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Reading symbols from /usr/sbin/apache2...Reading symbols from /usr/lib/debug/.build-id/2a/6c2a940d6b628045a06c1d42bf66445076c869.debug...done.
done.
[New LWP 1417]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/sbin/apache2 -k start'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007feb5dd26ad0 in ?? ()
(gdb)
Thread 1 (Thread 0x7feb61ecee00 (LWP 1417)):
#0  0x00007feb5dd26ad0 in ?? ()
No symbol table info available.
#1  0x00005596bd360e0e in ap_run_mpm_query (query_code=query_code@entry=2, result=result@entry=0x7ffd972124ec, _rv=_rv@entry=0x7ffd972124c4) at mpm_common.c:97
        pHook = <optimized out>
        n = 0
        rv = -1
#2  0x00005596bd361b9e in ap_mpm_query (query_code=query_code@entry=2, result=result@entry=0x7ffd972124ec) at mpm_common.c:419
        rv = 0
#3  0x00005596bd381a04 in log_tid (info=<optimized out>, arg=<optimized out>, buf=0x7ffd9721263e "", buflen=8130) at log.c:612
        result = 21910
#4  0x00005596bd382926 in do_errorlog_default (buflen=8192, args=0x7ffd97216680, errstr_fmt=0x5596bd3a9958 "AH00060: seg fault or similar nasty error detected in the parent process", errstr_end=<synthetic pointer>,
    errstr_start=<synthetic pointer>, buf=0x7ffd97212600 "[Fri Sep 22 13:19:43.064632 2017] [core:notice] [pid 1417:tid ", info=0x7ffd972125b0) at log.c:944
        len = 62
        field_start = 57
        item_len = <optimized out>
        scratch = '\000' <repeats 704 times>...
#5  log_error_core (file=0x5596bd3a982c "mpm_unix.c", line=989, module_index=0, level=<optimized out>, status=0, s=<optimized out>, c=<optimized out>, r=0x0, pool=0x0,
    fmt=0x5596bd3a9958 "AH00060: seg fault or similar nasty error detected in the parent process", args=0x7ffd97216680) at log.c:1270
        log_format = <optimized out>
        len = 0
        errstr_start = 0
        errstr_end = 0
        errstr = "[Fri Sep 22 13:19:43.064632 2017] [core:notice] [pid 1417:tid ", '\000' <repeats 418 times>...
        logf = 0x7feb61eee0a0
        level_and_mask = 5
        rmain = 0x0
        sconf = 0x0
        info = {s = 0x0, c = 0x0, r = 0x0, rmain = 0x0, pool = 0x0, file = 0x5596bd3a982c "mpm_unix.c", line = 989, module_index = 0, level = 5, status = 0, using_syslog = 0, startup = 0,
          format = 0x5596bd3a9958 "AH00060: seg fault or similar nasty error detected in the parent process"}
        log_conn_info = <optimized out>
        log_req_info = 0
        lines = 0x0
        done = <optimized out>
        line_number = 0
#6  0x00005596bd382e07 in ap_log_error_ (file=file@entry=0x5596bd3a982c "mpm_unix.c", line=line@entry=989, module_index=module_index@entry=0, level=level@entry=5, status=status@entry=0, s=<optimized out>,
    fmt=0x5596bd3a9958 "AH00060: seg fault or similar nasty error detected in the parent process") at log.c:1319
        args = {{gp_offset = 48, fp_offset = 48, overflow_arg_area = 0x7ffd97216768, reg_save_area = 0x7ffd972166a0}}
#7  0x00005596bd389be0 in sig_coredump (sig=11) at mpm_unix.c:986
No locals.
#8  <signal handler called>
No locals.
#9  0x00005596bd39f267 in sig_term (sig=15) at unixd.c:452
No locals.
#10 <signal handler called>
No locals.
#11 0x00007feb6111dc77 in munmap () at ../sysdeps/unix/syscall-template.S:84
No locals.
#12 0x00007feb6161c446 in apr_allocator_destroy (allocator=0x5596be0c8010) at ./memory/unix/apr_pools.c:190
        index = <optimized out>
        node = <optimized out>
#13 0x00007feb6161cec1 in apr_pool_destroy (pool=<optimized out>) at ./memory/unix/apr_pools.c:1051
        active = <optimized out>
        allocator = <optimized out>
#14 0x00007feb6161cf00 in apr_pool_terminate () at ./memory/unix/apr_pools.c:728
No locals.
#15 0x00005596bd359cfd in destroy_and_exit_process (process_exit_value=0, process=<optimized out>) at main.c:265
No locals.
#16 0x00005596bd359a82 in main (argc=<optimized out>, argv=<optimized out>) at main.c:805
        c = 0 '\000'
        showcompile = 0
---Type <return> to continue, or q <return> to quit---        showdirectives = 0
        confname = 0x5596bd3a029f "apache2.conf"
        def_server_root = 0x5596bd3a0292 "/etc/apache2"
        temp_error_log = <optimized out>
        error = <optimized out>
        pconf = 0x7feb61eec028
        plog = 0x7feb61ebc028
        ptemp = 0x7feb61ec0028
        pcommands = 0x7feb61ec6028
        opt = 0x7feb61ec6118
        rv = <optimized out>
        mod = <optimized out>
        opt_arg = 0x7feb61eee028 <error: Cannot access memory at address 0x7feb61eee028>
        signal_server = <optimized out>
        rc = 0
(gdb) quit