Rollup merge of #80404 - JulianKnodt:arr_ref, r=oli-obk

Remove const_in_array_repeat

Fixes #80371. Fixes #81315. Fixes #80767. Fixes #75682.

I thought there might be some issue with `Repeats(_, 0)`, but if you increase the items in the array it still ICEs. I'm not sure if this is the best fix but it does fix the given issue.

2 files changed, 34 insertions, 0 deletions

diff --git a/src/test/ui/array-slice-vec/repeat_empty_ok.rs b/src/test/ui/array-slice-vec/repeat_empty_ok.rs
new file mode 100644
index 00000000000..25463ea5ee8
--- /dev/null
+++ b/src/test/ui/array-slice-vec/repeat_empty_ok.rs
@@ -0,0 +1,15 @@
+#![crate_type = "lib"]
+
+pub struct Header<'a> {
+    pub value: &'a [u8],
+}
+
+pub fn test() {
+    let headers = [Header{value: &[]}; 128];
+    //~^ ERROR the trait bound
+}
+
+pub fn test2() {
+    let headers = [Header{value: &[0]}; 128];
+    //~^ ERROR the trait bound
+}
diff --git a/src/test/ui/array-slice-vec/repeat_empty_ok.stderr b/src/test/ui/array-slice-vec/repeat_empty_ok.stderr
new file mode 100644
index 00000000000..85baa1268bf
--- /dev/null
+++ b/src/test/ui/array-slice-vec/repeat_empty_ok.stderr
@@ -0,0 +1,19 @@
+error[E0277]: the trait bound `Header<'_>: Copy` is not satisfied
+  --> $DIR/repeat_empty_ok.rs:8:19
+   |
+LL |     let headers = [Header{value: &[]}; 128];
+   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `Header<'_>`
+   |
+   = note: the `Copy` trait is required because the repeated element will be copied
+
+error[E0277]: the trait bound `Header<'_>: Copy` is not satisfied
+  --> $DIR/repeat_empty_ok.rs:13:19
+   |
+LL |     let headers = [Header{value: &[0]}; 128];
+   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `Header<'_>`
+   |
+   = note: the `Copy` trait is required because the repeated element will be copied
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0277`.