Crash when try launch high load test

Hello,

I have a crash when I try to make a test for high load.
I call ab -c 50 -n 10000 -f TLS1.2 -H "Accept-Encoding: gzip,deflate" http://127.0.0.1:8181/activities
in a command line and I have the crash in
PerfectMySQL->MySQLStmt.swift->line 218 let r = mysql_stmt_execute(ptr)
Crash is Thread 2: signal SIGABRT

I use Mac OS Majove,
Swift 4.2
PerfectMySQL 3.3.0

Maybe I wrong setup connect to a database?

part of my code:

//Connection to database
mySQL = MySQL()
let isConnected = mySQL.connect(host: testHost, user: testUser, password: testPassword, db: nil, port: testPort, socket: nil, flag: 0)
db = Database(configuration: MySQLDatabaseConfiguration(connection: mySQL))

//Code from handler
let result = try db.table(Activity.self).order(by: \Activity.updatedAt).limit(count, skip: from).select()
let activities: [[String: Any]] = result.map{
     $0.toJson()
}
let responseString = JSON(activities).rawString() ?? "[]"
response.appendBody(string: responseString).completed(status: .ok)

So the code is very simple. just select items from the database.

Start by reproducing the reported ab -c 50 -n 10000 request against the /activities handler, then inspect PerfectMySQL's MySQLStmt.swift at line 218 alongside the connection setup. Done means the high-load request no longer aborts at mysql_stmt_execute, with the cause and verification documented.