.
Thread 1 (LWP 28926):
#0  0x00007fbc2b36c48b in ?? () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fbc2b35bb0e in _IO_default_xsputn () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#2  0x00007fbc2b359bb3 in _IO_file_xsputn () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#3  0x00007fbc2b34eec5 in fwrite () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#4  0x00007fbc2b8bbe2d in ?? () from /usr/lib/man-db/libman-2.6.3.so
No symbol table info available.
#5  0x00007fbc2b6aae49 in pipecmd_exec () from /usr/lib/x86_64-linux-gnu/libpipeline.so.1
No symbol table info available.
#6  0x00007fbc2b6ac61a in pipeline_start () from /usr/lib/x86_64-linux-gnu/libpipeline.so.1
No symbol table info available.
#7  0x00007fbc2bcffc5f in ?? ()
No symbol table info available.
#8  0x00007fbc2bcfbd2b in main ()
No symbol table info available.