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GHCi ':set' completion does not list all options

In particular, the new -X options are missing:

stefan@stefans:/tmp$ ghci
GHCi, version 6.7.20070829: http://www.haskell.org/ghc/  :? for help
Loading package base ... linking ... done.
Prelude> :set -XTyp(TAB TAB, with no effect)
unrecognised flags: -XTyp
Prelude> :set -XTypeFamilies
Prelude> Leaving GHCi.
Trac metadata
Trac field Value
Version 6.7
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component GHCi
Test case
Differential revisions
BlockedBy
Related
Blocking
CC sorear
Operating system
Architecture
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