diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/saved-stacks/gc-frame-cache.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/saved-stacks/gc-frame-cache.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,76 @@
+// Test that SavedFrame instances get removed from the SavedStacks frames cache
+// after a GC.
+
+const FUZZ_FACTOR = 3;
+
+function assertAboutEq(actual, expected) {
+  if (Math.abs(actual - expected) > FUZZ_FACTOR)
+    throw new Error("Assertion failed: expected about " + expected + ", got " + actual +
+                    ". FUZZ_FACTOR = " + FUZZ_FACTOR);
+}
+
+const stacks = [];
+
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+stacks.push(saveStack());
+
+assertAboutEq(getSavedFrameCount(), 50);
+
+while (stacks.length) {
+  stacks.pop();
+}
+gc();
+
+stacks = null;
+gc();
+
+assertAboutEq(getSavedFrameCount(), 0);