Function not declared in this scope

[torntrousers]

With Arduino IDE 1.6.8 and the 2.1.0 esp code this sketch fails to compile:

#include <ESP8266WiFi.h>
#include <PubSubClient.h>
WiFiClient wifiClient;
PubSubClient client("bla", 1883, callback, wifiClient);
void setup() {
}
void loop() {
}
void callback(char* topic, byte* payload, unsigned int payloadLength) {  
}

It gets a compile error saying: 'callback' was not declared in this scope
Is this supposed to be working now after #1472 was fixed?

[igrr]

This is an arduino-builder issue, it affects all cores (not only ESP8266): arduino/arduino-builder#85

[torntrousers]

Ah I see. Thanks.