1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/gc/bug-1872524.js b/js/src/jit-test/tests/gc/bug-1872524.js
new file mode 100644
index 0000000000..877a773a1f
--- /dev/null
+++ b/js/src/jit-test/tests/gc/bug-1872524.js
@@ -0,0 +1,17 @@
+// Attempt to break invariant that smallHeapIncrementalLimit >=
+// largeHeapIncrementalLimit and check that it is maintained.
+
+function checkInvariant() {
+  return gcparam("smallHeapIncrementalLimit") >=
+         gcparam("largeHeapIncrementalLimit");
+}
+
+assertEq(checkInvariant(), true);
+
+const smallLimit = gcparam("smallHeapIncrementalLimit");
+gcparam("largeHeapIncrementalLimit", smallLimit + 1);
+assertEq(checkInvariant(), true);
+
+const largeLimit = gcparam("largeHeapIncrementalLimit");
+gcparam("smallHeapIncrementalLimit", largeLimit - 1);
+assertEq(checkInvariant(), true);