ESP32 Memory Leak?

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30 
void loop()
{
  webSocket.loop();

  char *currentBlock = nullptr; // Declare currentBlock outside the if block

  if (!gcodeQueue.empty())
  {
    bool okReceived = false;
    currentBlock = gcodeQueue.front();
    gcodeQueue.pop();
    len = strlen(currentBlock) + 1;
    Serial.println("  LEN: " + String(len));

    while (len >= RX_BUFFER_SIZE - 1 || Serial2.available())
    {
      char out_temp[RX_BUFFER_SIZE];
      Serial2.readBytesUntil('\n', out_temp, RX_BUFFER_SIZE);
      if (strstr(out_temp, "ok") == NULL && strstr(out_temp, "error") == NULL && strstr(out_temp, "[Pgm End]") == NULL)
      {
        Serial.println("    MSG: \"" + String(out_temp) + "\""); // Debug response
      }
      else
      {
        if (!okReceived && (strstr(out_temp, "ok") != NULL || strstr(out_temp, "[Pgm End]") != NULL))
        {
          okReceived = true;
          g_count += 1;
          len -= strlen(currentBlock) + 1;
          if (verbose)
            Serial.println("  REC<" + String(g_count) + ": \"" + String(out_temp) + "\"");
          // If [Pgm End] is received, send "PE" over the websocket
          if (strstr(out_temp, "[Pgm End]") != NULL)
          {
            Serial.println("Program End");
            webSocket.broadcastTXT("PE");
          }
        }
        if (strstr(out_temp, "error") != NULL)
          error_count += 1;
      }
    }
    // Append newline character to currentBlock
    char currentBlockWithNewline[strlen(currentBlock) + 2];
    strcpy(currentBlockWithNewline, currentBlock);
    strcat(currentBlockWithNewline, "\n");

    // Convert currentBlockWithNewline to byte array and send it
    Serial2.write((const uint8_t *)currentBlockWithNewline, strlen(currentBlockWithNewline));
    if (verbose)
      Serial.println("SND>" + String(l_count) + ": \"" + String(currentBlock) + "\"");
    l_count += 1;

    // Yield to allow the ESP32 to handle the WebSocket events
    yield();
  }

  // Wait until all responses have been received.
  while (l_count > g_count)
  {
    bool okReceived = false;
    char out_temp[RX_BUFFER_SIZE];
    Serial2.readBytesUntil('\n', out_temp, RX_BUFFER_SIZE);
    if (strstr(out_temp, "ok") == NULL && strstr(out_temp, "error") == NULL && strstr(out_temp, "[Pgm End]") == NULL)
    {
      Serial.println("    MSG: \"" + String(out_temp) + "\""); // Debug response
    }
    else
    {
      if (!okReceived && (strstr(out_temp, "ok") != NULL || strstr(out_temp, "[Pgm End]") != NULL))
      {
        okReceived = true;
        g_count += 1;
        len -= strlen(currentBlock) + 1;
        if (verbose)
          Serial.println("  REC<" + String(g_count) + ": \"" + String(out_temp) + "\"");

        // If [Pgm End] is received, send "PE" over the websocket
        if (strstr(out_temp, "[Pgm End]") != NULL)
        {
          Serial.println("Program End");
          webSocket.broadcastTXT("PE");
        }
      }
      if (strstr(out_temp, "error") != NULL)
        error_count += 1;
    }
    // Yield to allow the ESP32 to handle the WebSocket events
    yield();
  }
  if (currentBlock != nullptr)
  {
    delete[] (currentBlock);
    currentBlock = nullptr;
  }
}

Also das was mir wirklich etwas gebracht hat ist delete[] (currentBlock); ich habe hier eine liste:

Free Heap Size about 172000

No Optimization (Delete)

20 Chars (A) - After first time Heap Size: 106528

20 Chars (A) - After second time Heap Size: 78076

20 Chars (A) - After third time Heap Size: Crash

With Optimization (Delete)

20 Chars (A) - After first time Heap Size: 106484

20 Chars (A) - After second time Heap Size: 106484

20 Chars (A) - After third time Heap Size: 106032