[GHC] #15638: Make Ptr argument to hGetBuf and hGetBufSome strict

[GHC]

#15638: Make Ptr argument to hGetBuf and hGetBufSome strict
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        Reporter:  andrewthad        |                Owner:  (none)
            Type:  task              |               Status:  patch
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Krzysztof Gogolewski <krz.gogolewski@…>):

 In [changeset:"88130dbe948eaa7f76cf237d8aba17b41fac4904/ghc"
 88130dbe/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="88130dbe948eaa7f76cf237d8aba17b41fac4904"
 base: Add bangs to GHC.IO.Handle.Text hGet* functions

 Summary:
 I believe that demand analysis doesn't notice that these are morally
 strict in
 the pointer argument due to the `count == 0` special case. Fixes #15638.

 Test Plan: Validate

 Reviewers: andrewthad, hvr

 Reviewed By: andrewthad

 Subscribers: rwbarton, carter

 GHC Trac Issues: #15638

 Differential Revision: https://phabricator.haskell.org/D5149
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15638#comment:2>
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