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chore(frontends/lean/elaborator): add assertion for sanity checking

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Leonardo de Moura 2015-05-25 14:04:27 -07:00
parent 7e875c8d85
commit 24b35eefe6
1 changed files with 1 additions and 0 deletions
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src/frontends/lean/elaborator.cpp
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@ -1846,6 +1846,7 @@ bool elaborator::try_using_begin_end(substitution & subst, expr const & mvar, pr
return false;
} else {
subst = ps.get_subst();
lean_assert(subst.is_assigned(mvar));
expr v = subst.instantiate(mvar);
subst.assign(mlocal_name(mvar), v);
return true;