Add test for NLP without objective #653
Description
Test the edge-case revealed by jump-dev/Ipopt.jl#159.
This will probably be implemented in MINLPTests.jl, but leaving as an issue here so we don't forget.
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Test the edge-case revealed by jump-dev/Ipopt.jl#159.
This will probably be implemented in MINLPTests.jl, but leaving as an issue here so we don't forget.