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Today's Topics:
1. Re: System.USB.writeInterrupt -- confused by error message
from type system (Brent Yorgey)
2. Re: System.USB.writeInterrupt -- confused by error message
from type system (emacstheviking)
----------------------------------------------------------------------
Message: 1
Date: Wed, 27 Feb 2013 16:24:29 -0500
From: Brent Yorgey <[email protected]>
Subject: Re: [Haskell-beginners] System.USB.writeInterrupt -- confused
by error message from type system
To: [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
On Wed, Feb 27, 2013 at 09:06:30PM +0000, emacstheviking wrote:
> HURRAH! I have finally got it to compile...
>
> I manually deleted the broken packages (I play too much anyway so a tidy up
> was in order) and it still failed with:
>
> [1 of 1] Compiling Main ( usb1.hs, usb1.o )
>
> usb1.hs:64:28:
> Couldn't match expected type
> `bytestring-0.9.2.1:Data.ByteString.Internal.ByteString'
> with actual type `ByteString'
Glad you got it to work! For future reference, the fact that the
error message includes a package name and version number
(bytestring-0.9.2.1:Data.ByteString.Internal.ByteString instead of
just Data.ByteString.Internal.ByteString) is usually a very strong
indication that the real problem is multiple versions of the package
interfering with one another.
-Brent
------------------------------
Message: 2
Date: Wed, 27 Feb 2013 21:30:21 +0000
From: emacstheviking <[email protected]>
Subject: Re: [Haskell-beginners] System.USB.writeInterrupt -- confused
by error message from type system
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Message-ID:
<CAEiEuUKh+EFHpGfk6NGM2=_z-Bh8HkO=i9pu15gnyo_fmjj...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Thanks for assist Brent! (Always wanted to say that etc).
Well, this was the first time that it has ever happened to me and so I
guess I didn't appreciate the underlying cause.... once bitten and all that.
Thanks again everybody!
:)
On 27 February 2013 21:24, Brent Yorgey <[email protected]> wrote:
> On Wed, Feb 27, 2013 at 09:06:30PM +0000, emacstheviking wrote:
> > HURRAH! I have finally got it to compile...
> >
> > I manually deleted the broken packages (I play too much anyway so a tidy
> up
> > was in order) and it still failed with:
> >
> > [1 of 1] Compiling Main ( usb1.hs, usb1.o )
> >
> > usb1.hs:64:28:
> > Couldn't match expected type
> > `bytestring-0.9.2.1:Data.ByteString.Internal.ByteString'
> > with actual type `ByteString'
>
> Glad you got it to work! For future reference, the fact that the
> error message includes a package name and version number
> (bytestring-0.9.2.1:Data.ByteString.Internal.ByteString instead of
> just Data.ByteString.Internal.ByteString) is usually a very strong
> indication that the real problem is multiple versions of the package
> interfering with one another.
>
> -Brent
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
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