From a7701c9abd26f5a23e5a885e5a29da46b01f9420 Mon Sep 17 00:00:00 2001
From: Josh Matthews <josh@joshmatthews.net>
Date: Mon, 20 Jun 2016 13:22:53 -0400
Subject: [PATCH] Add a manual test for panicking while JS stack frames exist.

---
 components/script/dom/testbinding.rs             |  2 ++
 components/script/dom/webidls/TestBinding.webidl |  2 ++
 tests/html/panic.html                            | 16 ++++++++++++++++
 3 files changed, 20 insertions(+)
 create mode 100644 tests/html/panic.html

diff --git a/components/script/dom/testbinding.rs b/components/script/dom/testbinding.rs
index 95341751780..745a141efe7 100644
--- a/components/script/dom/testbinding.rs
+++ b/components/script/dom/testbinding.rs
@@ -571,6 +571,8 @@ impl TestBindingMethods for TestBinding {
     fn FuncControlledAttributeEnabled(&self) -> bool { false }
     fn FuncControlledMethodDisabled(&self) {}
     fn FuncControlledMethodEnabled(&self) {}
+
+    fn Panic(&self) { panic!("explicit panic from script") }
 }
 
 impl TestBinding {
diff --git a/components/script/dom/webidls/TestBinding.webidl b/components/script/dom/webidls/TestBinding.webidl
index cdfb9fd18ae..c8796a024a6 100644
--- a/components/script/dom/webidls/TestBinding.webidl
+++ b/components/script/dom/webidls/TestBinding.webidl
@@ -455,4 +455,6 @@ interface TestBinding {
   static void funcControlledStaticMethodEnabled();
   [Func="TestBinding::condition_satisfied"]
   const unsigned short funcControlledConstEnabled = 0;
+
+  void panic();
 };
diff --git a/tests/html/panic.html b/tests/html/panic.html
new file mode 100644
index 00000000000..d9464846d75
--- /dev/null
+++ b/tests/html/panic.html
@@ -0,0 +1,16 @@
+<!-- To exercise these tests, set the `dom.testbinding.enabled` to true.
+     It is expected that the browser will not abort due to failed JS engine assertions. -->
+
+<!-- Straightforward test - invoking a panic from a toplevel script execution -->
+<script>
+(new TestBinding()).panic();
+</script>
+
+<!-- invoking a panic from an event handler which is invoked by native code -->
+<!--<iframe src="data:,hi there" onload="(new TestBinding()).panic()"></iframe>-->
+
+<!-- invoking a panic from an event handler which is invoked by script -->
+<!--<div onclick="(new TestBinding()).panic()"></div>
+<script>
+document.querySelector('div').click();
+</script>-->