diff -Nru rust-mbox-0.6.0/debian/changelog rust-mbox-0.6.0/debian/changelog
--- rust-mbox-0.6.0/debian/changelog	2023-08-09 13:35:57.000000000 +0000
+++ rust-mbox-0.6.0/debian/changelog	2023-08-14 08:12:25.000000000 +0000
@@ -1,3 +1,10 @@
+rust-mbox (0.6.0-2) unstable; urgency=medium
+
+  * Package mbox 0.6.0 from crates.io using debcargo 2.6.0
+  * Fix tests on architectures where char is unsigned (Closes: #1043597)
+
+ -- Emanuele Rocca <ema@debian.org>  Mon, 14 Aug 2023 10:12:25 +0200
+
 rust-mbox (0.6.0-1) unstable; urgency=medium
 
   * Package mbox 0.6.0 from crates.io using debcargo 2.6.0
diff -Nru rust-mbox-0.6.0/debian/patches/fix-ftbfs-unsigned-char.diff rust-mbox-0.6.0/debian/patches/fix-ftbfs-unsigned-char.diff
--- rust-mbox-0.6.0/debian/patches/fix-ftbfs-unsigned-char.diff	1970-01-01 00:00:00.000000000 +0000
+++ rust-mbox-0.6.0/debian/patches/fix-ftbfs-unsigned-char.diff	2023-08-14 08:12:25.000000000 +0000
@@ -0,0 +1,35 @@
+From 82ab7559203a434a159d54f42b59ce9c901f7055 Mon Sep 17 00:00:00 2001
+From: Mads Marquart <mads@marquart.dk>
+Date: Tue, 23 Nov 2021 22:28:57 +0100
+Subject: [PATCH] Fix tests on targets where c_char = u8
+
+---
+ src/sentinel.rs | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/sentinel.rs b/src/sentinel.rs
+index d765d50..2265be5 100644
+--- a/src/sentinel.rs
++++ b/src/sentinel.rs
+@@ -328,9 +328,9 @@ fn test_string() {
+     unsafe {
+         let src = gen_malloc::<c_char>(5).as_ptr();
+         *src.offset(0) = 0x61;
+-        *src.offset(1) = -0x19;
+-        *src.offset(2) = -0x6c;
+-        *src.offset(3) = -0x4e;
++        *src.offset(1) = -0x19i8 as c_char;
++        *src.offset(2) = -0x6ci8 as c_char;
++        *src.offset(3) = -0x4ei8 as c_char;
+         *src.offset(4) = 0;
+ 
+         let string = MString::from_raw_unchecked(src);
+@@ -342,7 +342,7 @@ fn test_string() {
+ fn test_non_utf8_string() {
+     unsafe {
+         let src = gen_malloc::<c_char>(2).as_ptr();
+-        *src.offset(0) = -1;
++        *src.offset(0) = -1i8 as c_char;
+         *src.offset(1) = 0;
+ 
+         let string = MString::from_raw(src);
diff -Nru rust-mbox-0.6.0/debian/patches/series rust-mbox-0.6.0/debian/patches/series
--- rust-mbox-0.6.0/debian/patches/series	2023-08-09 13:35:57.000000000 +0000
+++ rust-mbox-0.6.0/debian/patches/series	2023-08-14 08:12:25.000000000 +0000
@@ -1 +1,2 @@
 no-rustc-version.diff
+fix-ftbfs-unsigned-char.diff