Before filing a bug, please check whether it has been fixed since
the latest release: run "hg pull -u" and retry what you did to
reproduce the problem.  Thanks.

What steps will reproduce the problem?
1. Run program:

package main

import (
    "fmt"
)

func main() {
    var c int
    for {
        fmt.Scanf("%c", &c)
        fmt.Printf("0x%X %c\n", c, c)
    }
}

2. Type non-ascii characters and press enter.

What is the expected output?
For each character entered (including '\n'), that character's hex representation
followed by the character.

What do you see instead?
For non-ascii characters, Scanf reads 0xFFFD


What is your $GOOS?  $GOARCH?
linux 386

Which revision are you using?  (hg identify)
8e47d13b38be+ tip
(also in release)

Please provide any additional information below.