Rollup merge of #71587 - matthewjasper:promoted-move-errors, r=nikomatsakis

Report cannot move errors in promoted MIR

Closes #70934

4 files changed, 51 insertions, 0 deletions

diff --git a/src/test/ui/borrowck/move-error-in-promoted-2.rs b/src/test/ui/borrowck/move-error-in-promoted-2.rs
new file mode 100644
index 00000000000..13da34f3922
--- /dev/null
+++ b/src/test/ui/borrowck/move-error-in-promoted-2.rs
@@ -0,0 +1,10 @@
+// Regression test for #70934
+
+struct S;
+
+fn foo() {
+    &([S][0],);
+    //~^ ERROR cannot move out of type `[S; 1]`
+}
+
+fn main() {}
diff --git a/src/test/ui/borrowck/move-error-in-promoted-2.stderr b/src/test/ui/borrowck/move-error-in-promoted-2.stderr
new file mode 100644
index 00000000000..38dba94bdd4
--- /dev/null
+++ b/src/test/ui/borrowck/move-error-in-promoted-2.stderr
@@ -0,0 +1,12 @@
+error[E0508]: cannot move out of type `[S; 1]`, a non-copy array
+  --> $DIR/move-error-in-promoted-2.rs:6:7
+   |
+LL |     &([S][0],);
+   |       ^^^^^^
+   |       |
+   |       cannot move out of here
+   |       move occurs because value has type `S`, which does not implement the `Copy` trait
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0508`.
diff --git a/src/test/ui/borrowck/move-error-in-promoted.rs b/src/test/ui/borrowck/move-error-in-promoted.rs
new file mode 100644
index 00000000000..b94db645131
--- /dev/null
+++ b/src/test/ui/borrowck/move-error-in-promoted.rs
@@ -0,0 +1,17 @@
+// Regression test for #70934
+
+fn f() {
+    const C: [S2; 1] = [S2];
+    let _ = S1(C[0]).clone();
+    //~^ ERROR cannot move out of type `[S2; 1]`
+}
+
+#[derive(Clone)]
+struct S1(S2);
+
+#[derive(Clone)]
+struct S2;
+
+fn main() {
+    f();
+}
diff --git a/src/test/ui/borrowck/move-error-in-promoted.stderr b/src/test/ui/borrowck/move-error-in-promoted.stderr
new file mode 100644
index 00000000000..a4432e38da0
--- /dev/null
+++ b/src/test/ui/borrowck/move-error-in-promoted.stderr
@@ -0,0 +1,12 @@
+error[E0508]: cannot move out of type `[S2; 1]`, a non-copy array
+  --> $DIR/move-error-in-promoted.rs:5:16
+   |
+LL |     let _ = S1(C[0]).clone();
+   |                ^^^^
+   |                |
+   |                cannot move out of here
+   |                move occurs because value has type `S2`, which does not implement the `Copy` trait
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0508`.