title: unwind causing segmentation fault
body: <p>I am using backward-cpp (<a href="https://github.com/bombela/backward-cpp" rel="nofollow noreferrer">https://github.com/bombela/backward-cpp</a>) to print the stack trace. However, this gives segmentation fault. Following is the gdb trace of the stack :</p>
  <pre><code>0x00007ffff608e357 in _Unwind_Backtrace () from /lib/x86_64-linux-gnu/libgcc_s.so.1
  (gdb) bt full
  #0  0x00007ffff608e357 in _Unwind_Backtrace () from /lib/x86_64-linux-gnu/libgcc_s.so.1
  No symbol table info available.
  #1  0x000055555567225c in backward::details::Unwinder&lt;backward::StackTraceImpl&lt;backward::system_tag::linux_tag&gt;::callback&gt;::operator() (this=0x7ffff7ee7410, f=..., depth=32)
      at inc/backward.hpp:814
  No locals.
  #2  0x000055555566d66a in backward::details::unwind&lt;backward::StackTraceImpl&lt;backward::system_tag::linux_tag&gt;::callback&gt; (f=..., depth=32) at inc/backward.hpp:857
          unwinder = {_f = 0x7ffff7ee7408, _index = 13, _depth = 32}
  #3  0x00005555556666d2 in backward::StackTraceImpl&lt;backward::system_tag::linux_tag&gt;::load_here (this=0x7ffff7ee74c0, depth=32, context=0x0, error_addr=0x0) at inc/backward.hpp:875
          trace_cnt = 140732520194072
  </code></pre>
  <p>I compiled the code with -g. How can I resolve the issue?</p>