[kernel] Debugging of switch statement

runtime/vm/kernel_binary.cc

Index: runtime/vm/kernel_binary.cc
diff --git a/runtime/vm/kernel_binary.cc b/runtime/vm/kernel_binary.cc
index e88f261b9061f79aa0a0dbbb30cf41fee354af94..47d83bbb230c85b23ad39921e765aad9a2db72a5 100644
--- a/runtime/vm/kernel_binary.cc
+++ b/runtime/vm/kernel_binary.cc
@@ -1599,6 +1599,9 @@ SwitchStatement* SwitchStatement::ReadFrom(Reader* reader) {
 SwitchCase* SwitchCase::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   expressions_.ReadFromStatic<Expression>(reader);
+  for (intptr_t i = 0; i < expressions_.length(); ++i) {
+    expressions_[i]->set_position(reader->ReadPosition());
+  }
   is_default_ = reader->ReadBool();
   body_ = Statement::ReadFrom(reader);
   return this;