simply dont use memchr

Author: bend-n

library/core/src/str/pattern.rs

@@ -395,9 +395,10 @@ unsafe impl<'a> Searcher<'a> for AsciiCharSearcher<'a> {
 
     #[inline(always)]
     fn next_match(&mut self) -> Option<(usize, usize)> {
-        match memchr::memchr(self.needle, unsafe {
-            &self.haystack.as_bytes().get_unchecked(self.finger..self.finger_back)
-        }) {
+        match unsafe { self.haystack.as_bytes().get_unchecked(self.finger..self.finger_back) }
+            .iter()
+            .position(|x| *x == self.needle)
+        {
             Some(x) => {
                 self.finger += x + 1;
                 Some((self.finger - 1, self.finger))