Error code formatting for windows returns Error message: Unknown error

[drew2a]

We use os.strerror(exit_code) to transform an error code into its string representation, as documented in https://docs.python.org/3/library/os.html#os.strerror

tribler/src/tribler/gui/core_manager.py

Lines 278 to 289 in 1c6baad

	def format_error_message(exit_code: int, exit_status: int) -> str:
	message = f"The Tribler core has unexpectedly finished with exit code {exit_code} and status: {exit_status}."
	if exit_code == 1:
	string_error = "Application error"
	else:
	try:
	string_error = os.strerror(exit_code)
	except ValueError:
	# On platforms where strerror() returns NULL when given an unknown error number, ValueError is raised.
	string_error = 'unknown error number'
	message += f'\n\nError message: {string_error}'
	return message

However, it seems not to work on Windows OS. As seen in #7855, the error code -1073741819 was transformed to Error message: Unknown error instead of something like Application Error 0xc0000005 (Access Violation).

[drew2a]

Possibly related:

• WinError(): Python int too large to convert to C long python/cpython#72660

[drew2a]

I've run out of ideas.

Here's what I've tried, besides the bare Win API call, which also does not work:

import ctypes
import os


def error_code_to_hex(error_code: int) -> str:
    """Convert a signed integer error code to a hexadecimal string."""
    v = error_code & 0xffffffff
    return hex(v)


def get_error_message(error_code: int):
    h = error_code_to_hex(error_code)
    print(f'\nError: {h}')
    print(f"\t{ctypes.FormatError(error_code)}")
    print(f"\t{ctypes.WinError(error_code)}")
    print(f'\t{os.strerror(error_code)}')


get_error_message(-1073741819)
get_error_message(-1073740940)
get_error_message(1)

Error: 0xc0000005
        <no description>
        [WinError -1073741819] <no description>
        Unknown error

Error: 0xc0000374
        <no description>
        [WinError -1073740940] <no description>
        Unknown error

Error: 0x1
        Incorrect function.
        [WinError 1] Incorrect function.
        Operation not permitted

Repositories attempting to achieve the same goal:

• https://github.com/buzzer-re/WinError
• https://github.com/kdschlosser/pyWinErrors
• https://github.com/tonkol77/winerrpy

[drew2a]

Fixed by:

• Reporting correct names for windows error codes #7885