1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jsdate.cpp b/js/src/jsdate.cpp
index ccaeda2a3d..00a8abf848 100755
--- a/js/src/jsdate.cpp
+++ b/js/src/jsdate.cpp
@@ -354,10 +354,22 @@ MakeDate(double day, double time)
 JS_PUBLIC_API(double)
 JS::MakeDate(double year, unsigned month, unsigned day)
 {
+    MOZ_ASSERT(month <= 11);
+    MOZ_ASSERT(day >= 1 && day <= 31);
+
     return ::MakeDate(MakeDay(year, month, day), 0);
 }
 
 JS_PUBLIC_API(double)
+JS::MakeDate(double year, unsigned month, unsigned day, double time)
+{
+    MOZ_ASSERT(month <= 11);
+    MOZ_ASSERT(day >= 1 && day <= 31);
+
+    return ::MakeDate(MakeDay(year, month, day), time);
+}
+
+JS_PUBLIC_API(double)
 JS::YearFromTime(double time)
 {
     return ::YearFromTime(time);