X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Futils%2FPretty.lhs;h=3c003987af3191836e2a63ac02745efa2b3c2cce;hb=3b03f47bbeb96c12351ebd11f6565e1f8cec4241;hp=47d4b1e19e582225cae5e7da5d80aa0966706c52;hpb=831a35dd00faff195cf938659c2dd736192b865f;p=ghc-hetmet.git

diff --git a/compiler/utils/Pretty.lhs b/compiler/utils/Pretty.lhs
index 47d4b1e..3c00398 100644
--- a/compiler/utils/Pretty.lhs
+++ b/compiler/utils/Pretty.lhs
@@ -1000,10 +1000,6 @@ spaces n | n <=# _ILIT(0) = ""
 pprCols :: Int
 pprCols = 100 -- could make configurable
 
--- NB. printDoc prints FastStrings in UTF-8: hPutFS below does no decoding.
--- This is what we usually want, because the IO library has no encoding
--- functionality, and we're assuming UTF-8 source code so we might as well
--- assume UTF-8 output too.
 printDoc :: Mode -> Handle -> Doc -> IO ()
 printDoc LeftMode hdl doc
   = do { printLeftRender hdl doc; hFlush hdl }
@@ -1013,7 +1009,9 @@ printDoc mode hdl doc
   where
     put (Chr c)  next = hPutChar hdl c >> next
     put (Str s)  next = hPutStr  hdl s >> next
-    put (PStr s) next = hPutFS   hdl s >> next
+    put (PStr s) next = hPutStr  hdl (unpackFS s) >> next
+                        -- NB. not hPutFS, we want this to go through
+                        -- the I/O library's encoding layer. (#3398)
     put (LStr s l) next = hPutLitString hdl s l >> next
 
     done = hPutChar hdl '\n'