1 files changed, 20 insertions, 0 deletions
diff --git a/tests/incremental/issue-54242.rs b/tests/incremental/issue-54242.rs
new file mode 100644
index 000000000..806c84152
--- /dev/null
+++ b/tests/incremental/issue-54242.rs
@@ -0,0 +1,20 @@
+// revisions: rpass cfail
+
+trait Tr
+where
+    (Self::Arr,): Sized,
+{
+    type Arr;
+
+    const C: usize = 0;
+}
+
+impl Tr for str {
+    #[cfg(rpass)]
+    type Arr = [u8; 8];
+    #[cfg(cfail)]
+    type Arr = [u8; Self::C];
+    //[cfail]~^ ERROR cycle detected when evaluating type-level constant
+}
+
+fn main() {}