src/HOL/Library/Library.thy

Added an exception handler and error msg.

(*<*)
theory Library =
  Quotient +
  Nat_Infinity +
  Rational_Numbers +
  List_Prefix +
  Nested_Environment +
  Accessible_Part +
  Continuity +
  Multiset +
  Permutation +
  NatPair +
  Primes +
  While_Combinator:
end
(*>*)