Hello,
Every time I start sage math it quits with an error message. I have tried
rebooting and reinstalling; It still produces the same result. Error log is
attached
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***************************************************************************
IPython post-mortem report
{'commit_hash': '4d6a64ace',
'commit_source': 'installation',
'default_encoding': 'utf-8',
'ipython_path': '/usr/lib/python3.13/site-packages/IPython',
'ipython_version': '9.7.0',
'os_name': 'posix',
'platform': 'Linux-6.17.7-3-cachyos-x86_64-with-glibc2.42',
'sys_executable': '/usr/bin/python',
'sys_platform': 'linux',
'sys_version': '3.13.7 (main, Sep 9 2025, 16:20:24) [GCC 15.2.1 20250813]'}
***************************************************************************
Application name: Sage
Current user configuration structure:
{'IPCompleter': {'use_jedi': False},
'InteractiveShell': {'ast_node_interactivity': 'all',
'colors': 'neutral',
'confirm_exit': False,
'prompts_class': <class 'sage.repl.prompts.SagePrompts'>,
'separate_in': '',
'simple_prompt': False,
'term_title': True},
'InteractiveShellApp': {'extensions': ['sage']},
'TerminalIPythonApp': {'display_banner': False,
'shell_class': <class
'sage.repl.interpreter.SageTerminalInteractiveShell'>,
'test_shell': False,
'verbose_crash': True},
'TerminalInteractiveShell': {'ast_node_interactivity': 'all',
'colors': 'neutral',
'confirm_exit': False,
'prompts_class': <class
'sage.repl.prompts.SagePrompts'>,
'separate_in': '',
'simple_prompt': False,
'term_title': True}}
***************************************************************************
Crash traceback:
---------------------------------------------------------------------------
---------------------------------------------------------------------------
ImportError Python 3.13.7: /usr/bin/python
Thu Nov 6 13:00:33 2025
A problem occurred executing Python code. Here is the sequence of function
calls leading up to the error, with the most recent (innermost) call last.
File /usr/bin/sage:8
1 #!/usr/bin/python
2 # -*- coding: utf-8 -*-
3 import re
4 import sys
5 from sage.cli import main
6 if __name__ == "__main__":
7 sys.argv[0] = re.sub(r"(-script\.pyw|\.exe)?$", "", sys.argv[0])
----> 8 sys.exit(main())
File /usr/lib/python3.13/site-packages/sage/cli/__init__.py:48, in main()
15 def main() -> int:
16 input_args = sys.argv[1:]
17 parser = argparse.ArgumentParser(
18 prog="sage",
19 description="If no command is given, starts the interactive
interpreter where you can enter statements and expressions, immediately execute
them and see their results.",
20 )
21 parser.add_argument(
22 "-v",
23 "--verbose",
(...) 26 help="print additional information",
27 )
28 parser.add_argument(
29 "-q",
30 "--quiet",
(...) 33 help="do not display the banner",
34 )
35 parser.add_argument(
36 "--simple-prompt",
37 action="store_true",
38 default=False,
39 help="use simple prompt IPython mode",
40 )
42 VersionCmd.extend_parser(parser)
43 JupyterNotebookCmd.extend_parser(parser)
44 EvalCmd.extend_parser(parser)
45 RunFileCmd.extend_parser(parser)
47 if not input_args:
---> 48 return InteractiveShellCmd(CliOptions()).run()
50 args = parser.parse_args(input_args)
51 options = CliOptions(**vars(args))
53 logging.basicConfig(level=logging.DEBUG if options.verbose else
logging.INFO)
55 if args.file:
56 return RunFileCmd(options).run()
57 elif args.command:
58 return EvalCmd(options).run()
59 elif args.notebook:
60 return JupyterNotebookCmd(options).run()
61 return InteractiveShellCmd(options).run()
File /usr/lib/python3.13/site-packages/sage/cli/interactive_shell_cmd.py:27, in
InteractiveShellCmd.run(self=<sage.cli.interactive_shell_cmd.InteractiveShellCmd
object>)
11 def run(self) -> int:
12 r"""
13 Start the interactive shell.
14 """
15 # Display startup banner. Do this before anything else to give the
user
16 # early feedback that Sage is starting.
17 if not self.options.quiet:
18 from sage.misc.banner import banner
19 banner()
21 from sage.repl.interpreter import SageTerminalApp
23 app = SageTerminalApp.instance()
24 if self.options.simple_prompt:
25 app.config['InteractiveShell']['simple_prompt'] = True
26 app.config['InteractiveShell']['colors'] = 'nocolor'
---> 27 app.initialize([])
app = <sage.repl.interpreter.SageTerminalApp object at 0x7f2d462e5010>
28 return app.start() # type: ignore
File /usr/lib/python3.13/site-packages/traitlets/config/application.py:118, in
catch_config_error.<locals>.inner(app=<sage.repl.interpreter.SageTerminalApp
object>, *args=([],), **kwargs={})
115 @functools.wraps(method)
116 def inner(app: Application, *args: t.Any, **kwargs: t.Any) -> t.Any:
117 try:
--> 118 return method(app, *args, **kwargs)
method = <function TerminalIPythonApp.initialize at 0x7f2d4511c7c0>
app = <sage.repl.interpreter.SageTerminalApp object at 0x7f2d462e5010>
args = ([],)
kwargs = {} 119 except (TraitError, ArgumentError) as e:
120 app.log.fatal("Bad config encountered during initialization:
%s", e)
121 app.log.debug("Config at the time: %s", app.config)
122 app.exit(1)
File /usr/lib/python3.13/site-packages/IPython/terminal/ipapp.py:286, in
TerminalIPythonApp.initialize(self=<sage.repl.interpreter.SageTerminalApp
object>, argv=[])
274 @catch_config_error
275 def initialize(self, argv=None):
276 """Do actions after construct, but before starting the app."""
277 super(TerminalIPythonApp, self).initialize(argv)
278 if self.subapp is not None:
279 # don't bother initializing further, starting subapp
280 return
281 # print(self.extra_args)
282 if self.extra_args and not self.something_to_run:
283 self.file_to_run = self.extra_args[0]
284 self.init_path()
285 # create the shell
--> 286 self.init_shell()
self = <sage.repl.interpreter.SageTerminalApp object at 0x7f2d462e5010>
287 # and draw the banner
288 self.init_banner()
289 # Now a variety of things that happen after the banner is printed.
290 self.init_gui_pylab()
291 self.init_extensions()
292 self.init_code()
File /usr/lib/python3.13/site-packages/sage/repl/interpreter.py:832, in
SageTerminalApp.init_shell(self=<sage.repl.interpreter.SageTerminalApp object>)
815 def init_shell(self):
816 r"""
817 Initialize the :class:`SageInteractiveShell` instance.
818
(...) 829 <sage.repl.interpreter.SageTestShell object at 0x...>
830 """
831 # Shell initialization
--> 832 self.shell = self.shell_class.instance(
self = <sage.repl.interpreter.SageTerminalApp object at 0x7f2d462e5010>
833 parent=self,
834 config=self.config,
835 profile_dir=self.profile_dir,
836 ipython_dir=self.ipython_dir)
837 self.shell.configurables.append(self)
838 self.shell.has_sage_extensions = SAGE_EXTENSION in self.extensions
840 # Load the %lprun extension if available
841 try:
842 import line_profiler
843 assert line_profiler # silence pyflakes
844 except ImportError:
845 pass
846 else:
847 self.extensions.append('line_profiler')
849 if self.shell.has_sage_extensions:
850 self.extensions.remove(SAGE_EXTENSION)
852 # load sage extension here to get a crash if
853 # something is wrong with the sage library
854 self.shell.extension_manager.load_extension(SAGE_EXTENSION)
File /usr/lib/python3.13/site-packages/traitlets/config/configurable.py:583, in
SingletonConfigurable.instance(cls=<class
'sage.repl.interpreter.SageTerminalInteractiveShell'>, *args=(),
**kwargs={'config': {'TerminalIPythonApp': {'display_banner': False,...':
['sage']}, 'IPCompleter': {'use_jedi': False}}, 'ipython_dir':
'/home/brandon/.ipython', 'parent': <sage.repl.interpreter.SageTerminalApp
object>, 'profile_dir': <IPython.core.profiledir.ProfileDir object>})
553 @classmethod
554 def instance(cls: type[CT], *args: t.Any, **kwargs: t.Any) -> CT:
555 """Returns a global instance of this class.
556
557 This method create a new instance if none have previously been
created
(...) 579 True
580 """
581 # Create and save the instance
582 if cls._instance is None:
--> 583 inst = cls(*args, **kwargs)
cls = <class 'sage.repl.interpreter.SageTerminalInteractiveShell'>
args = ()
kwargs = {'parent': <sage.repl.interpreter.SageTerminalApp object at
0x7f2d462e5010>, 'config': {'TerminalIPythonApp': {'display_banner': False,
'verbose_crash': True, 'test_shell': False, 'shell_class': <class
'sage.repl.interpreter.SageTerminalInteractiveShell'>}, 'InteractiveShell':
{'prompts_class': <class 'sage.repl.prompts.SagePrompts'>,
'ast_node_interactivity': 'all', 'colors': 'neutral', 'simple_prompt': False,
'term_title': True, 'confirm_exit': False, 'separate_in': ''},
'TerminalInteractiveShell': {'prompts_class': <class
'sage.repl.prompts.SagePrompts'>, 'ast_node_interactivity': 'all', 'colors':
'neutral', 'simple_prompt': False, 'term_title': True, 'confirm_exit': False,
'separate_in': ''}, 'InteractiveShellApp': {'extensions': ['sage']},
'IPCompleter': {'use_jedi': False}}, 'profile_dir':
<IPython.core.profiledir.ProfileDir object at 0x7f2d451356a0>, 'ipython_dir':
'/home/brandon/.ipython'} 584 # Now make sure that the instance will
also be returned by
585 # parent classes' _instance attribute.
