1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/bug1837157.js b/js/src/jit-test/tests/cacheir/bug1837157.js
new file mode 100644
index 0000000000..c468a1a259
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/bug1837157.js
@@ -0,0 +1,36 @@
+// |jit-test| --fast-warmup; --no-threads
+with ({}) {}
+
+function foo(a) {
+  a.prop = 0;
+}
+
+class A {
+  set prop(x) { }
+}
+
+function newShape() {
+  class B extends A {}
+  return new B();
+}
+
+function triggerIonCompile() {
+  with ({}) {}
+  for (var i = 0; i < 50; i++) {
+    foo(initialShapes[i % initialShapes.length])
+  }
+}
+
+var initialShapes = [];
+for (var i = 0; i < 8; i++) {
+  initialShapes.push(newShape());
+}
+
+triggerIonCompile();
+
+for (var i = 0; i < 10; i++) {
+  foo(0);
+}
+foo(newShape());
+
+triggerIonCompile();