More on the OS X crashes

[Simon Marlow]

Thanks Greg.  Wolfgang Thaller has promised to take a look at this, but 
I think he's quite busy at the moment.

Cheers,
	Simon

Gregory Wright wrote:
> 
> Hi,
> 
> I've built a compiler with debugging turned on and have obtained
> what might be useful information about the crashes on OS X.
> 
> When I try to do a build, in this case, of NewBinary, I get
> 
> --->  Configuring hs-NewBinary
> DEBUG: Executing proc-pre-com.apple.configure-configure-0
> ghc-6.4.2: internal error: ASSERTION FAILED: file GC.c, line 4356
> 
>     Please report this as a compiler bug.  See:
>     http://www.haskell.org/ghc/reportabug
> Error: Target com.apple.configure returned: shell command "ghc -lintl  
> -o Setup Setup.lhs -package Cabal" returned error 254
> Command output: ghc-6.4.2: internal error: ASSERTION FAILED: file  GC.c, 
> line 4356
> 
> 
> (The ghc output lines are bracketed by some darwinports status info.)
> 
> I've seen the same assertion failure in other cases, but it is
> not entirely repeatable.  Smells like something is not initialized
> or aligned correctly.  (I even got this error from compiling
> 
> main = putStrLn "Hello, World!"
> 
> but that hasn't happened again since I built ghc over.)
> 
> And for some reason when I build ghc on OS X with debugging turned
> on, I need to explicit link in -lintl or I miss a symbol that libbfd  or 
> libiberty is
> looking for. But that is probably neither here nor there.
> 
> The assertion being violated is
> 
>     ASSERT(frame < bottom);
> 
> and it's not surprising that things rapidly go pear shaped if this  
> isn't true.
> 
> Any ideas on how to proceed?  Just as a test, I built a compiler  using 
> GC.c
> from 6.4.1 but it quickly segfaulted.  I just had a hope that the  
> significant changes
> may have been local to the GC.c file.  This is evidently not the case.
> 
> Best Wishes,
> Greg