#6016: On Windows, runhaskell hits an error on UTF-8 files with a BOM -------------------------------------+------------------------------------- Reporter: vsajip | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 7.0.4 (Parser) | Keywords: BOM Resolution: | Operating System: Unknown/Multiple Differential Revisions: | Type of failure: GHC rejects Architecture: | valid program Unknown/Multiple | Test Case: Difficulty: Unknown | Blocking: Blocked By: | Related Tickets: #1744 | -------------------------------------+------------------------------------- Changes (by thomie): * os: Windows => Unknown/Multiple * related: => #1744 Old description:

The file

{{{ #!/usr/bin/env runhaskell main = putStrLn "Hello, world!" }}} works on Windows as expected:

{{{ C:\Temp>runhaskell hello.hs Hello, world! }}} However, if the file is saved as UTF-8 with a BOM (Windows Notepad, for example, sometimes adds this BOM to files), an error occurs:

{{{ C:\Temp>runhaskell hello2.hs

hello2.hs:1:1: parse error on input `#!/' }}}

I'm using the Haskell Platform 2011.4.0.0.

I believe that runhaskell/runghc should handle the presence of a BOM correctly; some Windows programs insert a BOM unbeknownst to the user.

This behaviour was observed on Windows XP (32-bit) and Windows 7 (32-bit and 64-bit).

New description: The file {{{ #!/usr/bin/env runhaskell main = putStrLn "Hello, world!" }}} works as expected: {{{ C:\Temp>runhaskell hello.hs Hello, world! }}} However, if the file is saved as UTF-8 with a BOM (Windows Notepad, for example, sometimes adds this BOM to files), an error occurs: {{{ C:\Temp>runhaskell hello2.hs hello2.hs:1:1: parse error on input `#!/' }}} I'm using the Haskell Platform 2011.4.0.0. I believe that runhaskell/runghc should handle the presence of a BOM correctly; some Windows programs insert a BOM unbeknownst to the user. This behaviour was observed on Windows XP (32-bit) and Windows 7 (32-bit and 64-bit). -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/6016#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler