-fth is deprecated without warning

The flag -fth was deprecated in GHC 6.10 http://www.haskell.org/ghc/docs/6.10.1/html/users_guide/release-6-10-1.html. Unlike other deprecated flags, -fth does not give a warning when used.

$ ghci -fbang-patterns

on the commandline: Warning:
    -fbang-patterns is deprecated: use -XBangPatterns or pragma {-# LANGUAGE BangPatterns #-} instead

$ ghci -fth
<no warning>

Trac metadata

Trac field	Value
Version	7.6.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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