id	summary	reporter	owner	description	type	status	priority	milestone	version	resolution	keywords	cc
30	There is no safe analog of unsafeFreeze	anonymous		"Summary is quite exhaustive here. Such function is required when one needs snapshot of mutable vector which will be mutated afterwards. Improper usage of unsafeFreeze already caused bug in mwc-random.

Here is safeFreeze I used:

{{{
-- Safe version of unsafeFreeze.
safeFreeze :: (PrimMonad m, Vector v a) => G.Mutable v (PrimState m) a -> m (v a)
safeFreeze v = do
  v' <- GM.unsafeNew (GM.length v)
  GM.unsafeCopy v' v
  unsafeFreeze v'
}}}
"	defect	closed	major			worksforme		alexey.skladnoy@…