[INFO] fetching crate daemon 0.0.8...
[INFO] testing daemon-0.0.8 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate daemon 0.0.8 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate daemon 0.0.8
[INFO] finished tweaking crates.io crate daemon 0.0.8
[INFO] tweaked toml for crates.io crate daemon 0.0.8 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate daemon 0.0.8 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to highest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `daemon` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d
[INFO] running `Command { std: "docker" "start" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `daemon` (manifest) generated 1 warning
[INFO] [stderr]    Compiling daemon v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         try!(guard_compare_and_swap(daemon_null(), &mut daemon));
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         try!(guard_compare_and_swap(&mut daemon, daemon_null()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linux::*`
[INFO] [stdout]   --> src/lib.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub use linux::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]   --> src/singleton.rs:38:59
[INFO] [stdout]    |
[INFO] [stdout] 38 |               static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout]    |                                                             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/linux.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout]  9 | / declare_singleton!(
[INFO] [stdout] 10 | |     singleton,
[INFO] [stdout] 11 | |     DaemonHolder,
[INFO] [stdout] 12 | |     DaemonHolder {
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `declare_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: replace the use of the deprecated constant
[INFO] [stdout]    |
[INFO] [stdout] 38 -             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout] 38 +             static ONCE: ::std::sync::Once = ::std::sync::Once::new();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/linux.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |     holder: Box<DaemonFunc>,
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     holder: Box<dyn DaemonFunc>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/linux.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]    --> src/linux.rs:125:42
[INFO] [stdout]     |
[INFO] [stdout] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stdout]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `send` and `take_tx` are never used
[INFO] [stdout]   --> src/linux.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | trait DaemonFunc {
[INFO] [stdout]    |       ---------- methods in this trait
[INFO] [stdout] 26 |     fn exec(&mut self) -> Result<(), Error>;
[INFO] [stdout] 27 |     fn send(&mut self, state: State) -> Result<(), Error>;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 28 |     fn take_tx(&mut self) -> Option<Sender<State>>;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tx` is never read
[INFO] [stdout]   --> src/linux.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct DaemonFuncHolder<F: FnOnce(Receiver<State>)> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 32 |     tx: Option<Sender<State>>,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `signal_handler` is never used
[INFO] [stdout]    --> src/linux.rs:125:27
[INFO] [stdout]     |
[INFO] [stdout] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `raise` is never used
[INFO] [stdout]    --> src/linux.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn raise(sig: libc::c_int) -> libc::c_int;
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `signal` is never used
[INFO] [stdout]    --> src/linux.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn signal(sig: libc::c_int, handler: *const libc::c_void) -> libc::c_int;
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `kill` is never used
[INFO] [stdout]    --> src/linux.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 144 |     fn kill(pid: libc::pid_t, sig: libc::c_int) -> libc::c_int;
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/singleton.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<T>> {
[INFO] [stdout]    |                 ^^^^^                ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<'_, T>> {
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `daemon` (manifest) generated 1 warning
[INFO] [stderr]    Compiling daemon v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         try!(guard_compare_and_swap(daemon_null(), &mut daemon));
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         try!(guard_compare_and_swap(&mut daemon, daemon_null()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linux::*`
[INFO] [stdout]   --> src/lib.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub use linux::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]   --> src/singleton.rs:38:59
[INFO] [stdout]    |
[INFO] [stdout] 38 |               static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout]    |                                                             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/linux.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout]  9 | / declare_singleton!(
[INFO] [stdout] 10 | |     singleton,
[INFO] [stdout] 11 | |     DaemonHolder,
[INFO] [stdout] 12 | |     DaemonHolder {
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `declare_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: replace the use of the deprecated constant
[INFO] [stdout]    |
[INFO] [stdout] 38 -             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout] 38 +             static ONCE: ::std::sync::Once = ::std::sync::Once::new();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/linux.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |     holder: Box<DaemonFunc>,
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     holder: Box<dyn DaemonFunc>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/linux.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]    --> src/linux.rs:125:42
