internal error: scavenge_one: strange object 19828

I'll attach the test program. Reproduces each time.

$ ./test 
Nothing
test: internal error: scavenge_one: strange object 19828
Stack trace:                  0x4b27df    set_initial_registers (rts/Libdw.c:288.0)
            0x7fe51b3fcd48    dwfl_thread_getframes (/usr/lib/x86_64-linux-gnu/libdw-0.170.so)
            0x7fe51b3fd22c    dwfl_getthread_frames (/usr/lib/x86_64-linux-gnu/libdw-0.170.so)
                  0x4b2ddd    libdwGetBacktrace (rts/Libdw.c:259.0)
                  0x49883b    rtsFatalInternalErrorFn (rts/RtsMessages.c:169.0)
                  0x4989ed    barf (rts/RtsMessages.c:47.0)
                  0x4b3f8c    scavenge_one (rts/sm/Scav.c:1615.0)
                  0x4b4e91    scavenge_loop1 (rts/sm/Scav.c:2066.0)
                  0x49d517    scavenge_until_all_done (rts/sm/GC.c:1017.0)
                  0x49dde4    GarbageCollect (rts/sm/GC.c:412.0)
                  0x4969a3    scheduleDoGC (rts/Schedule.c:1827.0)
                  0x49776c    schedule (rts/Schedule.c:558.0)
                  0x49811c    scheduleWorker (rts/Schedule.c:2582.0)
            0x7fe51b835494    start_thread (/build/glibc-tnXPha/glibc-2.24/nptl/pthread_create.c:333.0)
            0x7fe51b113abf    __clone (../sysdeps/unix/sysv/linux/x86_64/clone.S:99.0)

    (GHC version 8.2.1 for x86_64_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Aborted

Trac metadata

Trac field	Value
Version	8.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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