WiFi memory leak after disconnect (caused by log_d) ?

[kasskas]

Hardware:

Board: ESP32-WROOM
Core Installation/update date: 2018 Sep
IDE name: Arduino IDE
Flash Frequency: 80Mhz
PSRAM enabled: no
Upload Speed: 115200
Computer OS: Windows 10?

Description:

Every time WiFi client connects and disconnects, free memory in heap is reduced. After some time this causes a crash of the MCU. The issue happens using WiFiCLientBasic example code. Building without debug output seems to solve the issue. Could there be a possible leak in log_d output?
After some test with none debug out, it seems that log_d in WiFi begins leaks memory. Is there any known fixes ?

Sketch:

#include <WiFi.h>
#include <esp_wifi.h>

const char* ssid = "ssid";
const char* password = "pass";

void setup() {
	Serial.begin(115200);
	WiFi.begin(ssid, password);

	while (WiFi.status() != WL_CONNECTED) {
		delay(500);
		Serial.println("Connecting to WiFi..");
	}
	Serial.println("WiFi connected");
	Serial.println("IP address: ");
	Serial.println(WiFi.localIP());
	WiFi.disconnect(true);
	delay(500);
}

void loop() {

	WiFi.begin();
	/*while (WiFi.status() != WL_CONNECTED)
		;*/
	delay(10000);
	WiFi.disconnect(true);

	//Serial.print("after:  ");
	Serial.println(xPortGetFreeHeapSize());
	delay(10000);
}

Debug Messages:

With log_d output

[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 2 - STA_START
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 4 - STA_CONNECTED
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 7 - STA_GOT_IP
[D][WiFiGeneric.cpp:386] _eventCallback(): STA IP: 192.168.1.103, MASK: 255.255.255.0, GW: 192.168.1.1
after:  234380
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 3 - STA_STOP
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 3 - STA_STOP
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 0 - WIFI_READY
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 2 - STA_START
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 4 - STA_CONNECTED
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 7 - STA_GOT_IP
[D][WiFiGeneric.cpp:386] _eventCallback(): STA IP: 192.168.1.103, MASK: 255.255.255.0, GW: 192.168.1.1
after:  234216

Without log_d output:

235248
235380
235384
235384
235240
235240
235236
235236
235384
235384
235384
235236
235236
235236
235236
235384
235380
235380
235236
235236
235220
235236
235384
235384
235384
235236
235236
235236
235236

[felixstorm]

[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 7 - STA_GOT_IP has exactly 64 characters, so the leak is most likely caused by an issue in log_printf: #2232

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This stale issue has been automatically closed. Thank you for your contributions.