Help: Windows ghc profiler errors

Bayley, Alistair
Thu, 14 Nov 2002 17:27:39 -0000

I want to profile my Haskell program (it solves the Queens and Knights
problem stated here: ).
I'm compiling with GHC 5.04.1 under Windows NT using the following command
line (as per the Users Guide):

>ghc -prof -auto-all -o queens --make Main

When I run the program with the following command lines I get:

queens: fatal error: evacuate: strange closure type 1696

>queens +RTS
queens: fatal error: evacuate: strange closure type 1728

>queens +RTS -p
queens: fatal error: evacuate: strange closure type 1760

(I have no idea if the change in closure type is significant, but it is
quite clearly related to the command line options used.)

The program works without profiling (whether or not it produces the correct
answers is another matter). I just want to practice profiling and optimising
Haskell programs.

I've also tried running the profiler with a minimal program:

> module Main where
> main :: IO ()
> main = do putStrLn "hello world"

... and I get a segmentation fault.

Anyway, I've had a quick look through the last couple of months of mailing
list archives and haven't noticed anything related to this error. Any ideas?


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