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Thread 1 (Thread 0x7f824ebdc740 (LWP 7872)):
#0  0x00007f824e7d31ad in smtp_do () from /tmp/tmpaZt6v9/usr/lib/x86_64-linux-gnu/libcurl.so.4
No symbol table info available.
#1  0x00007f824e7b28e8 in Curl_do () from /tmp/tmpaZt6v9/usr/lib/x86_64-linux-gnu/libcurl.so.4
No symbol table info available.
#2  0x00007f824e7bd7a7 in Curl_do_perform () from /tmp/tmpaZt6v9/usr/lib/x86_64-linux-gnu/libcurl.so.4
No symbol table info available.
#3  0x00000000004044ac in ?? ()
No symbol table info available.
#4  0x00007f824dff130d in __libc_start_main (main=0x4023b0, argc=5, ubp_av=0x7fffb820ff48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb820ff38) at libc-start.c:226
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 2364779349545512654, 4217700, 140736282558272, 0, 0, -2364932911822082354, -2317671881047085362}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x40bc90, 0x7fffb820ff48}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4242576}}}
        not_first_call = <optimized out>
#5  0x0000000000405b8d in ?? ()
No symbol table info available.
#6  0x00007fffb820ff38 in ?? ()
No symbol table info available.
#7  0x000000000000001c in ?? ()
No symbol table info available.
#8  0x0000000000000005 in ?? ()
No symbol table info available.
#9  0x00007fffb8210510 in ?? ()
No symbol table info available.
#10 0x00007fffb8210515 in ?? ()
No symbol table info available.
#11 0x00007fffb8210518 in ?? ()
No symbol table info available.
#12 0x00007fffb8210532 in ?? ()
No symbol table info available.
#13 0x00007fffb8210535 in ?? ()
No symbol table info available.
#14 0x0000000000000000 in ?? ()
No symbol table info available.