Add tests for exception safety

file-io.cabal

@@ -88,6 +88,14 @@ test-suite T14
     build-depends: base, file-io, filepath, temporary
     ghc-options: -Wall
 
+test-suite T8
+    hs-source-dirs: tests
+    main-is: T8.hs
+    type: exitcode-stdio-1.0
+    default-language: Haskell2010
+    build-depends: base, bytestring, file-io, filepath, temporary
+    ghc-options: -Wall -threaded
+
 test-suite CLC237
     hs-source-dirs: tests
     main-is: CLC237.hs

tests/T8.hs

@@ -0,0 +1,26 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE QuasiQuotes #-}
+
+module Main where
+
+import Control.Concurrent
+import Control.Monad
+import System.File.OsPath
+import System.OsPath
+import System.IO.Temp
+
+import qualified Data.ByteString.Lazy as BL
+import qualified System.OsPath as OSP
+import qualified System.File.OsPath as OSP
+
+main :: IO ()
+main = withSystemTempDirectory "test" $ \baseDir' -> do
+    let fn = [osp|test.txt|]
+    baseDir <- OSP.encodeFS baseDir'
+    let fp = baseDir OSP.</> fn
+    OSP.writeFile fp ""
+
+    replicateM_ 100000 $ do
+      thr <- forkIO (System.File.OsPath.readFile fp >>= BL.putStr)
+      threadDelay 1
+      void $ killThread thr