From b405df3fab05b4addbe68fe1d46a8629c0e1b8cb Mon Sep 17 00:00:00 2001
From: zepatrik <zepatrik@users.noreply.github.com>
Date: Fri, 27 May 2022 16:52:35 +0200
Subject: [PATCH] fix: add lock to registering instrumented drivers

---
 connection_instrumented.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/connection_instrumented.go b/connection_instrumented.go
index 0118e848..435b50db 100644
--- a/connection_instrumented.go
+++ b/connection_instrumented.go
@@ -4,6 +4,7 @@ import (
 	"database/sql"
 	"database/sql/driver"
 	"fmt"
+	"sync"
 
 	mysqld "github.com/go-sql-driver/mysql"
 	"github.com/gobuffalo/pop/v6/logging"
@@ -14,6 +15,8 @@ import (
 
 const instrumentedDriverName = "instrumented-sql-driver"
 
+var sqlDriverLock = sync.Mutex{}
+
 func instrumentDriver(deets *ConnectionDetails, defaultDriverName string) (driverName, dialect string, err error) {
 	driverName = defaultDriverName
 	if deets.Driver != "" {
@@ -56,6 +59,9 @@ func instrumentDriver(deets *ConnectionDetails, defaultDriverName string) (drive
 		newDriverName = instrumentedDriverName + "-" + nameSQLite3
 	}
 
+	sqlDriverLock.Lock()
+	defer sqlDriverLock.Unlock()
+
 	var found bool
 	for _, n := range sql.Drivers() {
 		if n == newDriverName {