Scope-aware assignment aliases (extends the per-scope index):
- Resolve single-assignment aliases of dangerous callables in the call's own scope:
e = builtins.eval, im = importlib.import_module (and imp = __import__), and
l = pickle.loads (incl. aliased modules). Previously only bare-name and from-import
aliases were recognized.
- Count function parameters as local bindings so a parameter lexically shadows an
outer sink alias of the same name (fixes a false positive where def f(s): s(...)
with a module-level s = os.system flagged the parameter call).
Sensitive-read scanner:
- Resolve pathlib join receivers -- (Path('/etc') / 'passwd').read_text() and
Path('/etc').joinpath('passwd') -- not just a bare Path(...) constructor.
- Normalize path spellings (collapse redundant separators / '.' and resolve '..')
before the exact / dir checks, so /etc//passwd, /etc/./passwd and
/tmp/../etc/passwd are matched.
- Fold function-local single-assignment path constants (def f(): p = '/etc/passwd';
open(p)), not only module-level constants.
- Flag sys.modules.get('os') as the method-call twin of sys.modules['os'].
Runtime realpath backstop:
- Path.open coerces a str-subclass mode through the base str (matching the other open
wrappers) so a lying __contains__ cannot skip the write check.
- Path.rename/replace/link materialize the target once so a stateful __fspath__ cannot
return an in-workdir path for the check and an outside one for the real call (the
pre-3.11 accessor path where this wrapper is the only confinement).
Adds regression tests across the classifier, aliasing and runtime-backstop suites.
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