Constrained fromTryCatch

You shouldn't be able to do this.

For example, if you want to parse a string into an Int, note:

1. This is currently more general than your problem, and broken (i.e. a stack overflow means the string wasn't in the format of an Int).
2. If you constrained this to nonfatal, it is still more general than your problem. You will still be catching things you shouldn't.
3. This does not compose.
4. Parsing an int shouldn't be an exception in the first place.
5. There are performance predictability issues with using this.