From 7eedcc708ed348312748ae66cbe5c938937a4dd4 Mon Sep 17 00:00:00 2001
From: Julien Pivotto <roidelapluie@inuits.eu>
Date: Thu, 16 Apr 2020 01:44:43 +0200
Subject: [PATCH] promql/parser: Cleanup generatedParserResult accross reuse

Reusing the same generatedParserResult ends up in strange panics:
See #7131 and #7127.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
---
 promql/parser/parse.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/promql/parser/parse.go b/promql/parser/parse.go
index 79424dd98d8..6e9bbe23a5c 100644
--- a/promql/parser/parse.go
+++ b/promql/parser/parse.go
@@ -169,6 +169,7 @@ func newParser(input string) *parser {
 
 	p.injecting = false
 	p.parseErrors = nil
+	p.generatedParserResult = nil
 
 	// Clear lexer struct before reusing.
 	p.lex = Lexer{