PatternMatchFail — errors.fyi

haskell · haskell/PatternMatchFail

PatternMatchFail

Thrown when a partial function is called with a value it does not match. Common sources are non-exhaustive case expressions, partial lambda patterns, and do-notation pattern bindings where the matched constructor is not the one actually present.

References

hackage.haskell.org/package/base/docs/Control-Exception.html

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