"internal error: PAP object entered!" when running ghci compiled with profiling

[igloo]

With this mk/build.mk:

GhcCompilerWays=p
GhcThreaded=NO
GhcProfiled=YES
#GhcDebugged=YES
GhcRTSWays += debug_p
WAY_debug_p_HC_OPTS += -O0 -optc-O0 -optc-g
MakefileDeps = NO

I get this:

$ compiler/stage2/ghc-inplace --interactive
GHCi, version 6.9.20080315: http://www.haskell.org/ghc/  :? for help
Loading package base ... linking ... done.
ghc-6.9.20080315: internal error: PAP object entered!
    (GHC version 6.9.20080315 for x86_64_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Unfortunately, there isn't a smaller example in the full testsuite.

[simonmar]

There's another ticket about this: #2197, and since that one has more commentary I'm closing this one.

[guest]

Simon: is this really the same one? 'PAP object entered' doesn't look like Sam's '/dist/build/HSghc-prim-0.1.o: unknown symbol `traceCcszh_fast error.

[simonmar]

Replying to guest:

Simon: is this really the same one? 'PAP object entered' doesn't look like Sam's '/dist/build/HSghc-prim-0.1.o: unknown symbol `traceCcszh_fast error.

SamB said in that ticket "Btw, the symbol mentioned in the error is from something I'm working on... but the non_p ghci loads fine."

Also, both tickets are about running a profiled GHC with --interactive, which is known to not work. I'd expect a crash on running the first bit of dynamically loaded or interpreted code (what we see here), but missing symbols on loading objects is to be expected too.