Add errors for declarations which conflict with catch parameters.

src/parsing/pattern-rewriter.cc

Index: src/parsing/pattern-rewriter.cc
diff --git a/src/parsing/pattern-rewriter.cc b/src/parsing/pattern-rewriter.cc
index 65715a8a321b7f767f100a4ea19ed097951c7768..be1824508b343393fa7f5e5d4da7d1540b83dec6 100644
--- a/src/parsing/pattern-rewriter.cc
+++ b/src/parsing/pattern-rewriter.cc
@@ -164,7 +164,7 @@ void Parser::PatternRewriter::VisitVariableProxy(VariableProxy* pattern) {
   Scope* declaration_scope = IsLexicalVariableMode(descriptor_->mode)
                                  ? descriptor_->scope
                                  : descriptor_->scope->DeclarationScope();
-  if (declaration_scope->num_var_or_const() > kMaxNumFunctionLocals) {
+  if (declaration_scope->num_var() > kMaxNumFunctionLocals) {
     parser_->ReportMessage(MessageTemplate::kTooManyVariables);
     *ok_ = false;
     return;