When rewriting guarded clauses, use proper env in pat_to_exp #992
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Before, the env didn't have the pattern variables and the cases that type check the resulting expression immediately will fail. Normally this doesn't happen, but this is a prerequisite for keeping vector concatenation patterns in the Lean backend.
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Before, the env didn't have the pattern variables and the cases that type check the resulting expression immediately will fail. Normally this doesn't happen, but this is a prerequisite for keeping vector concatenation patterns in the Lean backend.