(gdb) bt
#0  0x00007fff97b47212 in __pthread_kill ()
#1  0x00007fff962e7af4 in pthread_kill ()
#2  0x00007fff9632bdce in abort ()
#3  0x00007fff962ff959 in free ()
#4  0x00000001004636f5 in sg_free (ptr=0x10270cf30) at lib/memory.cpp:206
#5  0x00000001004a3090 in shogun::SGVector<double>::free_data (this=0x7fff5fbfe4b8) at lib/SGVector.cpp:152
#6  0x0000000100002de3 in shogun::SGReferencedData::unref (this=0x7fff5fbfe4b8) at SGReferencedData.h:157
#7  0x00000001004a11f6 in shogun::SGVector<double>::~SGVector (this=0x7fff5fbfe4b8) at lib/SGVector.cpp:47
#8  0x00000001004a11c5 in shogun::SGVector<double>::~SGVector (this=0x7fff5fbfe4b8) at SGVector.h:46
#9  0x0000000100002563 in test_multiclass_mkl_cv () at evaluation_cross_validation_multiclass_mkl.cpp:145
#10 0x00000001000025f9 in main (argc=1, argv=0x7fff5fbfe5d8) at evaluation_cross_validation_multiclass_mkl.cpp:153