l 32&gt;: eng_r(options)] </span>
<span class="co"># [&lt;R call 33&gt;: block_exec(params)] </span>
<span class="co"># [&lt;R call 34&gt;: call_block(x)] </span>
<span class="co"># [&lt;R call 35&gt;: process_group.block(group)] </span>
<span class="co"># [&lt;R call 36&gt;: process_group(group)] </span>
<span class="co"># [&lt;R call 37&gt;: withCallingHandlers(if (tangle) process_tangle(group) else process_group(group), error = function(e) {] </span>
<span class="co"># [&lt;R call 38&gt;: process_file(te