RecursionError in InterestingOrigin.from_exception with recursive __context__

[jakkdl]

def test_recursive_exception():
    @given(st.data())
    def test_function(data):
        try:
            raise ExceptionGroup("", [ValueError()])
        except ExceptionGroup as eg:
            raise eg.exceptions[0] from None
    test_function()

causes an infinite recursion in InterestingOrigin.from_exception

hypothesis/hypothesis-python/src/hypothesis/internal/escalation.py

Lines 110 to 127 in 879225d

	def from_exception(cls, exception: BaseException, /) -> "InterestingOrigin":
	filename, lineno = None, None
	if tb := get_trimmed_traceback(exception):
	filename, lineno, *_ = traceback.extract_tb(tb)[-1]
	return cls(
	type(exception),
	filename,
	lineno,
	# Note that if __cause__ is set it is always equal to __context__, explicitly
	# to support introspection when debugging, so we can use that unconditionally.
	cls.from_exception(exception.__context__) if exception.__context__ else (),
	# We distinguish exception groups by the inner exceptions, as for __context__
	(
	tuple(map(cls.from_exception, exception.exceptions))
	if isinstance(exception, BaseExceptionGroup)
	else ()
	),
	)

Due to exception.__context__.exceptions[0] is exception.
You can also do it without exceptiongroups, but idk if this would ever be encountered in the wild:

def test_recursive_exception2():
    @given(st.data())
    def test_function(data):
        k = ValueError()
        k.__context__ = k
        raise k
    test_function()

Encountered during development of #4110

[Zac-HD]

We should clearly fix both of these - thanks for the report!

[jakkdl]

Since I wanted to reraise a group exception in #4110 I added a quick fix in the latest commit: 14be202#diff-790b2cc456c4882f3785f65d06add0d5ed8e472a5c48b9abcbfd56eb23fb952a

idk what you want the long-term fix to be, but I feel like this should have some standard-ish solution used in pytest and others that parses __context__.