[GHC] #11153: building lens-4.12.3 impossible happened: dupe _hs_primitive_memcpy

[GHC]

#11153: building lens-4.12.3 impossible happened: dupe _hs_primitive_memcpy
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        Reporter:  blippy             |                Owner:
            Type:  bug                |               Status:  infoneeded
        Priority:  normal             |            Milestone:
       Component:  libraries (other)  |              Version:  7.10.2
      Resolution:                     |             Keywords:
Operating System:  Windows            |         Architecture:  x86
 Type of failure:  None/Unknown       |            Test Case:
      Blocked By:                     |             Blocking:
 Related Tickets:                     |  Differential Rev(s):
       Wiki Page:                     |
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Changes (by thomie):

 * status:  new => infoneeded


Comment:

 Thanks for the report. Which version of `lens` did you have installed
 before?

 Are you able to reproduce this bug?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11153#comment:1>
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