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 (envelope-from &lt;sanvila@debian.org&gt;) id 1wOHVf-000ASj-2w
 for submit@bugs.debian.org; Sat, 16 May 2026 16:05:03 +0000
From: Santiago Vila &lt;sanvila@debian.org&gt;
To: Debian BTS &lt;submit@bugs.debian.org&gt;
Subject: mousai: FTBFS: error[E0277]: can't compare `auto::path::Path` with
 `auto::path::Path`
X-Debbugs-Cc: sanvila@debian.org
Message-Id: &lt;E1wOHVf-000ASj-2w@paradis.debian.org&gt;
Date: Sat, 16 May 2026 16:05:03 +0000
Delivered-To: submit@bugs.debian.org

Package: src:mousai
Version: 0.7.9-5
Severity: serious
Tags: ftbfs forky sid

Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202605/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:mousai, so that this is still
visible in the BTS web page for this package.

Thanks.

--------------------------------------------------------------------------------
[...]
 debian/rules clean
dh clean
   debian/rules execute_after_dh_auto_clean
make[1]: Entering directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
rm -rf debian/cargo_registry
make[1]: Leaving directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
   dh_clean
 debian/rules binary
dh binary
   dh_update_autotools_config
   dh_autoreconf
   debian/rules override_dh_auto_configure
make[1]: Entering directory '/&lt;&lt;PKGBUILDDIR&gt;&gt;'
/usr/share/cargo/bin/cargo prepare-debian debian/cargo_registry --link-from-system
debian cargo wrapper: options = ['parallel=2'], profiles = [], parallel = ['-j2'], lto = 

[... snipped ...]

1332 |     #[cfg(feature = &quot;v4_22&quot;)]
     |           ^^^^^^^^^^-------
     |                     |
     |                     help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1336:11
     |
1336 |     #[cfg(feature = &quot;v4_22&quot;)]
     |           ^^^^^^^^^^-------
     |                     |
     |                     help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1340:11
     |
1340 |     #[cfg(feature = &quot;v4_22&quot;)]
     |           ^^^^^^^^^^-------
     |                     |
     |                     help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1344:11
     |
1344 |     #[cfg(feature = &quot;v4_22&quot;)]
     |           ^^^^^^^^^^-------
     |                     |
     |                     help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1348:11
     |
1348 |     #[cfg(feature = &quot;v4_22&quot;)]
     |           ^^^^^^^^^^-------
     |                     |
     |                     help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1400:19
     |
1400 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1402:19
     |
1402 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1404:19
     |
1404 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1406:19
     |
1406 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1408:19
     |
1408 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1410:19
     |
1410 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1461:19
     |
1461 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1463:19
     |
1463 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1465:19
     |
1465 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1467:19
     |
1467 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1469:19
     |
1469 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: unexpected `cfg` condition value: `v4_22`
    --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/enums.rs:1471:19
     |
1471 |             #[cfg(feature = &quot;v4_22&quot;)]
     |                   ^^^^^^^^^^-------
     |                             |
     |                             help: there is a expected value with a similar name: `&quot;v4_20&quot;`
     |
     = note: expected values for `feature` are: `broadway`, `v4_10`, `v4_14`, `v4_16`, `v4_18`, `v4_2`, `v4_20`, `v4_4`, `v4_6`, and `vulkan`
     = help: consider adding `v4_22` as a feature in `Cargo.toml`
     = note: see &lt;https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html&gt; for more information about checking conditional configuration

warning: field `struct_` is never read
   --&gt; /&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/cargo_registry/deluxe-macros-0.5.0/types/struct.rs:106:9
    |
105 | pub struct Struct&lt;'s&gt; {
    |            ------ field in this struct
106 |     pub struct_: &amp;'s syn::DataStruct,
    |         ^^^^^^^
    |
    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default

warning: field `enum_` is never read
  --&gt; /&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/cargo_registry/deluxe-macros-0.5.0/types/enum.rs:12:9
   |
11 | pub struct Enum&lt;'e&gt; {
   |            ---- field in this struct
12 |     pub enum_: &amp;'e syn::DataEnum,
   |         ^^^^^

