Hacky streaming of VariableGet

pkg/kernel/lib/binary/ast_from_binary.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library kernel.ast_from_binary;
 
 import 'dart:convert';
 import 'dart:typed_data';
 
 import '../ast.dart';
 import '../transformations/flags.dart';
@@ skipping 619 matching lines @@
         : (tagByte & Tag.SpecializedTagMask);
     switch (tag) {
       case Tag.LoadLibrary:
         return new LoadLibrary(readDeferredImportReference());
       case Tag.CheckLibraryIsLoaded:
         return new CheckLibraryIsLoaded(readDeferredImportReference());
       case Tag.InvalidExpression:
         return new InvalidExpression();
       case Tag.VariableGet:
         int offset = readOffset();
+        readUInt(); // offset in binary. Unused here.

[Kevin Millikin (Google), 2017/04/05 08:59:57]

// Offset of the declaration.

I think it's obvious that it's unused from the code.

         return new VariableGet(readVariableReference(), readDartTypeOption())
           ..fileOffset = offset;
       case Tag.SpecializedVariableGet:
         int index = tagByte & Tag.SpecializedPayloadMask;
         int offset = readOffset();
+        readUInt(); // offset in binary. Unused here.
         return new VariableGet(variableStack[index])..fileOffset = offset;
       case Tag.VariableSet:
         int offset = readOffset();
         return new VariableSet(readVariableReference(), readExpression())
           ..fileOffset = offset;
       case Tag.SpecializedVariableSet:
         int index = tagByte & Tag.SpecializedPayloadMask;
         int offset = readOffset();
         return new VariableSet(variableStack[index], readExpression())
           ..fileOffset = offset;
@@ skipping 464 matching lines @@
       ..fileOffset = offset
       ..fileEqualsOffset = fileEqualsOffset;
   }
 
   int readOffset() {
     // Offset is saved as unsigned,
     // but actually ranges from -1 and up (thus the -1)
     return readUInt() - 1;
   }
 }