ghc-5.00.2: panic! (the `impossible' happened, GHC version 5.00.2): Oversize heap check detected. Please try compiling with -O.

[Ian Lynagh]

On Mon, Oct 01, 2001 at 10:52:32AM +0100, Simon Marlow wrote:
> 
> > > This is a known bug, but thanks for reporting it anyway.  
> > The workaround
> > > is as suggested, try compiling with -O.
> > 
> > I *was* compiling with -O. IIRC the problem occured with any level of
> > optimisation I tried if and only if profiling was enabled.
> > 
> > Any other suggestions?
> 
> You could try breaking up the structure into smaller pieces.  If you
> have a local GHC build, you can also bump the BLOCK_SIZE to 8k in
> ghc/rts/Constants.h.

Did you mean ghc/includes/Constants.h?

Changing
#define BLOCK_SIZE   0x1000
to
#define BLOCK_SIZE   0x2000
in there and rebuilding produced a build which produces code that
segfaults.


Ian