586 for subclass in cls._walk_mro():
587 subclass._instance = inst
589 if isinstance(cls._instance, cls):
590 return cls._instance
591 else:
592 raise MultipleInstanceError(
593 f"An incompatible sibling of '{cls.__name__}' is already
instantiated"
594 f" as singleton: {type(cls._instance).__name__}"
595 )
File
/usr/lib/python3.13/site-packages/IPython/terminal/interactiveshell.py:984, in
TerminalInteractiveShell.__init__(self=<sage.repl.interpreter.SageTerminalInteractiveShell
object>, *args=(), **kwargs={'config': {'TerminalIPythonApp':
{'display_banner': False,...': ['sage']}, 'IPCompleter': {'use_jedi': False}},
'ipython_dir': '/home/brandon/.ipython', 'parent':
<sage.repl.interpreter.SageTerminalApp object>, 'profile_dir':
<IPython.core.profiledir.ProfileDir object>})
983 def __init__(self, *args, **kwargs) -> None:
--> 984 super().__init__(*args, **kwargs)
args = ()
kwargs = {'parent': <sage.repl.interpreter.SageTerminalApp object at
0x7f2d462e5010>, 'config': {'TerminalIPythonApp': {'display_banner': False,
'verbose_crash': True, 'test_shell': False, 'shell_class': <class
'sage.repl.interpreter.SageTerminalInteractiveShell'>}, 'InteractiveShell':
{'prompts_class': <class 'sage.repl.prompts.SagePrompts'>,
'ast_node_interactivity': 'all', 'colors': 'neutral', 'simple_prompt': False,
'term_title': True, 'confirm_exit': False, 'separate_in': ''},
'TerminalInteractiveShell': {'prompts_class': <class
'sage.repl.prompts.SagePrompts'>, 'ast_node_interactivity': 'all', 'colors':
'neutral', 'simple_prompt': False, 'term_title': True, 'confirm_exit': False,
'separate_in': ''}, 'InteractiveShellApp': {'extensions': ['sage']},
'IPCompleter': {'use_jedi': False}}, 'profile_dir':
<IPython.core.profiledir.ProfileDir object at 0x7f2d451356a0>, 'ipython_dir':
'/home/brandon/.ipython'} 985
self._set_autosuggestions(self.autosuggestions_provider)
986 self.init_prompt_toolkit_cli()
987 self.init_term_title()
988 self.keep_running = True
989 self._set_formatter(self.autoformatter)
File /usr/lib/python3.13/site-packages/IPython/core/interactiveshell.py:664, in
InteractiveShell.__init__(self=<sage.repl.interpreter.SageTerminalInteractiveShell
object>, ipython_dir='/home/brandon/.ipython',
profile_dir=<IPython.core.profiledir.ProfileDir object>, user_module=None,
user_ns=None, custom_exceptions=((), None), **kwargs={'config':
{'TerminalIPythonApp': {'display_banner': False,...': ['sage']}, 'IPCompleter':
{'use_jedi': False}}, 'parent': <sage.repl.interpreter.SageTerminalApp object>})
645 self.init_prefilter()
647 self.init_syntax_highlighting()
648 self.init_hooks()
649 self.init_events()
650 self.init_pushd_popd_magic()
651 self.init_user_ns()
652 self.init_logger()
653 self.init_builtins()
655 # The following was in post_config_initialization
656 self.raw_input_original = input
657 self.init_completer()
658 # TODO: init_io() needs to happen before init_traceback handlers
659 # because the traceback handlers hardcode the stdout/stderr streams.
660 # This logic in in debugger.Pdb and should eventually be changed.
661 self.init_io()
662 self.init_traceback_handlers(custom_exceptions)
663 self.init_prompts()
--> 664 self.init_display_formatter()
self = <sage.repl.interpreter.SageTerminalInteractiveShell object at
0x7f2d451357f0> 665 self.init_display_pub()
666 self.init_data_pub()
667 self.init_displayhook()
668 self.init_magics()
669 self.init_alias()
670 self.init_logstart()
671 self.init_pdb()
672 self.init_extension_manager()
673 self.init_payload()
674 self.events.trigger('shell_initialized', self)
675 atexit.register(self.atexit_operations)
677 # The trio runner is used for running Trio in the foreground thread. It
678 # is different from `_trio_runner(async_fn)` in `async_helpers.py`
679 # which calls `trio.run()` for every cell. This runner runs all cells
680 # inside a single Trio event loop. If used, it is set from
681 # `ipykernel.kernelapp`.
