T3001-2 fails on i386 Linux

The T3001-2 testcase fails on i386/Linux:

Wrong exit code for T3001-2(prof_hb)(expected 0 , actual 134 )
Stderr ( T3001-2 ):
T3001-2: internal error: Invalid object in processHeapClosureForDead(): 7
    (GHC version 8.5.20180419 for i386_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Aborted
*** unexpected failure for T3001-2(prof_hb)

Closure type 7 is CONSTR_NOCAF, which is indeed invalid. Tracking this down will take some debugging.

Trac metadata

Trac field	Value
Version	8.2.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Profiling
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture