ist(expr, names[-nh], parentenv, handlers[-nh])] </span>
<span class="co"># [&lt;R call 41&gt;: doTryCatch(return(expr), name, parentenv, handler)] </span>
<span class="co"># [&lt;R call 42&gt;: tryCatchOne(tryCatchList(expr, names[-nh], parentenv, handlers[-nh]), names[nh], parentenv, handlers[[nh]])] </span>
<span class="co"># [&lt;R call 43&gt;: tryCatchList(expr, classes, parentenv, handlers)] </span>
<span class="co"># [&lt;R call 44&gt;: tryCatch(withCallingHandlers({]</span>
<span class="co">#&gt;   