Starting program: /usr/bin/go-5 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
process 16569 is executing new program: /usr/x86_64-pc-linux-gnu/gcc-bin/5.4.0/go-5
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007fff00000001 in ?? ()
#0  0x00007fff00000001 in ?? ()
No symbol table info available.
#1  0x00007ffff784b480 in unwind (context=<optimized out>, vdata=0x7ffff7fa1800) at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libbacktrace/backtrace.c:83
        bdata = 0x7ffff7fa1800
        pc = <optimized out>
        ip_before_insn = 0
#2  0x00007ffff7fb55b9 in _Unwind_Backtrace (trace=trace@entry=0x7ffff784b400 <unwind>, trace_argument=trace_argument@entry=0x7ffff7fa1800)
    at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgcc/unwind.inc:295
        fs = {regs = {reg = {{loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {
                  reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 18446744073709551592, offset = -24, 
                  exp = 0xffffffffffffffe8 <error: Cannot access memory at address 0xffffffffffffffe8>}, how = REG_SAVED_OFFSET}, {loc = {reg = 0, offset = 0, 
                  exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 18446744073709551600, offset = -16, 
                  exp = 0xfffffffffffffff0 <error: Cannot access memory at address 0xfffffffffffffff0>}, how = REG_SAVED_OFFSET}, {loc = {reg = 0, offset = 0, 
                  exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, 
                how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {
                  reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, 
                  exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 0, offset = 0, exp = 0x0}, how = REG_UNSAVED}, {loc = {reg = 18446744073709551608, offset = -8, 
                  exp = 0xfffffffffffffff8 <error: Cannot access memory at address 0xfffffffffffffff8>}, how = REG_SAVED_OFFSET}, {loc = {reg = 0, offset = 0, 
                  exp = 0x0}, how = REG_UNSAVED}}, prev = 0x0, cfa_offset = 16, cfa_reg = 6, cfa_exp = 0x0, cfa_how = CFA_REG_OFFSET}, 
          pc = 0x7ffff745fbe8 <runtime_callers+152>, personality = 0x0, data_align = -8, code_align = 1, retaddr_column = 16, fde_encoding = 27 '\033', 
          lsda_encoding = 255 '\377', saw_z = 1 '\001', signal_frame = 0 '\000', eh_ptr = 0x0}
        context = {reg = {0x0, 0x0, 0x0, 0x7ffff7fa17c8, 0x0, 0x0, 0x7ffff7fa1840, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7ffff7fa17d0, 0x7ffff7fa17d8, 0x7ffff7fa17e0, 
            0x7ffff7fa17e8, 0x7ffff7fa1848, 0x0}, cfa = 0x7ffff7fa1850, ra = 0x7ffff745fbcc <runtime_callers+124>, lsda = 0x0, bases = {tbase = 0x0, dbase = 0x0, 
            func = 0x7ffff745fb50 <runtime_callers>}, flags = 4611686018427387904, version = 0, args_size = 0, by_value = '\000' <repeats 17 times>}
        code = _URC_NO_REASON
#3  0x00007ffff784b4f3 in backtrace_full (state=<optimized out>, skip=skip@entry=0, callback=callback@entry=0x7ffff745f840 <callback>, 
    error_callback=error_callback@entry=0x7ffff745fad0 <error_callback>, data=data@entry=0x7ffff7fa1850)
    at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libbacktrace/backtrace.c:106
        bdata = {skip = 0, state = 0x7ffff7fe6000, callback = 0x7ffff745f840 <callback>, error_callback = 0x7ffff745fad0 <error_callback>, data = 0x7ffff7fa1850, 
          ret = 0}
#4  0x00007ffff745fbcc in runtime_callers (skip=skip@entry=1, locbuf=locbuf@entry=0x7ffff7fa1890, m=m@entry=32, keep_thunks=keep_thunks@entry=0 '\000')
    at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/go-callers.c:168
        data = {locbuf = 0x7ffff7fa1890, skip = 2, index = 0, max = 32, keep_thunks = 0}
#5  0x00007ffff7481e85 in runtime_MProf_Malloc (p=p@entry=0xc208000000, size=size@entry=16)
    at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/mprof.goc:189
        stk = {{pc = 0, filename = {str = 0x0, len = 0}, function = {str = 0x0, len = 0}, lineno = 0} <repeats 19 times>, {pc = 3, filename = {
              str = 0x10000 <error: Cannot access memory at address 0x10000>, len = 3}, function = {str = 0x2000 <error: Cannot access memory at address 0x2000>, 
              len = 8192}, lineno = 824633720832}, {pc = 128, filename = {str = 0x20000 <error: Cannot access memory at address 0x20000>, len = 140737353751760}, 
            function = {str = 0x7ffff7469f4a <mmap_fixed+90> "H\211E\260I9\305t[\350\070w\375\377Lc\340\350@w\375\377H\211E\270", <incomplete sequence \307>, 
              len = 833357807616}, lineno = 13019119616}, {pc = 824633720832, filename = {
              str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, len = 140737353751808}, function = {
              str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, len = 140737351807936}, lineno = 824633720832}, {pc = 3, 
            filename = {str = 0x10000 <error: Cannot access memory at address 0x10000>, len = 140737351865088}, function = {
