From f4af8c40e5a5aa8f4558c6354e64e56b09018e9e Mon Sep 17 00:00:00 2001
From: Joseph Wright <joseph.wright@morningstar2.co.uk>
Date: Sun, 15 Dec 2019 21:15:09 +0000
Subject: [PATCH] Support \smash

---
 l3kernel/l3text.dtx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/l3kernel/l3text.dtx b/l3kernel/l3text.dtx
index 5ce2e31148..65df17adc1 100644
--- a/l3kernel/l3text.dtx
+++ b/l3kernel/l3text.dtx
@@ -3646,6 +3646,7 @@
 %   {
 %     \@@_purify_unimath_\mbox:nw       ,
 %     \@@_purify_unimath_\hbox:nw       ,
+%     \@@_purify_unimath_\smash:nw      ,
 %     \@@_purify_unimath_\text:nw       ,
 %     \@@_purify_unimath_\textrm:nw     ,
 %     \@@_purify_unimath_\textsf:nw     ,
@@ -3671,6 +3672,7 @@
 \tl_map_inline:nn
   {
     \hbox
+    \smash
     \text
     \textrm
     \textsf