1 files changed, 4 insertions, 1 deletions
diff --git a/components/script/dom/bindings/error.rs b/components/script/dom/bindings/error.rs
index da460ad94b6..5953a013d6d 100644
--- a/components/script/dom/bindings/error.rs
+++ b/components/script/dom/bindings/error.rs
@@ -303,7 +303,10 @@ impl Error {
         global: &GlobalScope,
         rval: MutableHandleValue,
     ) {
-        assert!(!JS_IsExceptionPending(cx));
+        match self {
+            Error::JSFailed => (),
+            _ => assert!(!JS_IsExceptionPending(cx)),
+        }
         throw_dom_exception(cx, global, self);
         assert!(JS_IsExceptionPending(cx));
         assert!(JS_GetPendingException(cx, rval));