Error in `python': double free or corruption (!prev) #6968
Description
I'm consistently getting this error when stopping training (CTRL+C) on version built from head on Jan17. On other hand, running on version from Jan5 head does not exhibit this behavior
tf.__git__version = '0.12.1-1934-g27fca7d-dirty'
session.run completed in 0.01 sec with .0.500000 acc
session.run completed in 0.02 sec with .0.000000 acc
^CTraceback (most recent call last):
File "train.py", line 247, in <module>
a,_ = sess.run([train_acc,optimizer], feed_dict)
File "/home/yaroslav/.conda/envs/tim-jan17/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 767, in run
run_metadata_ptr)
File "/home/yaroslav/.conda/envs/tim-jan17/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 965, in _run
feed_dict_string, options, run_metadata)
File "/home/yaroslav/.conda/envs/tim-jan17/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 1015, in _do_run
target_list, options, run_metadata)
File "/home/yaroslav/.conda/envs/tim-jan17/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 1022, in _do_call
return fn(*args)
File "/home/yaroslav/.conda/envs/tim-jan17/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 1004, in _run_fn
status, run_metadata)
KeyboardInterrupt
*** Error in `python': double free or corruption (!prev): 0x00000000016c55d0 ***
Aborted (core dumped)
Looking at core, it looks like dictionary deletion.
#0 0x00007fe9cbf8a01f in _int_free (av=0x7fe9cc2c9760 <main_arena>, p=<optimized out>, have_lock=0) at malloc.c:3996
#1 0x00007fe9cceb500a in dict_dealloc (mp=0x7fe9558073c8) at Objects/dictobject.c:1596
#2 0x00007fe9cced121f in subtype_dealloc (self=0x7fe95580a080) at Objects/typeobject.c:1193
#3 0x00007fe9cceb023f in free_keys_object (keys=0x24f9620) at Objects/dictobject.c:354
#4 0x00007fe9cced3936 in type_clear (type=0x24f9c68) at Objects/typeobject.c:3270
#5 0x00007fe9ccf8a97c in delete_garbage (old=<optimized out>, collectable=<optimized out>) at Modules/gcmodule.c:866
#6 collect (generation=2, n_collected=0x0, n_uncollectable=0x0, nofail=1) at Modules/gcmodule.c:1014
#7 0x00007fe9ccf8aedd in _PyGC_CollectNoFail () at Modules/gcmodule.c:1605
#8 0x00007fe9ccf5e6d5 in PyImport_Cleanup () at Python/import.c:428
#9 0x00007fe9ccf6a90e in Py_Finalize () at Python/pylifecycle.c:576
#10 0x00007fe9ccf891b9 in Py_Main (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:789
#11 0x0000000000400add in main (argc=2, argv=0x7ffde1cf3f98) at ./Programs/python.c:65