• Richard Eisenberg's avatar
    Fix #17405 by not checking imported equations · 55ca1085
    Richard Eisenberg authored
    Previously, we checked all imported type family equations
    for injectivity. This is very silly. Now, we check only
    for conflicts.
    
    Before I could even imagine doing the fix, I needed to untangle
    several functions that were (in my opinion) overly complicated.
    It's still not quite as perfect as I'd like, but it's good enough
    for now.
    
    Test case: typecheck/should_compile/T17405
    55ca1085
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