<p>okay sneaking a compatibility check in `Deref` for `CowStr` seems to do the trick — not sure how that feature got flipped on in one of my crates but oh well.</p><p>this is rubicon's beautiful "ABI's fucked" check btw: <a href="https://docs.rs/rubicon/latest/rubicon/macro.compatibility_check.html" target="_blank" rel="nofollow noopener noreferrer" translate="no"><span class="invisible">https://</span><span class="ellipsis">docs.rs/rubicon/latest/rubicon</span><span class="invisible">/macro.compatibility_check.html</span></a></p>
