| 4382 |      1 | 
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|  |      2 | Isabelle BUGS -- history of reported faults
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|  |      3 | ===========================================
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|  |      4 | 
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|  |      5 | 1.  Symptom: hyp_subst_tac does nothing if the selected equality involves type
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|  |      6 |     unknowns.  Cause: it uses the simplifier, which ignores such equalities.
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|  |      7 |     Fix: check for type unknowns in hypsubst/inspect_pair;  change interface
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|  |      8 |     function dest_eq to return the type of the equality. (lcp, 5/11/97)
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|  |      9 | 
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|  |     10 | 2.  Symptom: read_instantiate_sg has problems instantiating types in some
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|  |     11 |     simultaneous instantiations (Message-id: <199710301432.PAA20594@sirius.Informatik.Uni-Bremen.DE> on isabelle-users)
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| 10941 |     12 | 
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