4 files changed, 36 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/bug-1884927.js b/js/src/jit-test/tests/collections/bug-1884927.js
new file mode 100644
index 0000000000..263d9df8a0
--- /dev/null
+++ b/js/src/jit-test/tests/collections/bug-1884927.js
@@ -0,0 +1,10 @@
+// |jit-test| --enable-symbols-as-weakmap-keys; skip-if: getBuildConfiguration("release_or_beta")
+for (x=0; x<10000; ++x) {
+  try {
+    m13 = new WeakMap;
+    sym = Symbol();
+    m13.set(sym, new Debugger);
+    startgc(1, );
+  } catch (exc) {}
+}
+
diff --git a/js/src/jit-test/tests/collections/bug-1885775.js b/js/src/jit-test/tests/collections/bug-1885775.js
new file mode 100644
index 0000000000..bc14c6d58b
--- /dev/null
+++ b/js/src/jit-test/tests/collections/bug-1885775.js
@@ -0,0 +1,12 @@
+// |jit-test| --enable-symbols-as-weakmap-keys; skip-if: getBuildConfiguration("release_or_beta")
+var code = `
+var m58 = new WeakMap;
+var sym = Symbol();
+m58.set(sym, ({ entry16: 0, length: 1 }));
+function testCompacting() {
+  gcslice(50000);
+}
+testCompacting(2, 100000, 50000);
+`;
+for (x = 0; x < 10000; ++x)
+  evaluate(code);
diff --git a/js/src/jit-test/tests/collections/bug-1887939-1.js b/js/src/jit-test/tests/collections/bug-1887939-1.js
new file mode 100644
index 0000000000..292c44d492
--- /dev/null
+++ b/js/src/jit-test/tests/collections/bug-1887939-1.js
@@ -0,0 +1,7 @@
+var map = new WeakMap();
+var sym = Symbol();
+try {
+  map.set(sym, 1);
+} catch (e) {
+  assertEq(!!e.message.match(/an unregistered symbol/), false);
+}
diff --git a/js/src/jit-test/tests/collections/bug-1887939-2.js b/js/src/jit-test/tests/collections/bug-1887939-2.js
new file mode 100644
index 0000000000..2ec4e4c585
--- /dev/null
+++ b/js/src/jit-test/tests/collections/bug-1887939-2.js
@@ -0,0 +1,7 @@
+// |jit-test| --enable-symbols-as-weakmap-keys; skip-if: getBuildConfiguration("release_or_beta")
+var map = new WeakMap();
+try {
+  map.set(1, 1);
+} catch (e) {
+  assertEq(!!e.message.match(/an unregistered symbol/), true);
+}