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fix #3812

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-06 19:57:07 -07:00
parent b954e0d64b
commit cb136418d5
1 changed files with 2 additions and 0 deletions
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2
src/ast/proofs/proof_utils.cpp
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@ -463,6 +463,8 @@ public:
reduce_hypotheses0(ast_manager& m): m(m), m_refs(m) {} reduce_hypotheses0(ast_manager& m): m(m), m_refs(m) {}
void operator()(proof_ref& pr) { void operator()(proof_ref& pr) {
if (!pr)
throw default_exception("proof reduction requires well defined proofs");
proof_ref tmp(m); proof_ref tmp(m);
tmp = pr; tmp = pr;
elim(pr); elim(pr);