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This patch makes the Data.Typeable.Typeable class work with arguments of any
kind. In particular, this removes the Typeable1..7 class hierarchy, greatly
simplyfing the whole Typeable story. Also added is the AutoDeriveTypeable
language extension, which will automatically derive Typeable for all types and
classes declared in that module. Since there is now no good reason to give
handwritten instances of the Typeable class, those are ignored (for backwards
compatibility), and a warning is emitted.

The old, kind-* Typeable class is now called OldTypeable, and lives in the
Data.OldTypeable module. It is deprecated, and should be removed in some future
version of GHC.

The new I/O manager has a separate thread for tracking timeouts.

It was a failing test for a defunct feature (NPlusKPatterns) (#851)

It was added in fbb1f167657bcdb4d9a67e9b97734faeb82c8a25 without
an accompanying source file. Also, it was marked as being broken by
5673, so I'm not even sure which ticket it was supposed to be a
test for.

The name 'os' clashes with a python library

Gives a list of tickets that the testsuite thinks are broken, and
what bug it thinks is the reason. This can then be pasted into trac
and 'previewed', which will show any closed tickets with strikeout.