.
Thread 1 (Thread 0x7f1f693a69c0 (LWP 2946)):
#0  0x00007f1f66f27117 in __GI___isnan (x=7,0632779330701141e-304) at ../sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c:28
        hx = <optimized out>
#1  0x00007f1f66f28808 in __GI_sigfillset (set=0xb82) at ../signal/sigfillset.c:33
No locals.
#2  0x0000000000000020 in ?? ()
No symbol table info available.
#3  0x0000000000000000 in ?? ()
No symbol table info available.