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UndecidableInstances is actually not bad. I turn it on all the time and don't feel scared when I do. Worst-case, I write some bad instances and the compiler fai
by whateveracct 9y ago
UndecidableInstances is actually not bad. I turn it on all the time and don't feel scared when I do. Worst-case, I write some bad instances and the compiler fails due to the recursion limit. IncoherentInstances is the one that really has no place since it can make code unsound.