New upstream version 1.52.1+dfsg1

[rustc.git] / src / tools / clippy / tests / ui / unnecessary_clone.stderr

diff --git a/src/tools/clippy/tests/ui/unnecessary_clone.stderr b/src/tools/clippy/tests/ui/unnecessary_clone.stderr
new file mode 100644 (file)
index 0000000..9df1ae5
--- /dev/null
+++ b/src/tools/clippy/tests/ui/unnecessary_clone.stderr
@@ -0,0 +1,106 @@
+error: using `.clone()` on a ref-counted pointer
+  --> $DIR/unnecessary_clone.rs:23:5
+   |
+LL |     rc.clone();
+   |     ^^^^^^^^^^ help: try this: `Rc::<bool>::clone(&rc)`
+   |
+   = note: `-D clippy::clone-on-ref-ptr` implied by `-D warnings`
+
+error: using `.clone()` on a ref-counted pointer
+  --> $DIR/unnecessary_clone.rs:26:5
+   |
+LL |     arc.clone();
+   |     ^^^^^^^^^^^ help: try this: `Arc::<bool>::clone(&arc)`
+
+error: using `.clone()` on a ref-counted pointer
+  --> $DIR/unnecessary_clone.rs:29:5
+   |
+LL |     rcweak.clone();
+   |     ^^^^^^^^^^^^^^ help: try this: `Weak::<bool>::clone(&rcweak)`
+
+error: using `.clone()` on a ref-counted pointer
+  --> $DIR/unnecessary_clone.rs:32:5
+   |
+LL |     arc_weak.clone();
+   |     ^^^^^^^^^^^^^^^^ help: try this: `Weak::<bool>::clone(&arc_weak)`
+
+error: using `.clone()` on a ref-counted pointer
+  --> $DIR/unnecessary_clone.rs:36:33
+   |
+LL |     let _: Arc<dyn SomeTrait> = x.clone();
+   |                                 ^^^^^^^^^ help: try this: `Arc::<SomeImpl>::clone(&x)`
+
+error: using `clone` on type `T` which implements the `Copy` trait
+  --> $DIR/unnecessary_clone.rs:40:5
+   |
+LL |     t.clone();
+   |     ^^^^^^^^^ help: try removing the `clone` call: `t`
+   |
+   = note: `-D clippy::clone-on-copy` implied by `-D warnings`
+
+error: using `clone` on type `std::option::Option<T>` which implements the `Copy` trait
+  --> $DIR/unnecessary_clone.rs:42:5
+   |
+LL |     Some(t).clone();
+   |     ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `Some(t)`
+
+error: using `clone` on a double-reference; this will copy the reference of type `&std::vec::Vec<i32>` instead of cloning the inner type
+  --> $DIR/unnecessary_clone.rs:48:22
+   |
+LL |     let z: &Vec<_> = y.clone();
+   |                      ^^^^^^^^^
+   |
+   = note: `#[deny(clippy::clone_double_ref)]` on by default
+help: try dereferencing it
+   |
+LL |     let z: &Vec<_> = &(*y).clone();
+   |                      ^^^^^^^^^^^^^
+help: or try being explicit if you are sure, that you want to clone a reference
+   |
+LL |     let z: &Vec<_> = <&std::vec::Vec<i32>>::clone(y);
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: using `clone` on type `many_derefs::E` which implements the `Copy` trait
+  --> $DIR/unnecessary_clone.rs:84:20
+   |
+LL |         let _: E = a.clone();
+   |                    ^^^^^^^^^ help: try dereferencing it: `*****a`
+
+error: using `clone` on a double-reference; this will copy the reference of type `&[u8]` instead of cloning the inner type
+  --> $DIR/unnecessary_clone.rs:89:22
+   |
+LL |         let _ = &mut encoded.clone();
+   |                      ^^^^^^^^^^^^^^^
+   |
+help: try dereferencing it
+   |
+LL |         let _ = &mut &(*encoded).clone();
+   |                      ^^^^^^^^^^^^^^^^^^^
+help: or try being explicit if you are sure, that you want to clone a reference
+   |
+LL |         let _ = &mut <&[u8]>::clone(encoded);
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^
+
+error: using `clone` on a double-reference; this will copy the reference of type `&[u8]` instead of cloning the inner type
+  --> $DIR/unnecessary_clone.rs:90:18
+   |
+LL |         let _ = &encoded.clone();
+   |                  ^^^^^^^^^^^^^^^
+   |
+help: try dereferencing it
+   |
+LL |         let _ = &&(*encoded).clone();
+   |                  ^^^^^^^^^^^^^^^^^^^
+help: or try being explicit if you are sure, that you want to clone a reference
+   |
+LL |         let _ = &<&[u8]>::clone(encoded);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^
+
+error: using `.clone()` on a ref-counted pointer
+  --> $DIR/unnecessary_clone.rs:108:14
+   |
+LL |         Some(try_opt!(Some(rc)).clone())
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `Rc::<u8>::clone(&try_opt!(Some(rc)))`
+
+error: aborting due to 12 previous errors
+