New submission from Arfrever Frehtes Taifersar Arahesis: sys.setrecursionlimit(2**30) breaks interactive shell in Python >=3.3. This bug does not occur during non-interactive execution of scripts / modules. This bug does not occur in versions of Python older than 3.3.
This bug occurs only for some range of values of recursion limit. There are higher values, which do not cause this bug. sys.setrecursionlimit(2**31), as expected, raises OverflowError. Values like 2**31-1 (i.e. 2147483647) cause no problem: $ python3.4 -q >>> import sys >>> sys.setrecursionlimit(2**31) Traceback (most recent call last): File "<stdin>", line 1, in <module> OverflowError: signed integer is greater than maximum >>> sys.setrecursionlimit(2**31-1) >>> sys.getrecursionlimit() 2147483647 >>> 0 0 >>> Lower limit of values of recursion limit, which cause this bug: 715827883 == 2**29 + 2**27 + 2**25 + 2**23 + 2**21 + 2**19 + 2**17 + 2**15 + 2**13 + 2**11 + 2**9 + 2**7 + 2**5 + 2**3 + 2**1 + 1 Upper limit of values of recursion limit, which cause this bug: 1431655765 == 2**30 + 2**28 + 2**26 + 2**24 + 2**22 + 2**20 + 2**18 + 2**16 + 2**14 + 2**12 + 2**10 + 2**8 + 2**6 + 2**4 + 2**2 + 1 Example of this bug: $ python3.4 -q >>> import sys >>> sys.setrecursionlimit(2**30) >>> 0 RuntimeError: maximum recursion depth exceeded during compilation >>> "a" RuntimeError: maximum recursion depth exceeded during compilation >>> RuntimeError: maximum recursion depth exceeded during compilation >>> RuntimeError occurs for each line (even empty). Ctrl+D still works. I use 64-bit GNU/Linux. ---------- components: Interpreter Core keywords: 3.3regression messages: 198460 nosy: Arfrever priority: normal severity: normal status: open title: sys.setrecursionlimit(2**30) breaks interactive shell versions: Python 3.3, Python 3.4 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue19098> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
