Vec::insert_slice_clone: fix unsound Vec after T::clone panic

qwertz19281 · qwertz19281 · commit 20cb73d39f1c · 2021-02-04T01:40:04.000+01:00
diff --git a/src/imp/vec.rs b/src/imp/vec.rs
@@ -81,6 +81,7 @@ impl<T> VecExt<T> for Vec<T> {
         }
 
         unsafe {
+            self.set_len(0);
             {
                 let mut p = self.as_mut_ptr().add(index);
                 ptr::copy(p, p.add(slen), vlen - index);

Original file line number	Diff line number	Diff line change
`@@ -81,6 +81,7 @@ impl<T> VecExt<T> for Vec<T> {`
`81`	`81`	`}`
`82`	`82`
`83`	`83`	`unsafe {`
	`84`	`+ self.set_len(0);`
`84`	`85`	`{`
`85`	`86`	`let mut p = self.as_mut_ptr().add(index);`
`86`	`87`	`ptr::copy(p, p.add(slen), vlen - index);`