s, see <a href="https://callr.r-lib.org/reference/r_bg.html"><code>callr::r_bg()</code></a>
and <a href="https://callr.r-lib.org/reference/r_process.html"><code>callr::r_process()</code></a> for one-off and <a href="https://callr.r-lib.org/reference/r_session.html"><code>callr::r_session()</code></a> for persistent
background R processes.</p>
<div id="callr-error-objects" class="section level2">
<h2>callr error objects</h2>
<p>Debugging code running in a background process is notoriously difficult.
Most of 