[GHC] #2027: ghc -e sometimes spills control characters into its output

[GHC]

#2027: ghc -e  sometimes spills control characters into its output
----------------------------+-----------------------------------------------
    Reporter:  int-e        |       Owner:       
        Type:  bug          |      Status:  new  
    Priority:  normal       |   Milestone:       
   Component:  GHCi         |     Version:  6.8.2
    Severity:  minor        |    Keywords:       
  Difficulty:  Easy (1 hr)  |    Testcase:       
Architecture:  Unknown      |          Os:  Linux
----------------------------+-----------------------------------------------
 The behaviour depends on the TERM variable. For example,

 {{{
 # TERM=xterm ghc -e 'return ()' | od -a
 0000000 esc   [   ?   1   0   3   4   h
 0000010
 }}}

 Workaround: unset the TERM variable.

 Analysis: Those control characters are emitted by libreadline on
 initialisation. They enable the terminal's meta mode.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2027>
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