(gdb) bt full
#0  0x00000000004a25d1 in tzload (name=0x4f71cf "posixrules", sp=0x40629200, doextend=0) at stdtime/localtime.c:299
        fullname = '\0' <repeats 4096 times>
        p = <value optimized out>
        i = <value optimized out>
        fid = <value optimized out>
        stored = <value optimized out>
        nread = <value optimized out>
        u = Cannot access memory at address 0x4060f070