[GHC] #8840: standalone 'let' in do notation does not parse

[GHC]

#8840: standalone 'let' in do notation does not parse
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        Reporter:  slyfox            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by hvr):

 This is because `let` is a block-opening syntax element just like `do`;
 c.f.
 [http://www.haskell.org/onlinereport/haskell2010/haskellch2.html#x7-210002.7
 Haskell Report 2010: Lexical Structure]

 If you write instead

 {{{#!hs
 do { let { z = 1 }; print z }
 }}}

 it should work...

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8840#comment:1>
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