warning: hiding a lifetime that's elided elsewhere is confusing
  --&gt; /&lt;&lt;PKGBUILDDIR&gt;&gt;/debian/cargo_registry/deluxe-macros-0.5.0/types/field.rs:19:20
   |
19 |     pub fn to_expr(&amp;self, ty: Option&lt;&amp;syn::Type&gt;, priv_: &amp;syn::Path) -&gt; Cow&lt;TokenStream&gt; {
   |                    ^^^^^ the lifetime is elided here                    ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
   |
   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
help: use `'_` for type paths
   |
19 |     pub fn to_expr(&amp;self, ty: Option&lt;&amp;syn::Type&gt;, priv_: &amp;syn::Path) -&gt; Cow&lt;'_, TokenStream&gt; {
   |                                                                             +++

error[E0277]: can't compare `auto::path::Path` with `auto::path::Path`
  --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/path.rs:9:21
   |
 9 |     #[derive(Debug, PartialOrd, Ord, Hash)]
   |                     ^^^^^^^^^^ no implementation for `auto::path::Path == auto::path::Path`
   |
   = help: the trait `PartialEq` is not implemented for `auto::path::Path`
note: required by a bound in `PartialOrd`
  --&gt; /usr/src/rustc-1.94.1/library/core/src/cmp.rs:1358:0
help: consider annotating `auto::path::Path` with `#[derive(PartialEq)]`
  --&gt; /usr/share/cargo/registry/glib-0.21.5/src/shared.rs:35:1
   |
35 +         #[derive(PartialEq)]
36 |         $visibility struct $name $(&lt;$($generic $(: $bound $(+ $bound2)*)?),+&gt;)? {
   |

error[E0277]: the trait bound `auto::path::Path: std::cmp::Eq` is not satisfied
  --&gt; /usr/share/cargo/registry/gsk4-0.10.3/src/auto/path.rs:9:33
   |
 9 |     #[derive(Debug, PartialOrd, Ord, Hash)]
   |                                 ^^^ the trait `std::cmp::Eq` is not implemented for `auto::path::Path`
   |
note: required by a bound in `Ord`
  --&gt; /usr/src/rustc-1.94.1/library/core/src/cmp.rs:973:0
help: consider annotating `auto::path::Path` with `#[derive(Eq)]`
  --&gt; /usr/share/cargo/registry/glib-0.21.5/src/shared.rs:35:1
   |
35 +         #[derive(Eq)]
36 |         $visibility struct $name $(&lt;$($generic $(: $bound $(+ $bound2)*)?),+&gt;)? {
   |

For more information about this error, try `rustc --explain E0277`.
warning: `gsk4` (lib) generated 23 warnings
error: could not compile `gsk4` (lib) due to 2 previous errors; 23 warnings emitted

Caused by:
  process didn't exit successfully: `CARGO=/usr/bin/cargo CA [too-long-redacted] argo/registry` (exit status: 1)
warning: build failed, waiting for other jobs to finish...
warning: `deluxe-macros` (lib) generated 3 warnings
[47/48] /usr/bin/msgfmt -o po/ga/LC_MESSAGES/mousai.mo ../po/ga.po
FAILED: [code=101] src/mousai 
/usr/bin/env /usr/share/cargo/bin/cargo build --manifest-path /&lt;&lt;PKGBUILDDIR&gt;&gt;/Cargo.toml --target-dir /&lt;&lt;PKGBUILDDIR&gt;&gt;/obj-x86_64-linux-gnu/src --release &amp;&amp; cp src/x86_64-unknown-linux-gnu/release/mousai src/mousai
ninja: build stopped: subcommand failed.
dh_auto_build: error: cd obj-x86_64-linux-gnu &amp;&amp; LC_ALL=C.UTF-8 ninja -j2 -v returned exit code 101
make: *** [debian/rules:14: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
--------------------------------------------------------------------------------
]