uext crashes with -1 (overflow?)

[deian]

@mlfbrown discovered this

import qualified Boolector as Bimport Control.Monad.IO.Class
import Control.Exception (assert)
import Control.Concurrent

main :: IO ()
main = do
 -- Create new Boolector state with a 1s timeout
 bs <- B.newBoolectorState (Just 1)
 B.evalBoolector bs $ do
   -- Create a 8-bit bit-vector
   u8 <- B.bitvecSort 8   -- Create a constant value and two variables of sort u8
   c <- B.unsignedInt 35 u8
   B.uext c 4294967289 -- Crashes in this case but is fine with, say, 87; 88 crashes with > 0 bounds check
   return ()

[deian]

Fixed in boolector: Boolector/boolector@c6de121