1 files changed, 25 insertions, 0 deletions
diff --git a/modules/libpref/test/unit/test_bug345529.js b/modules/libpref/test/unit/test_bug345529.js
new file mode 100644
index 0000000000..05fce35f57
--- /dev/null
+++ b/modules/libpref/test/unit/test_bug345529.js
@@ -0,0 +1,25 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/  */
+
+// Regression test for bug 345529 - crash removing an observer during an
+// nsPref:changed notification.
+function run_test() {
+  const PREF_NAME = "testPref";
+
+  var observer = {
+    QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
+
+    observe: function observe(aSubject, aTopic, aState) {
+      Services.prefs.removeObserver(PREF_NAME, observer);
+    },
+  };
+  Services.prefs.addObserver(PREF_NAME, observer);
+
+  Services.prefs.setCharPref(PREF_NAME, "test0");
+  // This second call isn't needed on a clean profile: it makes sure
+  // the observer gets called even if the pref already had the value
+  // "test0" before this test.
+  Services.prefs.setCharPref(PREF_NAME, "test1");
+
+  Assert.ok(true);
+}