$ gdb python3
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GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
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Copyright (C) 2018 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law. Type "show copying"
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and "show warranty" for details.
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This GDB was configured as "x86_64-linux-gnu".
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Type "show configuration" for configuration details.
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For bug reporting instructions, please see:
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<http://www.gnu.org/software/gdb/bugs/>.
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Find the GDB manual and other documentation resources online at:
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<http://www.gnu.org/software/gdb/documentation/>.
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For help, type "help".
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Type "apropos word" to search for commands related to "word"...
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Reading symbols from python3...Reading symbols from /usr/lib/debug/.build-id/5f/4de7b7974f514b4d5baf54bc956904a450c144.debug...done.
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done.
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(gdb) run ./connection_pool_test.py
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Starting program: /usr/bin/python3 ./connection_pool_test.py
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[Thread debugging using libthread_db enabled]
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Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
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Program received signal SIGSEGV, Segmentation fault.
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0x00007ffff5f356da in MrdbPool_dealloc (self=0x7ffff50b92f0) at src/mariadb_pooling.c:311
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311 src/mariadb_pooling.c: No such file or directory.
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(gdb) where
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#0 0x00007ffff5f356da in MrdbPool_dealloc (self=0x7ffff50b92f0) at src/mariadb_pooling.c:311
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#1 0x000000000055146f in type_call.lto_priv () at ../Objects/typeobject.c:918
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#2 0x00000000005a9cbc in _PyObject_FastCallDict (kwargs=<optimized out>, nargs=0, args=0xaefb40, func=<type at remote 0x7ffff61411a0>) at ../Objects/tupleobject.c:131
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#3 _PyObject_FastCallKeywords () at ../Objects/abstract.c:2496
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#4 0x000000000050a5c3 in call_function.lto_priv () at ../Python/ceval.c:4875
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#5 0x000000000050cd96 in _PyEval_EvalFrameDefault () at ../Python/ceval.c:3351
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#6 0x0000000000509758 in PyEval_EvalFrameEx (throwflag=0, f=Frame 0xaef9b8, for file ./connection_pool_test.py, line 16, in create_connection_pool ()) at ../Python/ceval.c:754
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#7 _PyFunction_FastCall (globals=<optimized out>, nargs=11467192, args=<optimized out>, co=<optimized out>) at ../Python/ceval.c:4933
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#8 fast_function.lto_priv () at ../Python/ceval.c:4968
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#9 0x000000000050a48d in call_function.lto_priv () at ../Python/ceval.c:4872
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#10 0x000000000050bfb4 in _PyEval_EvalFrameDefault () at ../Python/ceval.c:3335
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#11 0x0000000000507d64 in PyEval_EvalFrameEx (throwflag=0, f=Frame 0xae00f8, for file ./connection_pool_test.py, line 24, in <module> ()) at ../Python/ceval.c:754
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#12 _PyEval_EvalCodeWithName.lto_priv.1820 () at ../Python/ceval.c:4166
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#13 0x000000000050ae13 in PyEval_EvalCodeEx (closure=0x0, kwdefs=0x0, defcount=0, defs=0x0, kwcount=0, kws=0x0, argcount=0, args=0x0, locals=<optimized out>, globals=<optimized out>, _co=<optimized out>)
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at ../Python/ceval.c:4187
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#14 PyEval_EvalCode (co=<optimized out>, globals=<optimized out>, locals=<optimized out>) at ../Python/ceval.c:731
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#15 0x0000000000634c82 in run_mod () at ../Python/pythonrun.c:1025
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#16 0x0000000000634d37 in PyRun_FileExFlags () at ../Python/pythonrun.c:978
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#17 0x00000000006384ef in PyRun_SimpleFileExFlags () at ../Python/pythonrun.c:419
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#18 0x00000000006386c5 in PyRun_AnyFileExFlags () at ../Python/pythonrun.c:81
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#19 0x0000000000639091 in run_file (p_cf=0x7fffffffde5c, filename=<optimized out>, fp=<optimized out>) at ../Modules/main.c:340
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#20 Py_Main () at ../Modules/main.c:810
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#21 0x00000000004b0d00 in main (argc=2, argv=0x7fffffffe058) at ../Programs/python.c:69
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connection_pool_test.py