Fix Type::Intersect to allocate large enough union.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 84dcb18248e113bad54db2d9dc60a403856e996c..a8e12c4a6412728df61aac4a759b067dd5c49072 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -2632,6 +2632,8 @@ static void ReplayEnvironmentNested(const ZoneList<HValue*>* values,
     HValue* value = values->at(i);
     if (value->IsCapturedObject()) {
       if (HCapturedObject::cast(value)->capture_id() == other->capture_id()) {
+        // TODO(jkummerow): This impertinently circumvents const-ness
+        // of |values|!
         values->at(i) = other;
       } else {
         ReplayEnvironmentNested(HCapturedObject::cast(value)->values(), other);