diff --git a/src/test/run-pass/interior-vec.rs b/src/test/run-pass/interior-vec.rs
new file mode 100644
index 00000000000..be1927a1d3d
--- /dev/null
+++ b/src/test/run-pass/interior-vec.rs
@@ -0,0 +1,36 @@
+// xfail-stage0
+// xfail-stage1
+// xfail-stage2
+// xfail-stage3
+
+// works, but leaks in the compiler :(
+
+import rusti::ivec_len;
+
+native "rust-intrinsic" mod rusti {
+    fn ivec_len[T](&T[] v) -> uint;
+}
+
+fn main() {
+    let int[] v = ~[];
+    assert (ivec_len(v) == 0u);     // zero-length
+    auto x = ~[ 1, 2 ];
+    assert (ivec_len(x) == 2u);     // on stack
+    auto y = ~[ 1, 2, 3, 4, 5 ];
+    assert (ivec_len(y) == 5u);     // on heap
+
+    v += ~[];
+    assert (ivec_len(v) == 0u);     // zero-length append
+    x += ~[ 3 ];
+    assert (ivec_len(x) == 3u);     // on-stack append
+    y += ~[ 6, 7, 8, 9 ];
+    assert (ivec_len(y) == 9u);     // on-heap append
+
+    auto vv = v + v;
+    assert (ivec_len(vv) == 0u);     // zero-length add
+    auto xx = x + ~[ 4 ];
+    assert (ivec_len(xx) == 4u);     // on-stack add
+    auto yy = y + ~[ 10, 11 ];
+    assert (ivec_len(yy) == 11u);    // on-heap add
+}
+