[hoangchunghien]

Closes: #16457

stubtest failed on the stubsabot bump with 13 errors. flake8-bugbear 26.10.27 adds checks B045, B046, B047 and B049, and the names behind them:

• module constants EAGER_COMPREHENSION_NODES, B018_ARITHMETIC_OPERATORS, B018_LAZY_FUNCTIONS, B018_RAISING_BLOCKS, B046_DICT_TYPES, B049_DESCRIPTORS and B049_PROPERTY_ACCESSORS;
• BugBearVisitor.check_for_b045, check_for_b046, check_for_b047 and check_for_b049. check_for_b047 takes ast.Try | ast.TryStar, so it sits behind sys.version_info >= (3, 11) like the other TryStar methods in the stub;
• B008NamedExprFinder, a NamedExprFinder subclass with visit_GeneratorExp and visit_Lambda;
• a new imported_names: dict[str, str | None] | None = None parameter on FunctionDefDefaultsVisitor.__init__.

The types follow the upstream annotations and literals in bugbear.py 26.10.27. stubtest, mypy_test.py (3.10 and 3.14), pyright, black, ruff and flake8 pass locally.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