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<table><tr><th>Extension Name</th>
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<th>GHC</th>
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<th>NHC</th>
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<th>HUGS
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<th>HUGS</th>
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<th>JHC
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</th></tr>
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<tr><th>[OverlappingInstances](overlapping-instances)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[RecursiveDo](recursive-do)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[ParallelListComp](parallel-list-comp)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[MultiParamTypeClasses](multi-param-type-classes)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[NoMonomorphismRestriction](no-monomorphism-restriction)</th>
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<th> True </th>
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<th> True </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[FunctionalDependencies](functional-dependencies)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[RankNTypes](rank-n-types)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[PolymorphicComponents](polymorphic-components)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[ExistentialQuantification](existential-quantification)</th>
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<th> True </th>
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<th> True </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[ScopedTypeVariables](scoped-type-variables)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[ImplicitParams](implicit-params)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[FlexibleContexts](flexible-contexts)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[FlexibleInstances](flexible-instances)</th>
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<th> True </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[EmptyDataDecls](empty-data-decls)</th>
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<th> True </th>
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<th> True </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>CPP?</th>
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<th> True </th>
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<th> True </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[TypeSynonymInstances](type-synonym-instances)</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>TemplateHaskell?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[ForeignFunctionInterface](foreign-function-interface)</th>
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<th> True </th>
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<th> True </th>
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<th> True
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</th></tr>
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<tr><th>AllowOverlappingInstances?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>AllowUndecidableInstances?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>AllowIncoherentInstances?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>InlinePhase?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>ContextStack?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>[Arrows](arrows)</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>Generics?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>NoImplicitPrelude?</th>
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<th> True </th>
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<th> False </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>NamedFieldPuns?</th>
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<th> False </th>
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<th> True </th>
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<th> False
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>ExtensibleRecords?</th>
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<th> False </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>RestrictedTypeSynonyms?</th>
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<th> False </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>HereDocuments?</th>
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<th> False </th>
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<th> False </th>
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<th> True
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</th></tr>
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</th>
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<th></th></tr>
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<tr><th>UnsafeOverlappingInstances?</th>
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<th> False </th>
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<th> False </th>
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<th> True
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</th></tr></table>
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</th>
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<th></th></tr></table>
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## Extensions supported by two compilers
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... | ... | |