[Haskell-cafe] STM, newArray, and a stack overflow?
Bas van Dijk
v.dijk.bas at gmail.com
Wed Mar 23 18:42:31 CET 2011
On 23 March 2011 17:19, Jake McArthur <jake.mcarthur at gmail.com> wrote:
> On 03/23/2011 10:34 AM, Ketil Malde wrote:
>> It works (calling the same function) from GHCi, but breaks when
>> compiled. Also when compiling with -O0.
> Confirmed for GHC 7.0.2. Works fine in GHCi, but compiling it (in my case,
> with -O) and running the executable causes a stack overflow unless I run it
> with +RTS -K16m, and even then it spends 90% of its time in GC. This looks
> like it is probably a bug, to me. Maybe it should be reported in GHC's Trac?
It looks like a bug indeed.
The problem can be reduced to just:
atomically $ replicateM 1000000 (newTVar undefined)
or even simpler:
replicateM 1000000 (newIORef undefined)
More information about the Haskell-Cafe