A routine upgrade of Debian testing (where a few Python binaries were
upgraded, broke a formerly functional (command line) Sage. It now crashes
at startup :
charpent@p-202-021:~$ sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.5.beta2, Release Date: 2021-09-26 │
│ Using Python 3.9.8. Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable. ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
Traceback (most recent call last):
File "/usr/local/sage-9/src/bin/sage-ipython", line 15, in <module>
app.initialize()
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/application.py",
line 88, in inner
return method(app, *args, **kwargs)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/IPython/terminal/ipapp.py",
line 308, in initialize
super(TerminalIPythonApp, self).initialize(argv)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/application.py",
line 88, in inner
return method(app, *args, **kwargs)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/IPython/core/application.py",
line 450, in initialize
self.parse_command_line(argv)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/IPython/terminal/ipapp.py",
line 303, in parse_command_line
return super(TerminalIPythonApp, self).parse_command_line(argv)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/application.py",
line 88, in inner
return method(app, *args, **kwargs)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/application.py",
line 709, in parse_command_line
self.cli_config = deepcopy(loader.load_config())
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/loader.py",
line 851, in load_config
self._parse_args(argv)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/loader.py",
line 908, in _parse_args
self.parsed_data = self.parser.parse_args(to_parse)
File "/usr/lib/python3.9/argparse.py", line 1834, in parse_args
args, argv = self.parse_known_args(args, namespace)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/loader.py",
line 768, in parse_known_args
return super().parse_known_args(args, namespace)
File "/usr/lib/python3.9/argparse.py", line 1862, in parse_known_args
namespace, args = self._parse_known_args(args, namespace)
File "/usr/lib/python3.9/argparse.py", line 2076, in _parse_known_args
start_index = consume_optional(start_index)
File "/usr/lib/python3.9/argparse.py", line 2016, in consume_optional
take_action(action, args, option_string)
File "/usr/lib/python3.9/argparse.py", line 1944, in take_action
action(self, namespace, argument_values, option_string)
File
"/usr/local/sage-9/local/lib/python3.9/site-packages/traitlets/config/loader.py",
line 933, in __call__
namespace._flags.append(self.flag)
AttributeError: 'Namespace' object has no attribute '_flags'
Rebuilding Sage (make build) was unsuccessful.
However, using Sage via the Jupyter notebook still works.
Suggestions ?
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