c++ - Program received signal SIGILL, Illegal instruction -

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i using linux x86_64 machine build program. have linked shared library executable. in project calling function has declared vector<string> inside function. program gets killed when function gets called. when debugging through gdb below output get.

program received signal sigill, illegal instruction. 0x00002aaaac4d2be7 in oc_catalog_c::file_totext (this=0x611aa0) @ /usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_vector.h:87 87              : _tp_alloc_type(__a), _m_start(0), _m_finish(0), _m_end_of_storage(0) (gdb) bt 0  0x00002aaaac4d2be7 in oc_catalog_c::file_totext (this=0x611aa0) @ /usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_vector.h:87

is issue of compilation of shared library?? banged head enough on it. please help.

-chaks

adding more info queries: yes,function calling file_totext virtual function in class oc_catalog_c. member variable of other class has object of class oc_catalog_c have virtual function file_totext.using object calling file_totext function of oc_catlog_c virtual function file_totext. show code snippet:

class oc_catalog_c   {     virtual vector<string>  file_totext             (void) const;  }  class b {     const oc_catalog_c*         m_pcatalog;     virtual vector<string>  file_totext             (void) const;  }  vector<string> b::file_totext( void ) const {     vector<string> a_subdata;     a_subdata = m_pcatalog->file_totext(); }

thank guys help. figured out problem causing error.
debugging more , tracing instruction found program failing @ ud2a instruction.
ignoring 1 warning "warning: cannot pass objects of non-pod type 'struct sqlrw_request_cb' through '...'; call abort @ runtime".
resolving these warnings fixed problem related sigill.
more explanation on link: ud2a instruction causing sigill


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