Upgrade rust/crates/regex to 1.4.5
Test: make
Change-Id: I1d9343bd9712ddd57023af2c5d248993a2c31088
diff --git a/src/backtrack.rs b/src/backtrack.rs
index 2eaeb72..6100c17 100644
--- a/src/backtrack.rs
+++ b/src/backtrack.rs
@@ -115,8 +115,8 @@
// Then we reset all existing allocated space to 0.
// Finally, we request more space if we need it.
//
- // This is all a little circuitous, but doing this unsafely
- // doesn't seem to have a measurable impact on performance.
+ // This is all a little circuitous, but doing this using unchecked
+ // operations doesn't seem to have a measurable impact on performance.
// (Probably because backtracking is limited to such small
// inputs/regexes in the first place.)
let visited_len =