Getting value of local variables on stack trace

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
===================================================================
--- runtime/vm/raw_object.h	(revision 2970)
+++ runtime/vm/raw_object.h	(working copy)
@@ -660,7 +660,8 @@
   RAW_HEAP_OBJECT_IMPLEMENTATION(LocalVarDescriptors);
 
   struct VarInfo {
-    intptr_t index;      // Slot index on stack.
+    intptr_t index;      // Slot index on stack or in context.
+    intptr_t scope_id;   // Scope to which the variable belongs.
     intptr_t begin_pos;  // Token position of scope start.
     intptr_t end_pos;    // Token position of scope end.
   };