Truncate tweaks (#694)

braddunbar · web-flow · commit 4e2c9c065a06 · 2024-04-17T11:27:00.000+02:00
diff --git a/src/bytes_mut.rs b/src/bytes_mut.rs
@@ -422,8 +422,9 @@ impl BytesMut {
     /// assert_eq!(buf, b"hello"[..]);
     /// ```
     pub fn truncate(&mut self, len: usize) {
-        if len <= self.len() {
+        if len < self.len() {
             unsafe {
+                // SAFETY: Shrinking the buffer cannot expose uninitialized bytes.
                 self.set_len(len);
             }
         }

Original file line number	Diff line number	Diff line change
`@@ -422,8 +422,9 @@ impl BytesMut {`
`422`	`422`	`/// assert_eq!(buf, b"hello"[..]);`
`423`	`423`	/// ```
`424`	`424`	`pub fn truncate(&mut self, len: usize) {`
`425`		`- if len <= self.len() {`
	`425`	`+ if len < self.len() {`
`426`	`426`	`unsafe {`
	`427`	`+ // SAFETY: Shrinking the buffer cannot expose uninitialized bytes.`
`427`	`428`	`self.set_len(len);`
`428`	`429`	`}`
`429`	`430`	`}`