              str = 0x2000 <error: Cannot access memory at address 0x2000>, len = 128}, lineno = 140737351864928}, {pc = 140737353751824, filename = {
              str = 0x7ffff746a09b <runtime_SysAlloc+91> "H\203\370\377t\037\360I\001\034$H\213U\350dH3\024%(", len = 140737351807936}, function = {
              str = 0x7ffff7fa1d20 "P\035\372\367\377\177", len = 140737354116510}, lineno = 0}, {pc = 8455331168, filename = {
              str = 0x7ffff7e64080 "H\263\334\367\377\177", len = 140737353751888}, function = {
              str = 0x7ffff7462f71 <runtime_nanotime+49> "Hi", <incomplete sequence \340>, len = 1495692780}, lineno = 203413}, {pc = 140737352450176, filename = {
              str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, len = 140737353751920}, function = {
              str = 0x7ffff7475692 <runtime_m+50> "H\213\200", len = 140737353751952}, lineno = 7997883558952013824}, {pc = 140737353751952, filename = {
              str = 0x7ffff7468b41 <runtime_unlock+65> "\213HX\215Q\377\211PX\205\322x4H\213E\370dH3\004%(", len = 140737351864928}, function = {
              str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, len = 140737353751984}, lineno = 140737342035602}, {pc = 0, 
            filename = {str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, len = 140737353752064}, function = {
              str = 0x7ffff7468a06 <runtime_lock+70> "\213PX\215J\001\211HX\205\322\017\210", <incomplete sequence \334>, len = 140737353752032}, 
            lineno = 140737342035602}, {pc = 0, filename = {str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, 
              len = 140737353752064}, function = {str = 0x7ffff7468b41 <runtime_unlock+65> "\213HX\215Q\377\211PX\205\322x4H\213E\370dH3\004%(", 
              len = 140737351841768}, lineno = 7997883558952013824}, {pc = 140737353752192, filename = {
              str = 0x7ffff7469c98 <runtime_MCentral_CacheSpan+216> "L\211\370H\213M\310dH3\f%(", len = 140737353752124}, function = {str = 0x7ffff7fa1e38 "", 
              len = 8192}, lineno = 512}, {pc = 140737353752144, filename = {str = 0x100000200 <error: Cannot access memory at address 0x100000200>, len = 16}, 
            function = {str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, len = 140737351865088}, lineno = 140737352433696}, {
            pc = 140737353752192, filename = {str = 0x7ffff7475692 <runtime_m+50> "H\213\200", len = 140737351841752}, function = {
              str = 0x6efe30b8e6459000 <error: Cannot access memory at address 0x6efe30b8e6459000>, len = 140737353752224}, lineno = 140737342035602}}
        b = <optimized out>
        nstk = <optimized out>
#6  0x00007ffff747fdde in profilealloc (size=16, v=0xc208000000) at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/malloc.goc:315
        rate = <optimized out>
        next = <optimized out>
        c = <optimized out>
#7  runtime_mallocgc (size=16, typ=typ@entry=0, flag=flag@entry=16) at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/malloc.goc:253
        m = 0x7ffff7dd6a00 <runtime_m0>
        g = <optimized out>
        sizeclass = <optimized out>
        tinysize = <optimized out>
        size1 = <optimized out>
        rate = <optimized out>
        c = <optimized out>
        s = <optimized out>
        v = 0xc208000000
        next = <optimized out>
        tiny = <optimized out>
        incallback = <optimized out>
#8  0x00007ffff748033d in __go_alloc (size=size@entry=16) at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/malloc.goc:321
No locals.
#9  0x00007ffff7480961 in runtime_mallocinit () at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/malloc.goc:643
        p = <optimized out>
        p1 = <optimized out>
        arena_size = <optimized out>
        bitmap_size = <optimized out>
        spans_size = <optimized out>
        p_size = <optimized out>
        i = <optimized out>
        reserved = 0 '\000'
#10 0x00007ffff7475b50 in runtime_schedinit () at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/proc.c:461
        n = <optimized out>
        procs = <optimized out>
        p = <optimized out>
        i = {__type_descriptor = 0x0, __object = 0x0}
#11 0x0000555555588467 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgo/runtime/go-main.c:47
No locals.
#12 0x00005555555cd89a in __morestack () at /usr/src/debug/sys-devel/gcc-5.4.0-r3/gcc-5.4.0/libgcc/config/i386/morestack.S:544
No locals.
#13 0x00007ffff6942794 in __libc_start_main (main=0x5555555883d0 <main>, argc=1, argv=0x7fffffffcdf8, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fffffffcde8) at ../csu/libc-start.c:289
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -4607931920634405869, 93824992752944, 140737488342512, 0, 0, -4607931920642794477, -4607951515032019949}, 
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7ffff7ffe128, 0x7fffffffcde0}, data = {prev = 0x0, cleanup = 0x0, canceltype = -134225624}}}
        not_first_call = <optimized out>
#14 0x00005555555884b9 in _start ()
No symbol table info available.