[modules] Improve error messages.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 8030 matching lines @@
 Object* ModuleInfoEntry::export_name() const { return get(kExportNameIndex); }
 
 Object* ModuleInfoEntry::local_name() const { return get(kLocalNameIndex); }
 
 Object* ModuleInfoEntry::import_name() const { return get(kImportNameIndex); }
 
 Object* ModuleInfoEntry::module_request() const {
   return get(kModuleRequestIndex);
 }
 
+int ModuleInfoEntry::beg_pos() const {
+  return Smi::cast(get(kBegPosIndex))->value();
+}
+
+int ModuleInfoEntry::end_pos() const {
+  return Smi::cast(get(kEndPosIndex))->value();
+}
+
 FixedArray* ModuleInfo::module_requests() const {
   return FixedArray::cast(get(kModuleRequestsIndex));
 }
 
 FixedArray* ModuleInfo::special_exports() const {
   return FixedArray::cast(get(kSpecialExportsIndex));
 }
 
 FixedArray* ModuleInfo::regular_exports() const {
   return FixedArray::cast(get(kRegularExportsIndex));
@@ skipping 354 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_