[GHC] #15285: "strange closure type" in T7919 with the threaded2 way

[GHC]

#15285: "strange closure type" in T7919 with the threaded2 way
----------------------------------------+----------------------------------
           Reporter:  alpmestan         |             Owner:  (none)
               Type:  bug               |            Status:  new
           Priority:  normal            |         Milestone:
          Component:  Runtime System    |           Version:  8.5
           Keywords:                    |  Operating System:  Linux
       Architecture:  Unknown/Multiple  |   Type of failure:  Runtime crash
          Test Case:  T7919             |        Blocked By:
           Blocking:                    |   Related Tickets:
Differential Rev(s):                    |         Wiki Page:
----------------------------------------+----------------------------------
 Last night's `./validate --slow` run on Circle CI revealed the following
 failure:

 {{{
 Wrong exit code for T7919(threaded2)(expected 0 , actual 134 )
 Stderr ( T7919 ):
 T7919: internal error: evacuate: strange closure type 32554624
     (GHC version 8.5.20180617 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 Aborted
 *** unexpected failure for T7919(threaded2)
 }}}

 The full log is available
 [https://circleci.com/api/v1.1/project/github/ghc/ghc/6205/output/107/0?file=true
 here]. Among other things, you can see that it indeed only fails in the
 threaded2 way.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15285>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler