When using sudo command in Ubuntu, the stderr is somehow processed by the test-driver which expects only base64 encoded stdout.
Running the following command in Ubuntu vm using nix-vm-test:
vm.execute("sudo bash -c \"echo 'Created foo → bar.\n' >&2 && echo 'foo' \"")Results in error message:
Traceback (most recent call last):
File "/nix/store/0l539chjmcq5kdd43j6dgdjky4sjl7hl-python3-3.12.8/lib/python3.12/base64.py", line 37, in _bytes_from_decode_data
return s.encode('ascii')
additionally exposed symbols:
^^^^^^^^^^^^^^^^^
UnicodeEncodeError: 'ascii' codec can't encode character '\u2192' in position 12: ordinal not in range(128)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/nix/store/ahpc056hlclhnv4qrdlfb525pk3shnxw-nixos-test-driver-1.1/bin/.nixos-test-driver-wrapped", line 9, in <module>
sys.exit(main())
^^^^^^
File "/nix/store/ahpc056hlclhnv4qrdlfb525pk3shnxw-nixos-test-driver-1.1/lib/python3.12/site-packages/test_driver/__init__.py", line 146, in main
driver.run_tests()
File "/nix/store/ahpc056hlclhnv4qrdlfb525pk3shnxw-nixos-test-driver-1.1/lib/python3.12/site-packages/test_driver/driver.py", line 174, in run_tests
vm,
self.test_script()
File "/nix/store/ahpc056hlclhnv4qrdlfb525pk3shnxw-nixos-test-driver-1.1/lib/python3.12/site-packages/test_driver/driver.py", line 166, in test_script
exec(self.tests, symbols, None)
File "<string>", line 2, in <module>
File "/nix/store/ahpc056hlclhnv4qrdlfb525pk3shnxw-nixos-test-driver-1.1/lib/python3.12/site-packages/test_driver/machine.py", line 588, in execute
output = base64.b64decode(self._next_newline_closed_block_from_shell())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/0l539chjmcq5kdd43j6dgdjky4sjl7hl-python3-3.12.8/lib/python3.12/base64.py", line 83, in b64decode
s = _bytes_from_decode_data(s)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/0l539chjmcq5kdd43j6dgdjky4sjl7hl-python3-3.12.8/lib/python3.12/base64.py", line 39, in _bytes_from_decode_data
raise ValueError('string argument should contain only ASCII characters')
ValueError: string argument should contain only ASCII characters
vlan1,
start_all, test_script, machines, vlans, driver, log, os, create_machine, subtest, run_tests, join_all, retry, serial_stdout_off, serial_stdout_on, polling_condition, Machine
Run the test locally:
nix -L build github:am-on/nix-test-driver-ubuntu-bug