am</code>.</p>
<p>This setting is implied if <code>proc-macro-hack</code> was detected.</p>
</li>
<li>
<p><code>assert_unwind_safe</code>:</p>
<p>By default, your code must be <a href="https://doc.rust-lang.org/std/panic/trait.UnwindSafe.html#what-is-unwind-safety">unwind safe</a>. If your code is not unwind safe,
but you believe it's correct, you can use this setting to bypass the check.
You would need this for code that uses <code>lazy_static</code> or <code>thread_local</code> with
<code>Cell/RefCell</co