Boost serilization code crashes - c++

Question

My program is crashing on the boost::archive::text_oarchive ar(ofs) function. My boost version is 1.58 and OS is Ubuntu 16.04
void saveToFile()
{
string fileName ("/tmp/test.txt") ;
ofstream ofs(fileName.c_str());
if (ofs.good())
{
boost::archive::text_oarchive ar(ofs);
ar & fileName;
return;
}
}
int main(int argc, char *argv[])
{
saveToFile();
return 0;
}
Here is the stack trace.
#0 0x00007f85e9252418 in __GI_raise (sig=sig#entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1 0x00007f85e925401a in __GI_abort () at abort.c:89
#2 0x00007f85e929472a in __libc_message (do_abort=do_abort#entry=2, fmt=fmt#entry=0x7f85e93ad6b0 "*** Error in `%s': %s: 0x%s ***\n")
at ../sysdeps/posix/libc_fatal.c:175
#3 0x00007f85e929cf4a in malloc_printerr (ar_ptr=<optimized out>, ptr=<optimized out>, str=0x7f85e93aa48f "free(): invalid pointer", action=3)
at malloc.c:5007
#4 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3868
#5 0x00007f85e92a0abc in __GI___libc_free (mem=<optimized out>) at malloc.c:2969
#6 0x00000000004082fe in saveToFile () at main.cpp:56
#7 0x00000000004083b0 in main (argc=4, argv=0x7ffc120a4fa8) at main.cpp:68