Is there a way to limit the memory, ghci can have?

Question

I\'m used to debug my code using ghci. Often, something like this happens (not so obvious, of course):

ghci> let f@(_:x) = 0:1:zipWith(+)f x
ghci> leng         


        

Answer 1

A platform independant way to accomplish this is to supply the -M option as on option to the Haskell runtime like this

ghci +RTS -M1m

see the GHC documentation’s page on how to control the RTS (runtime system) for details.

The ghci output now looks like:

>ghci +RTS -M10m
GHCi, version 6.12.3: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
Prelude> let f@(_:x) = 0:1:zipWith(+)f x
Prelude> length f
Heap exhausted;
Current maximum heap size is 10485760 bytes (10 MB);
use `+RTS -M' to increase it.