Move sticky_error_ from isolate to thread

runtime/vm/longjump.cc

Index: runtime/vm/longjump.cc
diff --git a/runtime/vm/longjump.cc b/runtime/vm/longjump.cc
index 5820a472ea54299a8ff17f95ab9db0d71dcf2eb4..ef141c9b220c07d42e43f43e75d20fa5d51d278f 100644
--- a/runtime/vm/longjump.cc
+++ b/runtime/vm/longjump.cc
@@ -49,7 +49,6 @@ void LongJumpScope::Jump(int value, const Error& error) {
   ASSERT(IsSafeToJump());
 
   Thread* thread = Thread::Current();
-  Isolate* isolate = thread->isolate();
 
 #if defined(DEBUG)
 #define CHECK_REUSABLE_HANDLE(name)                                            \
@@ -59,7 +58,7 @@ REUSABLE_HANDLE_LIST(CHECK_REUSABLE_HANDLE)
 #endif  // defined(DEBUG)
 
   // Remember the error in the sticky error of this isolate.
-  isolate->object_store()->set_sticky_error(error);
+  thread->set_sticky_error(error);
 
   // Destruct all the active StackResource objects.
   StackResource::UnwindAbove(thread, top_);