[kernel] Offsets on loops

pkg/kernel/lib/binary/ast_to_binary.dart

Index: pkg/kernel/lib/binary/ast_to_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_to_binary.dart b/pkg/kernel/lib/binary/ast_to_binary.dart
index 7b57e7bbcce4d2df1a5de82723e07bd0069da60f..f3d181eb68a1508333b49d90fba3f46025e08b4c 100644
--- a/pkg/kernel/lib/binary/ast_to_binary.dart
+++ b/pkg/kernel/lib/binary/ast_to_binary.dart
@@ -947,12 +947,14 @@ class BinaryPrinter extends Visitor {
 
   visitWhileStatement(WhileStatement node) {
     writeByte(Tag.WhileStatement);
+    writeOffset(node.fileOffset);
     writeNode(node.condition);
     writeNode(node.body);
   }
 
   visitDoStatement(DoStatement node) {
     writeByte(Tag.DoStatement);
+    writeOffset(node.fileOffset);
     writeNode(node.body);
     writeNode(node.condition);
   }
@@ -960,6 +962,7 @@ class BinaryPrinter extends Visitor {
   visitForStatement(ForStatement node) {
     _variableIndexer.pushScope();
     writeByte(Tag.ForStatement);
+    writeOffset(node.fileOffset);
     writeVariableDeclarationList(node.variables);
     writeOptionalNode(node.condition);
     writeNodeList(node.updates);
@@ -971,6 +974,7 @@ class BinaryPrinter extends Visitor {
     _variableIndexer.pushScope();
     writeByte(node.isAsync ? Tag.AsyncForInStatement : Tag.ForInStatement);
     writeOffset(node.fileOffset);
+    writeOffset(node.bodyOffset);
     writeVariableDeclaration(node.variable);
     writeNode(node.iterable);
     writeNode(node.body);