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fix #3906 by fixing a regression from today
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@ -496,13 +496,17 @@ namespace {
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SASSERT(m_todo.empty());
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if (m_visited.is_marked(e) || !is_app(e)) return;
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// -- keep track of all created expressions to
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// -- make sure that expression ids are stable
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expr_ref_vector pinned(m);
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m_todo.reset();
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m_todo.push_back(e);
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while(!m_todo.empty()) {
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e = m_todo.back();
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pinned.push_back(m_todo.back());
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m_todo.pop_back();
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if (!is_app(e)) continue;
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app* a = to_app(e);
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if (!is_app(pinned.back())) continue;
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app* a = to_app(pinned.back());
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process_app(a, out);
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m_visited.mark(a, true);
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}
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