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Segfault on malformed archive GetName #27

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@cym13

The following file causes a crash in ZArchiveReader::GetName (base64 because of github limitations on files):

AAAAAAAAAAMAAAAAAAAAAAoAAQD2fx0YAQAAAAAAAAAAAAAAAAAAAAAYAAAAABgAEwAAAAAAAAAA AEgAAAAAAAAABAAAAAAAATIBUH////8AAAABAPEAAgAAAACAAAACAAAAA00AAAMAAAAAgAAAAAAA AAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAABkAAAAAAAAAIAAAAAAAAAAoAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAADAAAAAAAAAAfAAAAAAAAAAAAAAAAAAAAHwAAAAAAAAAAJXmym0WpS8i 7H6CR/gpsgRigvdsyAM4wD0xx2qkgNLcAAAAAAAAAQxhvzoBFp9S1g==

Apparently nameTable is never be initialized, so nameTable.size() causes a null pointer dereference.

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