Do not look for the slot in the ScopeInfo's global range when it's not necessary.

src/debug/debug-frames.cc

Index: src/debug/debug-frames.cc
diff --git a/src/debug/debug-frames.cc b/src/debug/debug-frames.cc
index c0970a359f25e5c707aac1e939bbef328d062185..c4c288148c5c637d76011b30f5f4fc2f846c9248 100644
--- a/src/debug/debug-frames.cc
+++ b/src/debug/debug-frames.cc
@@ -180,11 +180,10 @@ void FrameInspector::UpdateStackLocalsFromMaterializedObject(
 bool FrameInspector::ParameterIsShadowedByContextLocal(
     Handle<ScopeInfo> info, Handle<String> parameter_name) {
   VariableMode mode;
-  VariableLocation location;
   InitializationFlag init_flag;
   MaybeAssignedFlag maybe_assigned_flag;
-  return ScopeInfo::ContextSlotIndex(info, parameter_name, &mode, &location,
-                                     &init_flag, &maybe_assigned_flag) != -1;
+  return ScopeInfo::ContextSlotIndex(info, parameter_name, &mode, &init_flag,
+                                     &maybe_assigned_flag) != -1;
 }