Transition ^= to |=

runtime/vm/debugger_api_impl.cc

Index: runtime/vm/debugger_api_impl.cc
===================================================================
--- runtime/vm/debugger_api_impl.cc	(revision 17302)
+++ runtime/vm/debugger_api_impl.cc	(working copy)
@@ -574,7 +574,7 @@
   Script& script = Script::Handle();
   String& url = String::Handle();
   for (int i = 0; i < num_scripts; i++) {
-    script ^= loaded_scripts.At(i);
+    script |= loaded_scripts.At(i);
     url = script.url();
     script_list.SetAt(i, url);
   }
@@ -595,7 +595,7 @@
   Library &lib = Library::Handle();
   const Array& library_id_list = Array::Handle(Array::New(num_libs));
   for (int i = 0; i < num_libs; i++) {
-    lib ^= libs.At(i);
+    lib |= libs.At(i);
     ASSERT(!lib.IsNull());
     ASSERT(Smi::IsValid(lib.index()));
     library_id_list.SetAt(i, Smi::Handle(Smi::New(lib.index())));
@@ -670,7 +670,7 @@
   String& lib_url = String::Handle();
   const Array& library_url_list = Array::Handle(Array::New(num_libs));
   for (int i = 0; i < num_libs; i++) {
-    lib ^= libs.At(i);
+    lib |= libs.At(i);
     ASSERT(!lib.IsNull());
     lib_url = lib.url();
     library_url_list.SetAt(i, lib_url);