"evacuate: strange closure type 0" when creating large array
|Reported by:||nad||Owned by:|
|Type of failure:||Runtime crash||Difficulty:||Unknown|
|Test Case:||Blocked By:|
Consider the following code:
module Main where import Data.Array xs :: [Int] xs = [0 .. 64988] crash :: Int -> IO () crash m = array (0, m) [ (x, x) | x <- xs ] `seq` return () strangeClosureType = do print (sum xs) crash (maxBound - 1) segFault1 = crash (maxBound - 1) segFault2 = do print (sum xs) crash (maxBound - 2)
If I compile the program using ghc --make Main.hs -O -main-is strangeClosureType, then I get the following error message:
Main: internal error: evacuate: strange closure type 0 (GHC version 7.6.3 for i386_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Aborted (core dumped)
If I don't use -O, or if I let segFault1 or segFault2 be main, then I get the following error message instead:
Segmentation fault (core dumped)
If the number 30000 is replaced by some other number, then the strange closure error may be replaced by a segfault, or even no error at all.
Perhaps this is another instance of bug #7762; I have only tested using GHC 7.6.3.
I am using base 18.104.22.168 and array 0.4.0.1.