Bad free() in begin()

[Blake-Ballew]

Hi all,

I'm experiencing crashes attempting to initialize an LSM303AGR compass. This crash occurs during begin() and seems to be due to
an uninitialized pointer being deleted on line 71 of Adafruit_LSM303_Accel.cpp. begin() seems to work fine if i2c_dev is initialized to NULL.

Code:

    LSM303AGR()
    {
        #if DEBUG == 1
        Serial.println("Compass LSM303AGR::LSM303AGR: Initializing");
        #endif

        if (!_CompassMagnetometer.begin())
        {
            Serial.println("Compass LSM303AGR::LSM303AGR: Magnetometer not found");
        }

        #if DEBUG == 1
        Serial.println("_CompassMagnetometer Initialized");
        #endif

        if (!_CompassAccelerometer.begin())
        {
            Serial.println("Compass LSM303AGR::LSM303AGR: Accelerometer not found");
        }

        Serial.println("Compass LSM303AGR::LSM303AGR: Initialized");
    }

• Arduino board: ESP32-WROOM-32E(16MB)

• Arduino IDE version (found in Arduino -> About Arduino menu): arduino-esp32 2.0.16 in platformio

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too):

• Create Adafruit_LSM303_Accel_Unified object

• Program crashes upon accel.begin() for using a bad free().