[INFO] [stdout]     |
[INFO] [stdout] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stdout]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `send` and `take_tx` are never used
[INFO] [stdout]   --> src/linux.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | trait DaemonFunc {
[INFO] [stdout]    |       ---------- methods in this trait
[INFO] [stdout] 26 |     fn exec(&mut self) -> Result<(), Error>;
[INFO] [stdout] 27 |     fn send(&mut self, state: State) -> Result<(), Error>;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 28 |     fn take_tx(&mut self) -> Option<Sender<State>>;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tx` is never read
[INFO] [stdout]   --> src/linux.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct DaemonFuncHolder<F: FnOnce(Receiver<State>)> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 32 |     tx: Option<Sender<State>>,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `signal_handler` is never used
[INFO] [stdout]    --> src/linux.rs:125:27
[INFO] [stdout]     |
[INFO] [stdout] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `raise` is never used
[INFO] [stdout]    --> src/linux.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn raise(sig: libc::c_int) -> libc::c_int;
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `signal` is never used
[INFO] [stdout]    --> src/linux.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn signal(sig: libc::c_int, handler: *const libc::c_void) -> libc::c_int;
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `kill` is never used
[INFO] [stdout]    --> src/linux.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 144 |     fn kill(pid: libc::pid_t, sig: libc::c_int) -> libc::c_int;
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/singleton.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<T>> {
[INFO] [stdout]    |                 ^^^^^                ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<'_, T>> {
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         try!(guard_compare_and_swap(daemon_null(), &mut daemon));
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/linux.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         try!(guard_compare_and_swap(&mut daemon, daemon_null()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linux::*`
[INFO] [stdout]   --> src/lib.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub use linux::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]   --> src/singleton.rs:38:59
[INFO] [stdout]    |
[INFO] [stdout] 38 |             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout]    |                                                           ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |         declare_singleton!(simple_singleton, u32, 0);
[INFO] [stdout]    |         -------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `declare_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: replace the use of the deprecated constant
[INFO] [stdout]    |
[INFO] [stdout] 38 -             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout] 38 +             static ONCE: ::std::sync::Once = ::std::sync::Once::new();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stdout]   --> src/singleton.rs:38:59
[INFO] [stdout]    |
[INFO] [stdout] 38 |               static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout]    |                                                             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/linux.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout]  9 | / declare_singleton!(
[INFO] [stdout] 10 | |     singleton,
[INFO] [stdout] 11 | |     DaemonHolder,
[INFO] [stdout] 12 | |     DaemonHolder {
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `declare_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: replace the use of the deprecated constant
[INFO] [stdout]    |
[INFO] [stdout] 38 -             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stdout] 38 +             static ONCE: ::std::sync::Once = ::std::sync::Once::new();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/linux.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |     holder: Box<DaemonFunc>,
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     holder: Box<dyn DaemonFunc>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/linux.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]    --> src/linux.rs:125:42
[INFO] [stdout]     |
[INFO] [stdout] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stdout]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `send` and `take_tx` are never used
[INFO] [stdout]   --> src/linux.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | trait DaemonFunc {
[INFO] [stdout]    |       ---------- methods in this trait
[INFO] [stdout] 26 |     fn exec(&mut self) -> Result<(), Error>;
[INFO] [stdout] 27 |     fn send(&mut self, state: State) -> Result<(), Error>;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 28 |     fn take_tx(&mut self) -> Option<Sender<State>>;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tx` is never read
[INFO] [stdout]   --> src/linux.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct DaemonFuncHolder<F: FnOnce(Receiver<State>)> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 32 |     tx: Option<Sender<State>>,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `signal_handler` is never used
[INFO] [stdout]    --> src/linux.rs:125:27
[INFO] [stdout]     |
[INFO] [stdout] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `raise` is never used
[INFO] [stdout]    --> src/linux.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn raise(sig: libc::c_int) -> libc::c_int;
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `signal` is never used
[INFO] [stdout]    --> src/linux.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn signal(sig: libc::c_int, handler: *const libc::c_void) -> libc::c_int;
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `kill` is never used
[INFO] [stdout]    --> src/linux.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 144 |     fn kill(pid: libc::pid_t, sig: libc::c_int) -> libc::c_int;
