"internal error: heapCencus, unknown object: 0" with retainer profiling
Compile the attached file as:
ghc --make retainer.hs -prof -rtsopts
And run it with:
./retainer +RTS -hr -V0
retainer: internal error: heapCensus, unknown object: 0 (GHC version 7.0.4 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
I found this test case while chasing a "Invalid object in isRetainer(): 39" problem, so this might be related to the ticket #4820 (closed). Also, although this particular case requires -V0 to reproduce, the original problem happened without -V0 as well.