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Do not use pointer alignment on unsupported platforms

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This commit is contained in:
Justin Ridgewell 2019-07-05 16:39:56 -04:00
parent 3d2c4ff456
commit 3b6e8ed502
1 changed files with 1 additions and 1 deletions
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2
src/libcore/str/mod.rs
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@ -1497,7 +1497,7 @@ fn run_utf8_validation(v: &[u8]) -> Result<(), Utf8Error> {
// Ascii case, try to skip forward quickly.
// When the pointer is aligned, read 2 words of data per iteration
// until we find a word containing a non-ascii byte.
if align.wrapping_sub(index) % usize_bytes == 0 {
if align != usize::max_value() && align.wrapping_sub(index) % usize_bytes == 0 {
let ptr = v.as_ptr();
while index < blocks_end {
unsafe {