[modules] Disable Crankshaft for functions referencing module variables.

src/ast/ast-numbering.cc

Index: src/ast/ast-numbering.cc
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
index 158df6eb74553b240567192a23aa6a01570c2b92..9cbfd8535357eca4c07d34ab86d89b26a7e3c85d 100644
--- a/src/ast/ast-numbering.cc
+++ b/src/ast/ast-numbering.cc
@@ -147,8 +147,15 @@ void AstNumberingVisitor::VisitRegExpLiteral(RegExpLiteral* node) {
 
 void AstNumberingVisitor::VisitVariableProxyReference(VariableProxy* node) {
   IncrementNodeCount();
-  if (node->var()->IsLookupSlot()) {
-    DisableCrankshaft(kReferenceToAVariableWhichRequiresDynamicLookup);
+  switch (node->var()->location()) {
+    case VariableLocation::LOOKUP:
+      DisableCrankshaft(kReferenceToAVariableWhichRequiresDynamicLookup);
+      break;
+    case VariableLocation::MODULE:
+      DisableCrankshaft(kReferenceToModuleVariable);
+      break;
+    default:
+      break;
   }
   node->set_base_id(ReserveIdRange(VariableProxy::num_ids()));
 }