADS)
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/* avoid holding a lock if we don't have anything in the database */
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if (P == FAILCODE) {
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UNLOCK(pe->PELock);
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PP = NULL;
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}
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#endif
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}
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if (pe->PredFlags & ProfiledPredFlag) {
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LOCK(pe->StatisticsForPred.lock);
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