Do not permit binding over catch parameters in for-of

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index effa562e2bc9d25862bd37e8d57ac6ae9f87ee57..9964e20d005e27d633989830116dba4b6983ae3f 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -1134,6 +1134,11 @@ class Parser : public ParserBase<ParserTraits> {
   // hoisted over such a scope.
   void CheckConflictingVarDeclarations(Scope* scope, bool* ok);
 
+  // Catch statements introduce some odd scoping constraints. You can't put a
+  // for-of statement that tries to bind to the same identifier as the
+  // CatchParameter, for example. (see B.3.5)
+  bool IsDeclaredAsCatchParameter(Scope* scope, const AstRawString* name);
+
   // Parser support
   VariableProxy* NewUnresolved(const AstRawString* name, VariableMode mode);
   Variable* Declare(Declaration* declaration,