Preparse functions in the scope that was created when parsing of the function was started

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index f9d3fdefd0ff50581cbb47b03f92ee3e311cf6fc..b752d68abf82b40a10dfd56d4584936f3a03d8f1 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -806,6 +806,16 @@ class DeclarationScope : public Scope {
   void AllocateParameterLocals();
   void AllocateReceiver();
 
+  void ResetAfterPreparsing() {

[marja, 2016/09/26 12:38:27]

Why do we need this? Just by reading the code, it's unclear to me 1) is this
something that needs to be done for correctness or is it just cleaning up things
we don't need to save memory? 2) why does it clear exactly these things and not
some other things?

(Adding a comment here w/ the answer is welcome. :))

+    decls_.Clear();
+    has_rest_ = false;
+    inner_scope_ = nullptr;
+    locals_.Clear();
+    params_.Clear();
+    sloppy_block_function_map_.Clear();
+    variables_.Clear();
+  }
+
  private:
   void AllocateParameter(Variable* var, int index);