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[Docutils-develop] [docutils:bugs] #509 regression with docutils 0.22: unsupported operand type(s) for +: 'NoneType' and 'list'
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From: Günter M. <mi...@us...> - 2025-09-15 12:28:18
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Please try with [Docutils 0.22.1.rc1](https://pypi.org/project/docutils/0.22.1rc1/). --- **[bugs:#509] regression with docutils 0.22: unsupported operand type(s) for +: 'NoneType' and 'list'** **Status:** open-fixed **Created:** Wed Aug 06, 2025 06:13 PM UTC by Oliver Smith **Last Updated:** Sat Sep 06, 2025 10:56 AM UTC **Owner:** nobody Hello, after upgrading to docutils 0.22, building documentation for the pmbootstrap project fails: ~~~ Traceback (most recent call last): File "/usr/lib/python3.12/site-packages/sphinx/cmd/build.py", line 432, in build_main app.build(args.force_all, args.filenames) File "/usr/lib/python3.12/site-packages/sphinx/application.py", line 426, in build self.builder.build_update() File "/usr/lib/python3.12/site-packages/sphinx/builders/__init__.py", line 375, in build_update self.build( File "/usr/lib/python3.12/site-packages/sphinx/builders/__init__.py", line 403, in build updated_docnames = set(self.read()) ^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/sphinx/builders/__init__.py", line 519, in read self._read_serial(docnames) File "/usr/lib/python3.12/site-packages/sphinx/builders/__init__.py", line 584, in _read_serial self.read_doc(docname) File "/usr/lib/python3.12/site-packages/sphinx/builders/__init__.py", line 648, in read_doc publisher.publish() File "/usr/lib/python3.12/site-packages/docutils/core.py", line 269, in publish self.document = self.reader.read(self.source, self.parser, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/sphinx/io.py", line 103, in read self.parse() File "/usr/lib/python3.12/site-packages/docutils/readers/__init__.py", line 101, in parse self.parser.parse(self.input, document) File "/usr/lib/python3.12/site-packages/sphinx/parsers.py", line 86, in parse self.statemachine.run(inputlines, document, inliner=self.inliner) File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 165, in run results = StateMachineWS.run(self, input_lines, input_offset, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/statemachine.py", line 235, in run context, next_state, result = self.check_line( ^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/statemachine.py", line 447, in check_line return method(match, context, next_state) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 2354, in explicit_markup nodelist, blank_finish = self.explicit_construct(match) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 2366, in explicit_construct return method(self, expmatch) ^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 2103, in directive return self.run_directive( ^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 2153, in run_directive result = directive_instance.run() ^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/sphinxcontrib/autoprogram.py", line 262, in run nested_parse_with_titles(self.state, result, node) File "/usr/lib/python3.12/site-packages/sphinx/util/nodes.py", line 378, in nested_parse_with_titles ret = state.nested_parse(content, content_offset, node, match_titles=True) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 275, in nested_parse state_machine.run(block, input_offset, memo=self.memo, File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 191, in run results = StateMachineWS.run(self, input_lines, input_offset) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/statemachine.py", line 235, in run context, next_state, result = self.check_line( ^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/statemachine.py", line 447, in check_line return method(match, context, next_state) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 2787, in underline self.section(title, source, style, lineno - 1, messages) File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 321, in section self.new_subsection(title, lineno, messages) File "/usr/lib/python3.12/site-packages/docutils/parsers/rst/states.py", line 370, in new_subsection self.parent += section_node File "/usr/lib/python3.12/site-packages/docutils/nodes.py", line 736, in __radd__ return other + self.children ~~~~~~^~~~~~~~~~~~~~~ TypeError: unsupported operand type(s) for +: 'NoneType' and 'list' ~~~ Source code: https://gitlab.postmarketos.org/postmarketOS/pmbootstrap/ Tested with commit: 5927ff70b8d2468d5d0e2c978bc1fe30d036fd7f Distribution: Alpine Linux Edge --- Sent from sourceforge.net because doc...@li... is subscribed to https://sourceforge.net/p/docutils/bugs/ To unsubscribe from further messages, a project admin can change settings at https://sourceforge.net/p/docutils/admin/bugs/options. 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