From 39aa116d95c5521cef63f9fd46712de427c3fdb3 Mon Sep 17 00:00:00 2001
From: Jonathan Protzenko <jonathan.protzenko@gmail.com>
Date: Tue, 31 May 2011 20:18:21 +0200
Subject: [PATCH] Bug 658351 - Add extra assertions to jsval.h to check for
 malformed JSBools r=mrbkap

---
 js/src/jsval.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/js/src/jsval.h b/js/src/jsval.h
index f76f2970b7a..c871481df87 100644
--- a/js/src/jsval.h
+++ b/js/src/jsval.h
@@ -462,6 +462,10 @@ static JS_ALWAYS_INLINE jsval_layout
 BOOLEAN_TO_JSVAL_IMPL(JSBool b)
 {
     jsval_layout l;
+
+    // Happens if XPConnect hands out an illegal value (constructed from C++ through a PRBool, for
+    // instance).
+    JS_ASSERT(b == JS_TRUE || b == JS_FALSE);
     l.s.tag = JSVAL_TAG_BOOLEAN;
     l.s.payload.boo = b;
     return l;
@@ -654,6 +658,10 @@ static JS_ALWAYS_INLINE jsval_layout
 BOOLEAN_TO_JSVAL_IMPL(JSBool b)
 {
     jsval_layout l;
+
+    // Happens if XPConnect hands out an illegal value (constructed from C++ through a PRBool, for
+    // instance).
+    JS_ASSERT(b == JS_TRUE || b == JS_FALSE);
     l.asBits = ((uint64)(uint32)b) | JSVAL_SHIFTED_TAG_BOOLEAN;
     return l;
 }