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

src/debug/debug-scopes.cc

Index: src/debug/debug-scopes.cc
diff --git a/src/debug/debug-scopes.cc b/src/debug/debug-scopes.cc
index 8252154cb41cf645dddf1ce6c07b955310cadd7d..e8ef2403934dc06f795a989897c49fa10144d412 100644
--- a/src/debug/debug-scopes.cc
+++ b/src/debug/debug-scopes.cc
@@ -561,12 +561,10 @@ bool ScopeIterator::SetContextLocalValue(Handle<ScopeInfo> scope_info,
     Handle<String> next_name(scope_info->ContextLocalName(i));
     if (String::Equals(variable_name, next_name)) {
       VariableMode mode;
-      VariableLocation location;
       InitializationFlag init_flag;
       MaybeAssignedFlag maybe_assigned_flag;
-      int context_index =
-          ScopeInfo::ContextSlotIndex(scope_info, next_name, &mode, &location,
-                                      &init_flag, &maybe_assigned_flag);
+      int context_index = ScopeInfo::ContextSlotIndex(
+          scope_info, next_name, &mode, &init_flag, &maybe_assigned_flag);
       context->set(context_index, *new_value);
       return true;
     }