Ryan Petrello <r...@ryanpetrello.com> added the comment:
Actually, I think I *am* seeing this on 3.7:
(gdb) bt
#0 0x00007f130d530adb in futex_abstimed_wait (cancel=true, private=<optimized
out>, abstime=0x0, expected=0,
futex=0x142c6d0) at ../nptl/sysdeps/unix/sysv/linux/sem_waitcommon.c:43
#1 do_futex_wait (sem=sem@entry=0x142c6d0, abstime=0x0) at
../nptl/sysdeps/unix/sysv/linux/sem_waitcommon.c:223
#2 0x00007f130d530b6f in __new_sem_wait_slow (sem=0x142c6d0, abstime=0x0)
at ../nptl/sysdeps/unix/sysv/linux/sem_waitcommon.c:292
#3 0x00007f130d530c0b in __new_sem_wait (sem=<optimized out>) at
../nptl/sysdeps/unix/sysv/linux/sem_wait.c:28
#4 0x0000000000535baa in PyThread_acquire_lock_timed (lock=0x142c6d0,
microseconds=microseconds@entry=-1,
intr_flag=intr_flag@entry=0) at Python/thread_pthread.h:340
#5 0x0000000000535c24 in PyThread_acquire_lock (lock=<optimized out>,
waitflag=waitflag@entry=1)
at Python/thread_pthread.h:576
#6 0x000000000058949a in _enter_buffered_busy (self=0x7f130ca0fbf8) at
./Modules/_io/bufferedio.c:282
#7 buffered_flush (self=0x7f130ca0fbf8, args=<optimized out>) at
./Modules/_io/bufferedio.c:835
#8 0x000000000043aae8 in _PyMethodDef_RawFastCallDict (kwargs=<optimized out>,
nargs=0, args=<optimized out>,
self=0x7f130ca0fbf8, method=0x8eeda0 <bufferedwriter_methods+320>) at
Objects/call.c:482
#9 _PyCFunction_FastCallDict (func=0x7f130aeb3438, args=<optimized out>,
nargs=0, kwargs=<optimized out>)
at Objects/call.c:582
----------
versions: +Python 3.7
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<https://bugs.python.org/issue37429>
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