682 self.trio_runner = None
683 self.showing_traceback = False
File /usr/lib/python3.13/site-packages/sage/repl/interpreter.py:300, in
SageTerminalInteractiveShell.init_display_formatter(self=<sage.repl.interpreter.SageTerminalInteractiveShell
object>)
289 def init_display_formatter(self):
290 """
291 Switch to the Sage IPython commandline rich output backend.
292
(...) 296 sage:
SageTerminalInteractiveShell().init_display_formatter() # not tested
297 """
298 from sage.repl.rich_output.backend_ipython import
BackendIPythonCommandline
299 backend = BackendIPythonCommandline()
--> 300 backend.get_display_manager().switch_backend(backend, shell=self)
backend = IPython command line
self = <sage.repl.interpreter.SageTerminalInteractiveShell object at
0x7f2d451357f0>
File
/usr/lib/python3.13/site-packages/sage/repl/rich_output/display_manager.py:321,
in DisplayManager.switch_backend(self=The Sage display manager using the
IPython command line backend, backend=IPython command line, **kwds={'shell':
<sage.repl.interpreter.SageTerminalInteractiveShell object>})
305 if not any(issubclass(out, OutputPlainText) for out in supported):
306 raise ValueError('every backend must support plain text')
307 try:
308 self._backend.uninstall()
309 except AttributeError:
310 pass # first time we switch
311 # clear caches
312 self._output_promotions = dict()
313 self._supported_output = frozenset(
314 map(self._demote_output_class, backend.supported_output()))
315 # install new backend
316 try:
317 old_backend = self._backend
318 except AttributeError:
319 old_backend = None
320 self._backend = backend
--> 321 self._backend.install(**kwds)
self._backend = IPython command line
self = The Sage display manager using the IPython command line backend
kwds = {'shell': <sage.repl.interpreter.SageTerminalInteractiveShell
object at 0x7f2d451357f0>} 322 self._preferences =
DisplayPreferences(self._backend.default_preferences())
323 return old_backend
File
/usr/lib/python3.13/site-packages/sage/repl/rich_output/backend_ipython.py:60,
in BackendIPython.install(self=IPython command line, **kwds={'shell':
<sage.repl.interpreter.SageTerminalInteractiveShell object>})
38 def install(self, **kwds):
39 """
40 Switch the Sage rich output to the IPython backend.
41
(...) 57 2
58 """
59 shell = kwds['shell']
---> 60 from sage.repl.display.formatter import SageDisplayFormatter
61 shell.display_formatter = SageDisplayFormatter(parent=shell)
62 shell.configurables.append(shell.display_formatter)
File /usr/lib/python3.13/site-packages/sage/repl/display/formatter.py:66
1 # sage_setup: distribution = sagemath-repl
2 r"""
3 IPython Displayhook Formatters
4
(...) 51 :class:`~sage.typeset.ascii_art.AsciiArt` object (see and
52 :meth:`sage.structure.sage_object.SageObject._ascii_art_`). """
54 #
****************************************************************************
55 # Copyright (C) 2014 Volker Braun <[email protected]>
56 #
(...) 60 # https://www.gnu.org/licenses/
61 #
****************************************************************************
63 from io import StringIO
65 from IPython.core.formatters import DisplayFormatter, PlainTextFormatter
---> 66 from IPython.utils.py3compat import unicode_to_str
67 from IPython.core.display import DisplayObject
69 from ipywidgets import Widget
71 from sage.repl.display.pretty_print import SagePrettyPrinter
72 from sage.misc.lazy_import import lazy_import
74 IPYTHON_NATIVE_TYPES = (DisplayObject, Widget)
76 PLAIN_TEXT = 'text/plain'
77 TEXT_LATEX = 'text/latex'
78 TEXT_HTML = 'text/html'
80 lazy_import('matplotlib.figure', 'Figure')
83 class SageDisplayFormatter(DisplayFormatter):
85 def __init__(self, *args, **kwds):
86 """
87 This is where the Sage rich objects are translated to IPython.
88
(...) 100 RuntimeError: check failed: current backend is
invalid
101 """
102 super().__init__(*args, **kwds)
103 from sage.repl.rich_output.display_manager import
get_display_manager
104 self.dm = get_display_manager()
ImportError: cannot import name 'unicode_to_str' from 'IPython.utils.py3compat'
(/usr/lib/python3.13/site-packages/IPython/utils/py3compat.py)
***************************************************************************
History of session input:
