Notify collector about lazily deoptimized code objects.

src/x64/deoptimizer-x64.cc

Index: src/x64/deoptimizer-x64.cc
diff --git a/src/x64/deoptimizer-x64.cc b/src/x64/deoptimizer-x64.cc
index 9e312ef3838f406f0443abb6fd8f6a760e0e53f5..0733602f1a9f063ac33c10e5942e8544b9b0f671 100644
--- a/src/x64/deoptimizer-x64.cc
+++ b/src/x64/deoptimizer-x64.cc
@@ -204,6 +204,11 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   node->set_next(data->deoptimizing_code_list_);
   data->deoptimizing_code_list_ = node;
 
+  // We might be in the middle of incremental marking with compaction.
+  // Tell collector to treat this code object in a special way and
+  // ignore all slots that might have been recorded on it.
+  isolate->heap()->mark_compact_collector()->InvalidateCode(code);
+
   // Set the code for the function to non-optimized version.
   function->ReplaceCode(function->shared()->code());