Recently, I encountered a problem where an EXE file packaged with Python crashes during execution without any error messages, even though the code runs fine before packaging. By commenting out parts of the code step by step, I identified that the issue was related to the built-in Python library file yacc. However, since this is a library file, I was hesitant to modify it for fear of causing further issues. Nevertheless, it was clear that this file was causing the crash.
Ultimately, I discovered a useful method through research: during the EXE packaging process, omit the -w parameter to retain the black console window. This way, when the EXE runs, I can see the location of the problem in the black console. Following this method, the EXE file was able to execute normally without crashing. Upon checking the output in the black console, I found that it was printing warning messages from the yacc file. This made me realize that when the -w parameter is added, the black console is suppressed, and the output from the yacc file cannot be displayed, leading to the EXE crash.
Solution: Knowing the cause of the crash, I thought of two solutions. One was to comment out the code that outputs warning messages in the yacc file; the other was to redirect the warning message output to a file or software interface. Since the code already had redirection implemented, I opted for the second solution. After testing, both methods proved to be effective.