Runtime system crash (OS X intel -N greater than 4)

I get the following runtime error in my application on my 4-core i7 macbook pro, running GHC 7.4.1 and the llvm backend. I only get this error if I specify -N greater than 4 (perhaps this is a hyperthreading related problem?) and only when the application itself calls the function 'error'. This happens whether I compile with -fllvm or not. My application is called 'mrfy':

mrfy: internal error: mrfy: internal error: scavenge_stack: weird activation record found on stack: 260414112scavenge_stack: weird activation record found on stack: 260414112

(GHC version 7.4.1 for x86_64_apple_darwin)

Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug

Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug

Abort trap: 6

I can provide source if requested.

Trac metadata

Trac field	Value
Version	7.4.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Runtime System
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