What steps will reproduce the problem?

transferring 3 bytes,

  n, err := syscall.Splice(...)
=>
  n has type int64, and value 0x700000003L

What is the expected output?

The manpage declares it as 

       ssize_t splice(int fd_in, loff_t *off_in, int fd_out,
                      loff_t *off_out, size_t len, unsigned int flags);

which is int32 on a 32-bit x86. 


Which compiler are you using (5g, 6g, 8g, gccgo)?

6g

Which operating system are you using?

linux/x86, fedora 14.

Which revision are you using?  (hg identify)

Head from 27 dec:

commit 9024802f87ec541bec358d4a54a5295a7fa4820e
Author: Stefan Nilsson <snilsson@nada.kth.se>
Date:   Mon Dec 27 10:12:10 2010 -0800

    atof: added 'E' as valid token for exponent
    
    R=golang-dev, gri
    CC=golang-dev
    http://golang.org/cl/3827042
    
    Committer: Robert Griesemer <gri@golang.org>