[GHC] #15502: -ddump-splices truncates Integer literals to Int literals

[GHC]

#15502: -ddump-splices truncates Integer literals to Int literals
-------------------------------------+-------------------------------------
        Reporter:  ChaiTRex          |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.6.1
       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):  Phab:D5089
       Wiki Page:                    |
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Comment (by Krzysztof Gogolewski <krz.gogolewski@…>):

 In [changeset:"7a3cda534d1447c813aa37cdd86e20b8d782cb02/ghc"
 7a3cda53/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="7a3cda534d1447c813aa37cdd86e20b8d782cb02"
 Fix #15502 by not casting to Int during TH conversion

 Summary:
 When turning an `IntegerL` to an `IntegralLit` during TH
 conversion, we were stupidly casting an `Integer` to an `Int` in
 order to determine how it should be pretty-printed. Unsurprisingly,
 this causes problems when the `Integer` doesn't lie within the bounds
 of an `Int`, as demonstrated in #15502.

 The fix is simple: don't cast to an `Int`.

 Test Plan: make test TEST=T15502

 Reviewers: bgamari, simonpj

 Reviewed By: simonpj

 Subscribers: simonpj, rwbarton, carter

 GHC Trac Issues: #15502

 Differential Revision: https://phabricator.haskell.org/D5089
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15502#comment:3>
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