[Haskell] Blocked STM & GC question

[Ashley Yakeley]

If I have a thread that's blocked on an STM retry or TChan read, and 
none of its TVars are referenced elsewhere, will it get stopped and 
garbage-collected?

I have in mind a pump thread that eternally reads off a TChan and pushes 
the result to some function. If the TChan is forgotten elsewhere, will 
the permanently blocked thread still sit around using up some small 
amount of memory, or will it be reaped by the garbage collector?

-- 
Ashley Yakeley
Seattle WA