Affected versions receive a &[u8] from the caller through a safe API, and pass
it directly to the unsafe str::from_utf8_unchecked function.
The behavior of ferris_says::say is undefined if the bytes from the caller
don't happen to be valid UTF-8.
The flaw was corrected in [ferris-says#21] by using the safe str::from_utf8
instead, and returning an error on invalid input. However this fix has not yet
been published to crates.io as a patch version for 0.2.
Separately, [ferris-says#32] has introduced a different API for version 0.3
which accepts input as &str rather than &[u8], so is unaffected by this bug.
{
"license": "CC0-1.0"
}