threadDelay causes segfault on Mac if compiled by 32bit GHC

The following code causes segfault

main :: IO ()
main = do
    replicateM_ 100 $ forkIO $ do
        threadDelay 1000000 
        putStrLn "Hello, world!"
    threadDelay 5000000

if compiled with 32bit GHC head on Mac.

64bit GHC head does not cause this problem. 32bit GHC 7.4.2 does not, either. I don't see this bug both on FreeBSD and Linux.

"gdb" caught the following on each run:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000005
[Switching to process 51076 thread 0x20b]
0x00000005 in ?? ()

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000019
[Switching to process 50933 thread 0x20b]
0x00000019 in ?? ()

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x40e40348
[Switching to process 51004 thread 0x20b]
0x00f28aa5 in base_GHCziEventziPSQ_atMostzuzdszdwatMosts_info ()

Trac metadata

Trac field	Value
Version	7.6.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown/Multiple
Architecture	Unknown/Multiple