diff --git a/collector/benchmarks/deeply-nested/Cargo.lock b/collector/benchmarks/deeply-nested/Cargo.lock
new file mode 100644
index 000000000..578e8faa2
--- /dev/null
+++ b/collector/benchmarks/deeply-nested/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "deeply-nested"
+version = "0.1.0"
+
diff --git a/collector/benchmarks/deeply-nested/Cargo.toml b/collector/benchmarks/deeply-nested/Cargo.toml
new file mode 100644
index 000000000..bfc21c107
--- /dev/null
+++ b/collector/benchmarks/deeply-nested/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deeply-nested"
+version = "0.1.0"
+authors = ["Tatsuyuki Ishi <ishitatsuyuki@gmail.com>"]
+
+[dependencies]
diff --git a/collector/benchmarks/deeply-nested/src/lib.rs b/collector/benchmarks/deeply-nested/src/lib.rs
new file mode 100644
index 000000000..25dc908ed
--- /dev/null
+++ b/collector/benchmarks/deeply-nested/src/lib.rs
@@ -0,0 +1,26 @@
+// A test case from rust-lang/rust#38528.
+// The original blowup had both exponential compute and memory complexity.
+// The nesting should be kept at 16 level to avoid crashing the test machine.
+
+pub fn foo() -> Box<Iterator<Item = ()>> {
+    use std::iter::empty;
+
+    Box::new(empty()
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty()) // 10th .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty())
+        .chain(empty()) // 16th .chain(empty())
+    )
+}