* Bug in clearSubstitutes().
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@ -282,7 +282,8 @@ static PathSet getReferers(const Transaction & txn, const Path & storePath)
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void setReferences(const Transaction & txn, const Path & storePath,
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const PathSet & references)
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{
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if (!isRealisablePath(txn, storePath))
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/* For unrealisable paths, we can only clear the references. */
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if (references.size() > 0 && !isRealisablePath(txn, storePath))
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throw Error(
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format("cannot set references for path `%1%' which is invalid and has no substitutes")
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% storePath);
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