--- a/libraries/source/spidermonkey/build.sh	2015-11-05 01:31:26.204848864 +0100
+++ b/libraries/source/spidermonkey/build.sh	2015-11-05 01:32:31.717771625 +0100
@@ -84,6 +84,9 @@
 # It makes quite a big difference for performance.
 # https://bugzilla.mozilla.org/show_bug.cgi?id=1046176
 patch -p1 -i ../FixForOfBailouts.diff
+
+# don't return nullptrs in bool functions
+patch -p1 -i ../bool-nullptr-return.diff
 cd ..
 
 # Clean up header files that may be left over by earlier versions of SpiderMonkey
--- /dev/null	2015-11-02 02:46:51.863218540 +0100
+++ b/libraries/source/spidermonkey/bool-nullptr-return.diff	2015-11-05 01:46:16.839831506 +0100
@@ -0,0 +1,151 @@
+--- a/js/src/frontend/BytecodeCompiler.cpp	2015-11-05 01:09:52.563331263 +0100
++++ b/js/src/frontend/BytecodeCompiler.cpp	2015-11-05 00:57:40.641427973 +0100
+@@ -544,7 +544,7 @@
+ 
+     RootedScriptSource sourceObject(cx, CreateScriptSourceObject(cx, options));
+     if (!sourceObject)
+-        return nullptr;
++        return false;
+     ScriptSource *ss = sourceObject->source();
+ 
+     SourceCompressionTask sct(cx);
+--- a/js/src/builtin/TypedObject.cpp	2015-11-05 01:16:52.147112669 +0100
++++ b/js/src/builtin/TypedObject.cpp	2015-11-05 00:56:15.208587236 +0100
+@@ -710,12 +710,12 @@
+     contents.append(")");
+     RootedAtom stringRepr(cx, contents.finishAtom());
+     if (!stringRepr)
+-        return nullptr;
++        return false;
+ 
+     // Extract ArrayType.prototype
+     RootedObject arrayTypePrototype(cx, GetPrototype(cx, arrayTypeGlobal));
+     if (!arrayTypePrototype)
+-        return nullptr;
++        return false;
+ 
+     // Create the instance of ArrayType
+     Rooted<UnsizedArrayTypeDescr *> obj(cx);
+@@ -728,7 +728,7 @@
+     if (!JSObject::defineProperty(cx, obj, cx->names().length,
+                                   UndefinedHandleValue, nullptr, nullptr,
+                                   JSPROP_READONLY | JSPROP_PERMANENT))
+-        return nullptr;
++        return false;
+ 
+     args.rval().setObject(*obj);
+     return true;
+@@ -762,7 +762,7 @@
+     if (!size.isValid()) {
+         JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
+                              JSMSG_TYPEDOBJECT_TOO_BIG);
+-        return nullptr;
++        return false;
+     }
+ 
+     // Construct a canonical string `new ArrayType(<elementType>).dimension(N)`:
+@@ -775,7 +775,7 @@
+     contents.append(")");
+     RootedAtom stringRepr(cx, contents.finishAtom());
+     if (!stringRepr)
+-        return nullptr;
++        return false;
+ 
+     // Create the sized type object.
+     Rooted<SizedArrayTypeDescr*> obj(cx);
+@@ -793,7 +793,7 @@
+     if (!JSObject::defineProperty(cx, obj, cx->names().length,
+                                   lengthVal, nullptr, nullptr,
+                                   JSPROP_READONLY | JSPROP_PERMANENT))
+-        return nullptr;
++        return false;
+ 
+     // Add `unsized` property, which is a link from the sized
+     // array to the unsized array.
+@@ -801,7 +801,7 @@
+     if (!JSObject::defineProperty(cx, obj, cx->names().unsized,
+                                   unsizedTypeDescrValue, nullptr, nullptr,
+                                   JSPROP_READONLY | JSPROP_PERMANENT))
+-        return nullptr;
++        return false;
+ 
+     args.rval().setObject(*obj);
+     return true;
+@@ -1253,7 +1253,7 @@
+     Rooted<TypedProto*> proto(cx);
+     proto = NewObjectWithProto<TypedProto>(cx, objProto, nullptr, TenuredObject);
+     if (!proto)
+-        return nullptr;
++        return false;
+     proto->initTypeDescrSlot(*descr);
+     descr->initReservedSlot(JS_DESCR_SLOT_TYPROTO, ObjectValue(*proto));
+ 
+@@ -1358,14 +1358,14 @@
+ #define BINARYDATA_SCALAR_DEFINE(constant_, type_, name_)                       \
+     if (!DefineSimpleTypeDescr<ScalarTypeDescr>(cx, global, module, constant_,      \
+                                             cx->names().name_))                 \
+-        return nullptr;
++        return false;
+     JS_FOR_EACH_SCALAR_TYPE_REPR(BINARYDATA_SCALAR_DEFINE)
+ #undef BINARYDATA_SCALAR_DEFINE
+ 
+ #define BINARYDATA_REFERENCE_DEFINE(constant_, type_, name_)                    \
+     if (!DefineSimpleTypeDescr<ReferenceTypeDescr>(cx, global, module, constant_,   \
+                                                cx->names().name_))              \
+-        return nullptr;
++        return false;
+     JS_FOR_EACH_REFERENCE_TYPE_REPR(BINARYDATA_REFERENCE_DEFINE)
+ #undef BINARYDATA_REFERENCE_DEFINE
+ 
+@@ -1375,14 +1375,14 @@
+     arrayType = DefineMetaTypeDescr<ArrayMetaTypeDescr>(
+         cx, global, module, TypedObjectModuleObject::ArrayTypePrototype);
+     if (!arrayType)
+-        return nullptr;
++        return false;
+ 
+     RootedValue arrayTypeValue(cx, ObjectValue(*arrayType));
+     if (!JSObject::defineProperty(cx, module, cx->names().ArrayType,
+                                   arrayTypeValue,
+                                   nullptr, nullptr,
+                                   JSPROP_READONLY | JSPROP_PERMANENT))
+-        return nullptr;
++        return false;
+ 
+     // StructType.
+ 
+@@ -1390,14 +1390,14 @@
+     structType = DefineMetaTypeDescr<StructMetaTypeDescr>(
+         cx, global, module, TypedObjectModuleObject::StructTypePrototype);
+     if (!structType)
+-        return nullptr;
++        return false;
+ 
+     RootedValue structTypeValue(cx, ObjectValue(*structType));
+     if (!JSObject::defineProperty(cx, module, cx->names().StructType,
+                                   structTypeValue,
+                                   nullptr, nullptr,
+                                   JSPROP_READONLY | JSPROP_PERMANENT))
+-        return nullptr;
++        return false;
+ 
+     // Everything is setup, install module on the global object:
+     RootedValue moduleValue(cx, ObjectValue(*module));
+@@ -1407,7 +1407,7 @@
+                                   nullptr, nullptr,
+                                   0))
+     {
+-        return nullptr;
++        return false;
+     }
+ 
+     return module;
+@@ -2466,7 +2466,7 @@
+         if (length < 0) {
+             JS_ReportErrorNumber(cx, js_GetErrorMessage,
+                                  nullptr, JSMSG_TYPEDOBJECT_BAD_ARGS);
+-            return nullptr;
++            return false;
+         }
+         Rooted<TypedObject*> obj(cx, createZeroed(cx, callee, length));
+         if (!obj)