get_l1_object: only set L0 and L1 if they are non-empty #4923
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This is important because an expression "L0: '', L1: ''" is semantically equivalent to one with either index not specified at all, but they do not compare equal (irept::compare distinguishes an empty-string from an absent key), leading to confusing behaviour when ssa_exprts are used as keys in a map, for example.
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allredj
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Passed Diffblue compatibility checks (cbmc commit: 56bb4c4).
Build URL: https://travis-ci.com/diffblue/test-gen/builds/120260619
peterschrammel
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allredj
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Jul 24, 2019
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This is important because an expression "L0: '', L1: ''" is semantically equivalent to
one with either index not specified at all, but they do not compare equal (irept::compare
distinguishes an empty-string from an absent key), leading to confusing behaviour when
ssa_exprts are used as keys in a map, for example.