From 2905694a1b00c5574f1418a7dbf8a22a7d247559 Mon Sep 17 00:00:00 2001
From: Gregory Oschwald <goschwald@maxmind.com>
Date: Wed, 29 May 2019 18:51:12 -0700
Subject: [PATCH] Add runtime.KeepAlive to verifier

This is to ensure that the finalizer does not run before verifications
finishes. Closes #55.
---
 verifier.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/verifier.go b/verifier.go
index ace9d35..45d25c8 100644
--- a/verifier.go
+++ b/verifier.go
@@ -1,6 +1,9 @@
 package maxminddb
 
-import "reflect"
+import (
+	"reflect"
+	"runtime"
+)
 
 type verifier struct {
 	reader *Reader
@@ -15,7 +18,9 @@ func (r *Reader) Verify() error {
 		return err
 	}
 
-	return v.verifyDatabase()
+	err := v.verifyDatabase()
+	runtime.KeepAlive(v.reader)
+	return err
 }
 
 func (v *verifier) verifyMetadata() error {