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-rw-r--r--src/Text/Pandoc/Shared.hs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/Text/Pandoc/Shared.hs b/src/Text/Pandoc/Shared.hs
index 4420199f2..3df016996 100644
--- a/src/Text/Pandoc/Shared.hs
+++ b/src/Text/Pandoc/Shared.hs
@@ -999,8 +999,8 @@ openURL u
-- Error reporting
--
-err :: Int -> String -> IO a
-err exitCode msg = do
+err :: MonadIO m => Int -> String -> m a
+err exitCode msg = liftIO $ do
UTF8.hPutStrLn stderr msg
exitWith $ ExitFailure exitCode
return undefined