<h3>Description</h3>
<p>If var is encoded with <code>base58</code>, it can't be restored via <code>s.decode.base58</code></p>
<h4>Reproduction</h4>
<pre><code>request_route {
  route(TEST_BASE58);
}

route[TEST_BASE58] {
  $var(test_var) = "This is a text";
  $var(test_var_encode_base58) = $(var(test_var){s.encode.base58});
  $var(test_var_decode_base58) = $(var(test_var_encode_base58){s.decode.base58});
  xlog("L_ALERT", "[BASE58 TEST] $var(test_var) -> $var(test_var_encode_base58) -> $var(test_var_decode_base58) \n");

}

</code></pre>
<h4>Log Messages</h4>

<p>2 messages just to show, that var is not restored</p>
<pre><code>44(60) ALERT: <script>: [BASE58 TEST] This is a text -> Y2oxCuAXwVJduYPTnFd -> 14(30) ALERT: <script>: [BASE58 TEST] This is a text -> Y2oxCuAXwVJduYPTnFd ->
</code></pre>
<h3>Additional Information</h3>
<ul>
<li><strong>Kamailio Version</strong> - output of <code>kamailio -v</code></li>
</ul>
<pre><code>version: kamailio 5.2.0 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144 MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled with gcc 5.3.1
</code></pre>
<ul>
<li><strong>Operating System</strong>:</li>
</ul>
<pre><code>4.4.0-135-generic #161-Ubuntu SMP Mon Aug 27 10:45:01 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
</code></pre>

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