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{-# OPTIONS_GHC -O2 -fforce-recomp #-}
module T18086 where
import GHC.Stack
import GHC.Utils.Panic.Plain
import Control.Exception
import System.IO.Unsafe
-- Should have strictness signature <L,U>x, emphasis on the exceptional
-- divergence result.
m :: IO ()
m = do
putStrLn "foo"
error "bar"
-- Ditto, just in a more complex scenario (the original reproducer of #18086)
panic :: String -> a
panic x = unsafeDupablePerformIO $ do
stack <- ccsToStrings =<< getCurrentCCS x
if null stack
then throw (PlainPanic x)
else throw (PlainPanic (x ++ '\n' : renderStack stack))
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