New submission from Omer Katz: I have found what appears to be a segfualt in time.sleep but I'm not sure. I have verified that the segfualt occurs both on Python 2.7.8 and 3.4.2.
The following program that reproduces the segfault uses my fork of billiard, a replacement for the multiprocessing module that is used by celery. In order to install: pip install git+https://github.com/thedrow/billiard@topic/dill-with-threads The program: from billiard.pool import ThreadPool p1 = ThreadPool() class Foo(object): def a(self): print("a") return 1 def do(self): return p1.apply_async(self.a) foo = Foo() r = foo.do() print(r.get()) p1.close() p1.join() The output from gdb: gdb -ex r -q --args python mt_example.py Reading symbols from python...done. Starting program: /home/omer/.virtualenvs/billiard/bin/python mt_example.py [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff31db700 (LWP 2897)] [New Thread 0x7ffff29da700 (LWP 2898)] [New Thread 0x7ffff21d9700 (LWP 2899)] [New Thread 0x7ffff19d8700 (LWP 2900)] [New Thread 0x7ffff11d7700 (LWP 2901)] [New Thread 0x7ffff09d6700 (LWP 2902)] [New Thread 0x7fffdbfff700 (LWP 2903)] Program received signal SIGTERM, Terminated. [Switching to Thread 0x7ffff21d9700 (LWP 2899)] 0x00007ffff71dc1c3 in select () at ../sysdeps/unix/syscall-template.S:81 81 ../sysdeps/unix/syscall-template.S: No such file or directory. (gdb) bt #0 0x00007ffff71dc1c3 in select () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007ffff5fd5d5d in floatsleep (secs=<optimized out>) at Modules/timemodule.c:948 #2 time_sleep (self=<optimized out>, args=<optimized out>) at Modules/timemodule.c:206 #3 0x00000000004b658c in call_function (oparg=<optimized out>, pp_stack=0x7ffff21d8540) at Python/ceval.c:4033 #4 PyEval_EvalFrameEx (f=f@entry=0x7ffff463eda8, throwflag=throwflag@entry=0) at Python/ceval.c:2679 #5 0x00000000004b6f6b in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=<optimized out>, argcount=argcount@entry=4, kws=<optimized out>, kwcount=0, defs=0x7ffff40bab68, defcount=1, closure=0x0) at Python/ceval.c:3265 #6 0x00000000004b5b28 in fast_function (nk=<optimized out>, na=4, n=<optimized out>, pp_stack=0x7ffff21d8730, func=0x7ffff31e2938) at Python/ceval.c:4129 #7 call_function (oparg=<optimized out>, pp_stack=0x7ffff21d8730) at Python/ceval.c:4054 #8 PyEval_EvalFrameEx (f=f@entry=0x7fffe8000b50, throwflag=throwflag@entry=0) at Python/ceval.c:2679 #9 0x00000000004b6f6b in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=<optimized out>, argcount=argcount@entry=1, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3265 #10 0x00000000004b5b28 in fast_function (nk=<optimized out>, na=1, n=<optimized out>, pp_stack=0x7ffff21d8920, func=0x7ffff31e28c0) at Python/ceval.c:4129 #11 call_function (oparg=<optimized out>, pp_stack=0x7ffff21d8920) at Python/ceval.c:4054 #12 PyEval_EvalFrameEx (f=f@entry=0x7fffe8000910, throwflag=throwflag@entry=0) at Python/ceval.c:2679 #13 0x00000000004b5bc7 in fast_function (nk=<optimized out>, na=1, n=<optimized out>, pp_stack=0x7ffff21d8a70, func=0x7ffff7e55230) ---Type <return> to continue, or q <return> to quit--- at Python/ceval.c:4119 #14 call_function (oparg=<optimized out>, pp_stack=0x7ffff21d8a70) at Python/ceval.c:4054 #15 PyEval_EvalFrameEx (f=f@entry=0x7ffff31f1210, throwflag=throwflag@entry=0) at Python/ceval.c:2679 #16 0x00000000004b6f6b in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=args@entry=0x7ffff31dca68, argcount=<optimized out>, kws=kws@entry=0x0, kwcount=kwcount@entry=0, defs=defs@entry=0x0, defcount=defcount@entry=0, closure=0x0) at Python/ceval.c:3265 #17 0x0000000000529e70 in function_call (func=0x7ffff7e55140, arg=0x7ffff31dca50, kw=0x0) at Objects/funcobject.c:526 #18 0x0000000000422f5a in PyObject_Call (func=func@entry=0x7ffff7e55140, arg=arg@entry=0x7ffff31dca50, kw=kw@entry=0x0) at Objects/abstract.c:2529 #19 0x000000000042747d in instancemethod_call (func=0x7ffff7e55140, arg=0x7ffff31dca50, kw=0x0) at Objects/classobject.c:2602 #20 0x0000000000422f5a in PyObject_Call (func=func@entry=0x7ffff4636d70, arg=arg@entry=0x7ffff7f93050, kw=<optimized out>) at Objects/abstract.c:2529 #21 0x00000000004b07f7 in PyEval_CallObjectWithKeywords (func=0x7ffff4636d70, arg=0x7ffff7f93050, kw=<optimized out>) at Python/ceval.c:3902 #22 0x00000000004fae92 in t_bootstrap (boot_raw=0x8899c0) at ./Modules/threadmodule.c:614 #23 0x00007ffff7bc40a5 in start_thread (arg=0x7ffff21d9700) at pthread_create.c:309 #24 0x00007ffff71e484d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 ---------- components: Interpreter Core messages: 232059 nosy: Omer.Katz priority: normal severity: normal status: open title: Segfault on time.sleep type: crash versions: Python 2.7, Python 3.4 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue22985> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
