[GHC] #11155: Trivial thunk gives "undefined reference to stg_ap_0_upd_info"

[GHC]

#11155: Trivial thunk gives "undefined reference to stg_ap_0_upd_info"
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        Reporter:  simonpj           |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.2
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  simplCore/should_compile/T11155
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"f091218ae14a24f9dbd991794c2da6377364578b/ghc" f091218/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="f091218ae14a24f9dbd991794c2da6377364578b"
 CLabel: Catch #11155 during C-- pretty-printing

 In #11555 we ended up generating references to the non-existence
 stg_ap_0_upd. Here we add asserts to verify that we don't generate
 references to non-existent selector or application symbols.

 It would likely also make sense to add further asserts during code
 generation, so we can catch the issue even closer to its source.

 Test Plan: Validate

 Reviewers: simonmar, austin, ezyang

 Reviewed By: simonmar, austin

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2230

 GHC Trac Issues: #11155
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11155#comment:16>
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