1 files changed, 22 insertions, 0 deletions
diff --git a/tests/ui/dst/issue-90528-unsizing-suggestion-3.rs b/tests/ui/dst/issue-90528-unsizing-suggestion-3.rs
new file mode 100644
index 000000000..218843d05
--- /dev/null
+++ b/tests/ui/dst/issue-90528-unsizing-suggestion-3.rs
@@ -0,0 +1,22 @@
+// Issue #90528: provide helpful suggestions when a trait bound is unsatisfied
+// due to a missed unsizing coercion.
+//
+// This test exercises array literals and a trait implemented on mutable slices.
+
+trait Write {}
+
+impl Write for &mut [u8] {}
+
+fn wants_write(_: impl Write) {}
+
+fn main() {
+    wants_write([0u8]);
+    //~^ ERROR the trait bound `[u8; 1]: Write` is not satisfied
+    wants_write(&mut [0u8]);
+    //~^ ERROR the trait bound `&mut [u8; 1]: Write` is not satisfied
+    wants_write(&mut [0u8][..]);
+    wants_write(&[0u8]);
+    //~^ ERROR the trait bound `&[u8; 1]: Write` is not satisfied
+    wants_write(&[0u8][..]);
+    //~^ ERROR the trait bound `&[u8]: Write` is not satisfied
+}