[GHC] #3263: Warnings for monadic values not used

[GHC]

#3263: Warnings for monadic values not used
-----------------------------------+----------------------------------------
    Reporter:  NeilMitchell        |        Owner:  igloo           
        Type:  merge               |       Status:  reopened        
    Priority:  normal              |    Milestone:  6.12.1          
   Component:  Compiler            |      Version:  6.10.2          
    Severity:  normal              |   Resolution:                  
    Keywords:                      |   Difficulty:  Unknown         
    Testcase:  ghci/scripts/T3263  |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple    |  
-----------------------------------+----------------------------------------
Changes (by simonpj):

  * testcase:  => ghci/scripts/T3263
  * status:  closed => reopened
  * resolution:  fixed =>
  * type:  feature request => merge

Comment:

 Good point.  Fixed by:
 {{{
 Thu Oct 15 12:44:37 BST 2009  simonpj at microsoft.com
   * Fix Trac #3263: don't print Hpc tick stuff unless -dppr-debug is on

   In general, when pretty-printing HsSyn, we omit the extra info added by
 GHC
   (type appplications and abstractions, etc) when printing stuff for the
 user.
   But we weren't applying that guideline to the HsTick stuff for Hpc.
 This
   patch adds the necessary tests.


     M ./compiler/hsSyn/HsBinds.lhs -13 +23
     M ./compiler/hsSyn/HsExpr.lhs -8 +11
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3263#comment:13>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler