From c366129205376394644f23f60997ea784dbaa7ee Mon Sep 17 00:00:00 2001
From: Yuki Okushi <jtitor@2k36.org>
Date: Sun, 4 Dec 2022 09:43:05 +0900
Subject: [PATCH] Add regression test for #47814

Signed-off-by: Yuki Okushi <jtitor@2k36.org>
---
 src/test/ui/associated-consts/issue-47814.rs     | 14 ++++++++++++++
 src/test/ui/associated-consts/issue-47814.stderr | 14 ++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 src/test/ui/associated-consts/issue-47814.rs
 create mode 100644 src/test/ui/associated-consts/issue-47814.stderr

diff --git a/src/test/ui/associated-consts/issue-47814.rs b/src/test/ui/associated-consts/issue-47814.rs
new file mode 100644
index 0000000000000..a28b1c00113c9
--- /dev/null
+++ b/src/test/ui/associated-consts/issue-47814.rs
@@ -0,0 +1,14 @@
+struct ArpIPv4<'a> {
+    s: &'a u8
+}
+
+impl<'a> ArpIPv4<'a> {
+    const LENGTH: usize = 20;
+
+    pub fn to_buffer() -> [u8; Self::LENGTH] {
+        //~^ ERROR: generic `Self` types are currently not permitted in anonymous constants
+        unimplemented!()
+    }
+}
+
+fn main() {}
diff --git a/src/test/ui/associated-consts/issue-47814.stderr b/src/test/ui/associated-consts/issue-47814.stderr
new file mode 100644
index 0000000000000..2e4ddb81166b4
--- /dev/null
+++ b/src/test/ui/associated-consts/issue-47814.stderr
@@ -0,0 +1,14 @@
+error: generic `Self` types are currently not permitted in anonymous constants
+  --> $DIR/issue-47814.rs:8:32
+   |
+LL |     pub fn to_buffer() -> [u8; Self::LENGTH] {
+   |                                ^^^^
+   |
+note: not a concrete type
+  --> $DIR/issue-47814.rs:5:10
+   |
+LL | impl<'a> ArpIPv4<'a> {
+   |          ^^^^^^^^^^^
+
+error: aborting due to previous error
+