If you're here for a quick solution, feel free to skip to Part 2. If you're interested in the debugging process I went through, keep reading!

Issue and Debugging Process​

When trying to play a virtual device, I encoutered error "The emulator process for AVD xxx has terminated".

To begin, I checked the Android Studio log to see what might be causing the issue. To locate the log, navigate to Android Studio > Help > Show Log in Explorer.

While working on a Python project, I encountered a bug related to list initialization that caused me some frustration. Here’s a breakdown of how I discovered the issue and solved it.

The Program​

Here’s a simple program I was working on to check if a 9x9 Sudoku board is valid:

def isValidSudoku(self, board: List[List[str]]) -> bool:
        rows = [0] * 9 
        columns = [0] * 9
        boxes = [[0] * 3] * 3

        for i in range(9):
            for j in range(9):
                if board[i][j] == '.': continue
                val  = int(board[i][j]) - 1

                if ((1 << val) & rows[i]):  
                    return False
                if ((1 << val) & columns[j]): 
                    return False
                if ((1 << val) & boxes[i//3][j//3]): 
                    return False

                rows[i] |= (1 << val)
                columns[j] |= (1 << val)
                boxes[i//3][j//3] |= (1 << val)
        
        return True

In this program, I use bitwise operations to track the values in each row, column, and 3x3 box on the Sudoku board. I initialize the rows and columns as 1D lists of bitmasks (using the [0] * 9 method), and the boxes variable is intended to store bitmasks for each 3x3 square in the board.

However, I ran into an unexpected problem.