[kernel] Debugging of switch statement

pkg/kernel/lib/binary/ast_from_binary.dart

Index: pkg/kernel/lib/binary/ast_from_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_from_binary.dart b/pkg/kernel/lib/binary/ast_from_binary.dart
index b867b61b35cefa2182d766ee8e374c9fa683ed78..8a3dac0ed7dd77b39d88f11f160faa9a1f4b0b6a 100644
--- a/pkg/kernel/lib/binary/ast_from_binary.dart
+++ b/pkg/kernel/lib/binary/ast_from_binary.dart
@@ -910,6 +910,10 @@ class BinaryBuilder {
         for (int i = 0; i < cases.length; ++i) {
           var caseNode = cases[i];
           _fillTreeNodeList(caseNode.expressions, readExpression, caseNode);
+          caseNode.expressionOffsets.length = caseNode.expressions.length;
+          for (int i = 0; i < caseNode.expressionOffsets.length; ++i) {
+            caseNode.expressionOffsets[i] = readOffset();
+          }
           caseNode.isDefault = readByte() == 1;
           caseNode.body = readStatement()..parent = caseNode;
         }