#0  0x00007ff8f74e6651 in ?? () from /tmp/apport_sandbox_4adiydqt/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007ff8f43cf481 in ?? ()
No symbol table info available.
#2  0x000000000000008c in ?? ()
No symbol table info available.
#3  0x2d2f4345fbc1ac00 in ?? ()
No symbol table info available.
#4  0x00007ff800000001 in ?? ()
No symbol table info available.
#5  0x00007ff8e57a9b50 in ?? ()
No symbol table info available.
#6  0x00007ff8e57a9b20 in ?? ()
No symbol table info available.
#7  0x00007ff8e57a9b40 in ?? ()
No symbol table info available.
#8  0x000000000000008c in ?? ()
No symbol table info available.
#9  0x00007ff8e57a9b0c in ?? ()
No symbol table info available.
#10 0x00007ff8e57a9b60 in ?? ()
No symbol table info available.
#11 0x00007ff8f5018c92 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::replace (__n2=<optimized out>, __s=<optimized out>, __n1=0, __pos=0, this=0x7ff8e57a9b40) at /usr/include/c++/8/bits/basic_string.h:1927
No locals.
#12 std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::replace (__k2=<optimized out>, __k1=<optimized out>, __i2=..., __i1=..., this=0x7ff8e57a9b40) at /usr/include/c++/8/bits/basic_string.h:2121
No locals.
#13 std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::assign<char*, void> (__last=<optimized out>, __first=<optimized out>, this=0x7ff8e57a9b40) at /usr/include/c++/8/bits/basic_string.h:1471
No locals.
#14 std::__cxx11::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::str (this=0x7ff8e57a9b68) at /usr/include/c++/8/sstream:174
        __ret = <optimized out>
        __ret = <optimized out>
#15 std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >::str (this=0x7ff81c46ed28) at /usr/include/c++/8/sstream:780
No locals.
#16 show_errors (job=0x557a432be3e0, errorCode=PK_ERROR_ENUM_CANNOT_FETCH_SOURCES, errModify=false) at apt-messages.cpp:55
        errors = <incomplete type>
        Err = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7ff8d800de60 "\200\362\b\330\370\177"}, _M_string_length = 44, {_M_local_buf = "X", '\000' <repeats 14 times>, _M_allocated_capacity = 88}}
#17 0x0000557a4148c03a in pk_backend_job_thread_setup (thread_data=0x557a432bc870) at pk-backend-job.c:726
        helper = 0x557a432bc870
#18 0x00007ff8f768290d in ?? ()
No symbol table info available.
#19 0x0000000000000000 in ?? ()
No symbol table info available.