From 7c36faa8854b59d6fe20c73f670e6fa8e1bc7835 Mon Sep 17 00:00:00 2001
From: Rafael Chacon <rafael@slack-corp.com>
Date: Tue, 15 Jan 2019 09:57:12 -0800
Subject: [PATCH] Adds a test to check regressions in parser

Signed-off-by: Rafael Chacon <rafael@slack-corp.com>
---
 tools/check_make_parser.sh | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/check_make_parser.sh b/tools/check_make_parser.sh
index 577b881dce6..139e18199a8 100755
--- a/tools/check_make_parser.sh
+++ b/tools/check_make_parser.sh
@@ -16,7 +16,15 @@ if ! cd go/vt/sqlparser/ ; then
 fi
 
 mv $CUR $TMP
-goyacc -o $CUR sql.y
+output=`goyacc -o $CUR sql.y`
+
+if [ -n "$output" ]; then
+    echo "Expected empty output from goyacc, got:"
+    echo $output
+    mv $TMP $CUR
+    exit 1
+fi
+
 gofmt -w $CUR
 
 if ! diff -q $CUR $TMP > /dev/null ; then