From 52bd38f3bd89bbb4404183f768a17ccb38c50b47 Mon Sep 17 00:00:00 2001
From: Bob Nystrom <robert@stuffwithstuff.com>
Date: Sun, 4 Jan 2015 13:10:46 -0800
Subject: [PATCH] Don't double report lexer errors.

---
 src/wren_compiler.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/wren_compiler.c b/src/wren_compiler.c
index 58ab3033..92a7e5c9 100644
--- a/src/wren_compiler.c
+++ b/src/wren_compiler.c
@@ -291,6 +291,11 @@ static void error(Compiler* compiler, const char* format, ...)
   compiler->parser->hasError = true;
 
   Token* token = &compiler->parser->previous;
+
+  // If the parse error was caused by an error token, the lexer has already
+  // reported it.
+  if (token->type == TOKEN_ERROR) return;
+
   fprintf(stderr, "[%s line %d] Error on ",
           compiler->parser->sourcePath->value, token->line);