saswati@saswati-Aspire:~$ python test1.py 0 **************** [] 1 **************** [, ] *** Break *** segmentation violation 2 **************** [ =========================================================== There was a crash. This is the entire stack trace of all threads: =========================================================== Thread 2 (Thread 0x7ff1c05ab700 (LWP 6705)): #0 sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85 #1 0x000000000055058d in ?? () #2 0x0000000000523f6d in PyEval_EvalFrameEx () #3 0x0000000000568b3a in ?? () #4 0x0000000000525cb7 in PyEval_EvalFrameEx () #5 0x00000000005247ea in PyEval_EvalFrameEx () #6 0x00000000005247ea in PyEval_EvalFrameEx () #7 0x0000000000568b3a in ?? () #8 0x00000000004c2604 in ?? () #9 0x00000000004c8c8b in PyEval_CallObjectWithKeywords () #10 0x000000000058b132 in ?? () #11 0x00007ff1d6ea6184 in start_thread (arg=0x7ff1c05ab700) at pthread_create.c:312 #12 0x00007ff1d6bd2ffd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 Thread 1 (Thread 0x7ff1d72bd740 (LWP 6687)): #0 0x00007ff1d6b999a9 in __libc_waitpid (pid=6716, stat_loc=stat_loc entry=0x7fff0bf4a740, options=options entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:40 #1 0x00007ff1d6b1b232 in do_system (line=) at ../sysdeps/posix/system.c:148 #2 0x00007ff1d54c6389 in TUnixSystem::StackTrace() () from /home/saswati/root-6.10.02/lib/libCore.so #3 0x00007ff1d54c8bbc in TUnixSystem::DispatchSignals(ESignals) () from /home/saswati/root-6.10.02/lib/libCore.so #4 #5 0x0000000000000000 in ?? () #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== The lines below might hint at the cause of the crash. You may get help by asking at the ROOT forum http://root.cern.ch/forum. Only if you are really convinced it is a bug in ROOT then please submit a report at http://root.cern.ch/bugs. Please post the ENTIRE stack trace from above as an attachment in addition to anything else that might help us fixing this issue. =========================================================== #5 0x0000000000000000 in ?? () #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== *** Break *** segmentation violation , =========================================================== There was a crash. This is the entire stack trace of all threads: =========================================================== Thread 2 (Thread 0x7ff1c05ab700 (LWP 6705)): #0 sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85 #1 0x000000000055058d in ?? () #2 0x0000000000523f6d in PyEval_EvalFrameEx () #3 0x0000000000568b3a in ?? () #4 0x0000000000525cb7 in PyEval_EvalFrameEx () #5 0x00000000005247ea in PyEval_EvalFrameEx () #6 0x00000000005247ea in PyEval_EvalFrameEx () #7 0x0000000000568b3a in ?? () #8 0x00000000004c2604 in ?? () #9 0x00000000004c8c8b in PyEval_CallObjectWithKeywords () #10 0x000000000058b132 in ?? () #11 0x00007ff1d6ea6184 in start_thread (arg=0x7ff1c05ab700) at pthread_create.c:312 #12 0x00007ff1d6bd2ffd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 Thread 1 (Thread 0x7ff1d72bd740 (LWP 6687)): #0 0x00007ff1d6b999a9 in __libc_waitpid (pid=6820, stat_loc=stat_loc entry=0x7fff0bf4a740, options=options entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:40 #1 0x00007ff1d6b1b232 in do_system (line=) at ../sysdeps/posix/system.c:148 #2 0x00007ff1d54c6389 in TUnixSystem::StackTrace() () from /home/saswati/root-6.10.02/lib/libCore.so #3 0x00007ff1d54c8bbc in TUnixSystem::DispatchSignals(ESignals) () from /home/saswati/root-6.10.02/lib/libCore.so #4 #5 0x00007ff1d6e97be8 in main_arena () from /lib/x86_64-linux-gnu/libc.so.6 #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== The lines below might hint at the cause of the crash. You may get help by asking at the ROOT forum http://root.cern.ch/forum. Only if you are really convinced it is a bug in ROOT then please submit a report at http://root.cern.ch/bugs. Please post the ENTIRE stack trace from above as an attachment in addition to anything else that might help us fixing this issue. =========================================================== #5 0x00007ff1d6e97be8 in main_arena () from /lib/x86_64-linux-gnu/libc.so.6 #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== , ] *** Break *** segmentation violation 3 **************** [, , =========================================================== There was a crash. This is the entire stack trace of all threads: =========================================================== Thread 2 (Thread 0x7ff1c05ab700 (LWP 6705)): #0 sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85 #1 0x000000000055058d in ?? () #2 0x0000000000523f6d in PyEval_EvalFrameEx () #3 0x0000000000568b3a in ?? () #4 0x0000000000525cb7 in PyEval_EvalFrameEx () #5 0x00000000005247ea in PyEval_EvalFrameEx () #6 0x00000000005247ea in PyEval_EvalFrameEx () #7 0x0000000000568b3a in ?? () #8 0x00000000004c2604 in ?? () #9 0x00000000004c8c8b in PyEval_CallObjectWithKeywords () #10 0x000000000058b132 in ?? () #11 0x00007ff1d6ea6184 in start_thread (arg=0x7ff1c05ab700) at pthread_create.c:312 #12 0x00007ff1d6bd2ffd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 Thread 1 (Thread 0x7ff1d72bd740 (LWP 6687)): #0 0x00007ff1d6b999a9 in __libc_waitpid (pid=6924, stat_loc=stat_loc entry=0x7fff0bf4a740, options=options entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:40 #1 0x00007ff1d6b1b232 in do_system (line=) at ../sysdeps/posix/system.c:148 #2 0x00007ff1d54c6389 in TUnixSystem::StackTrace() () from /home/saswati/root-6.10.02/lib/libCore.so #3 0x00007ff1d54c8bbc in TUnixSystem::DispatchSignals(ESignals) () from /home/saswati/root-6.10.02/lib/libCore.so #4 #5 0x0000000000000000 in ?? () #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== The lines below might hint at the cause of the crash. You may get help by asking at the ROOT forum http://root.cern.ch/forum. Only if you are really convinced it is a bug in ROOT then please submit a report at http://root.cern.ch/bugs. Please post the ENTIRE stack trace from above as an attachment in addition to anything else that might help us fixing this issue. =========================================================== #5 0x0000000000000000 in ?? () #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== , ] *** Break *** segmentation violation [, , =========================================================== There was a crash. This is the entire stack trace of all threads: =========================================================== Thread 2 (Thread 0x7ff1c05ab700 (LWP 6705)): #0 sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85 #1 0x000000000055058d in ?? () #2 0x0000000000523f6d in PyEval_EvalFrameEx () #3 0x0000000000568b3a in ?? () #4 0x0000000000525cb7 in PyEval_EvalFrameEx () #5 0x00000000005247ea in PyEval_EvalFrameEx () #6 0x00000000005247ea in PyEval_EvalFrameEx () #7 0x0000000000568b3a in ?? () #8 0x00000000004c2604 in ?? () #9 0x00000000004c8c8b in PyEval_CallObjectWithKeywords () #10 0x000000000058b132 in ?? () #11 0x00007ff1d6ea6184 in start_thread (arg=0x7ff1c05ab700) at pthread_create.c:312 #12 0x00007ff1d6bd2ffd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 Thread 1 (Thread 0x7ff1d72bd740 (LWP 6687)): #0 0x00007ff1d6b999a9 in __libc_waitpid (pid=7028, stat_loc=stat_loc entry=0x7fff0bf4a740, options=options entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:40 #1 0x00007ff1d6b1b232 in do_system (line=) at ../sysdeps/posix/system.c:148 #2 0x00007ff1d54c6389 in TUnixSystem::StackTrace() () from /home/saswati/root-6.10.02/lib/libCore.so #3 0x00007ff1d54c8bbc in TUnixSystem::DispatchSignals(ESignals) () from /home/saswati/root-6.10.02/lib/libCore.so #4 #5 0x0000000000000000 in ?? () #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== The lines below might hint at the cause of the crash. You may get help by asking at the ROOT forum http://root.cern.ch/forum. Only if you are really convinced it is a bug in ROOT then please submit a report at http://root.cern.ch/bugs. Please post the ENTIRE stack trace from above as an attachment in addition to anything else that might help us fixing this issue. =========================================================== #5 0x0000000000000000 in ?? () #6 0x00007ff1d71f4017 in ?? () #7 0x00007ff1d71f4000 in ?? () #8 0x0000000000000000 in ?? () =========================================================== , ] saswati@saswati-Aspire:~$