I am sponsiring a NMU to fix this.
The debdiff is attached.
diff -Nru yubioath-desktop-5.1.0/debian/changelog
yubioath-desktop-5.1.0/debian/changelog
--- yubioath-desktop-5.1.0/debian/changelog 2022-02-11 15:59:17.000000000
+0100
+++ yubioath-desktop-5.1.0/debian/changelog 2023-09-17 16:29:46.000000000
+0200
@@ -1,3 +1,11 @@
+yubioath-desktop (5.1.0-1.1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Add 02-fix-gcc-13 patch to fix gcc-13 build issue, thanks
+ Jonathan Bergh <bergh.jonat...@gmail.com> also. (Closes: #1037909)
+
+ -- Bo YU <tsu.y...@gmail.com> Sun, 17 Sep 2023 22:29:46 +0800
+
yubioath-desktop (5.1.0-1) unstable; urgency=medium
* new upstream version 5.1.0
diff -Nru yubioath-desktop-5.1.0/debian/patches/02-fix-gcc-13.patch
yubioath-desktop-5.1.0/debian/patches/02-fix-gcc-13.patch
--- yubioath-desktop-5.1.0/debian/patches/02-fix-gcc-13.patch 1970-01-01
01:00:00.000000000 +0100
+++ yubioath-desktop-5.1.0/debian/patches/02-fix-gcc-13.patch 2023-09-17
16:29:27.000000000 +0200
@@ -0,0 +1,18 @@
+Description: fix gcc-13 build issue
+ Due to the upstream has beed renamed(6.0.0) and it seems the code has been
+ refactored, so do not forward it.
+Author: Bo YU <tsu.y...@gmail.com>
+Bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1037909
+Last-Update: 2023-07-24
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- a/QZXing/zxing/zxing/common/Types.h
++++ b/QZXing/zxing/zxing/common/Types.h
+@@ -2,6 +2,7 @@
+ #ifndef ZXING_TYPES_H
+ #define ZXING_TYPES_H
+
++#include <cstdint>
+ #include <string>
+ #include <iostream>
+ #include <zxing/common/Counted.h>
diff -Nru yubioath-desktop-5.1.0/debian/patches/series
yubioath-desktop-5.1.0/debian/patches/series
--- yubioath-desktop-5.1.0/debian/patches/series 2022-02-11
15:59:38.000000000 +0100
+++ yubioath-desktop-5.1.0/debian/patches/series 2023-09-17
16:16:17.000000000 +0200
@@ -1 +1,2 @@
01-fix_target_path
+02-fix-gcc-13.patch
