Reland: [modules] Properly initialize declared variables.

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index 4efccc8bb908089ea94957b8b6e798cb21da47ef..f2631ff4cc14fe0874d56bf38d1cb861182bee1f 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1078,6 +1078,7 @@ enum FunctionKind : uint16_t {
   kGetterFunction = 1 << 6,
   kSetterFunction = 1 << 7,
   kAsyncFunction = 1 << 8,
+  kModule = 1 << 9,
   kAccessorFunction = kGetterFunction | kSetterFunction,
   kDefaultBaseConstructor = kDefaultConstructor | kBaseConstructor,
   kDefaultSubclassConstructor = kDefaultConstructor | kSubclassConstructor,
@@ -1091,6 +1092,7 @@ inline bool IsValidFunctionKind(FunctionKind kind) {
   return kind == FunctionKind::kNormalFunction ||
          kind == FunctionKind::kArrowFunction ||
          kind == FunctionKind::kGeneratorFunction ||
+         kind == FunctionKind::kModule ||
          kind == FunctionKind::kConciseMethod ||
          kind == FunctionKind::kConciseGeneratorMethod ||
          kind == FunctionKind::kGetterFunction ||
@@ -1117,13 +1119,18 @@ inline bool IsGeneratorFunction(FunctionKind kind) {
   return kind & FunctionKind::kGeneratorFunction;
 }
 
+inline bool IsModule(FunctionKind kind) {
+  DCHECK(IsValidFunctionKind(kind));
+  return kind & FunctionKind::kModule;
+}
+
 inline bool IsAsyncFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kAsyncFunction;
 }
 
 inline bool IsResumableFunction(FunctionKind kind) {
-  return IsGeneratorFunction(kind) || IsAsyncFunction(kind);
+  return IsGeneratorFunction(kind) || IsAsyncFunction(kind) || IsModule(kind);
 }
 
 inline bool IsConciseMethod(FunctionKind kind) {