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/singleton.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<T>> {
[INFO] [stdout]    |                 ^^^^^                ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<'_, T>> {
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--release", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `daemon` (manifest) generated 1 warning
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/linux.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |         try!(guard_compare_and_swap(daemon_null(), &mut daemon));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/linux.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         try!(guard_compare_and_swap(&mut daemon, daemon_null()));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `linux::*`
[INFO] [stderr]   --> src/lib.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub use linux::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stderr]   --> src/singleton.rs:38:59
[INFO] [stderr]    |
[INFO] [stderr] 38 |               static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stderr]    |                                                             ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]   ::: src/linux.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr]  9 | / declare_singleton!(
[INFO] [stderr] 10 | |     singleton,
[INFO] [stderr] 11 | |     DaemonHolder,
[INFO] [stderr] 12 | |     DaemonHolder {
[INFO] [stderr] ...  |
[INFO] [stderr] 15 | | );
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `declare_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: replace the use of the deprecated constant
[INFO] [stderr]    |
[INFO] [stderr] 38 -             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stderr] 38 +             static ONCE: ::std::sync::Once = ::std::sync::Once::new();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/linux.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |     holder: Box<DaemonFunc>,
[INFO] [stderr]    |                 ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 22 |     holder: Box<dyn DaemonFunc>,
[INFO] [stderr]    |                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/linux.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     unsafe {
[INFO] [stderr]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sig`
[INFO] [stderr]    --> src/linux.rs:125:42
[INFO] [stderr]     |
[INFO] [stderr] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stderr]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: methods `send` and `take_tx` are never used
[INFO] [stderr]   --> src/linux.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | trait DaemonFunc {
[INFO] [stderr]    |       ---------- methods in this trait
[INFO] [stderr] 26 |     fn exec(&mut self) -> Result<(), Error>;
[INFO] [stderr] 27 |     fn send(&mut self, state: State) -> Result<(), Error>;
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 28 |     fn take_tx(&mut self) -> Option<Sender<State>>;
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `tx` is never read
[INFO] [stderr]   --> src/linux.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | struct DaemonFuncHolder<F: FnOnce(Receiver<State>)> {
[INFO] [stderr]    |        ---------------- field in this struct
[INFO] [stderr] 32 |     tx: Option<Sender<State>>,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `signal_handler` is never used
[INFO] [stderr]    --> src/linux.rs:125:27
[INFO] [stderr]     |
[INFO] [stderr] 125 | unsafe extern "system" fn signal_handler(sig: libc::c_int) {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `raise` is never used
[INFO] [stderr]    --> src/linux.rs:142:8
[INFO] [stderr]     |
[INFO] [stderr] 142 |     fn raise(sig: libc::c_int) -> libc::c_int;
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `signal` is never used
[INFO] [stderr]    --> src/linux.rs:143:8
[INFO] [stderr]     |
[INFO] [stderr] 143 |     fn signal(sig: libc::c_int, handler: *const libc::c_void) -> libc::c_int;
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `kill` is never used
[INFO] [stderr]    --> src/linux.rs:144:8
[INFO] [stderr]     |
[INFO] [stderr] 144 |     fn kill(pid: libc::pid_t, sig: libc::c_int) -> libc::c_int;
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/singleton.rs:19:17
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<T>> {
[INFO] [stderr]    |                 ^^^^^                ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn lock(&self) -> LockResult<MutexGuard<'_, T>> {
[INFO] [stderr]    |                                                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: `daemon` (lib) generated 14 warnings (run `cargo fix --lib -p daemon` to apply 5 suggestions)
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `Once::new()` function is now preferred
[INFO] [stderr]   --> src/singleton.rs:38:59
[INFO] [stderr]    |
[INFO] [stderr] 38 |             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stderr]    |                                                           ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 61 |         declare_singleton!(simple_singleton, u32, 0);
[INFO] [stderr]    |         -------------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `declare_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: replace the use of the deprecated constant
[INFO] [stderr]    |
[INFO] [stderr] 38 -             static ONCE: ::std::sync::Once = ::std::sync::ONCE_INIT;
[INFO] [stderr] 38 +             static ONCE: ::std::sync::Once = ::std::sync::Once::new();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `daemon` (lib test) generated 15 warnings (14 duplicates) (run `cargo fix --lib -p daemon --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/release/deps/daemon-1d883ffba8862594)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test singleton::test::smoke_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/example.rs (/opt/rustwide/target/release/deps/example-c4dc5618b530e547)
[INFO] [stderr]    Doc-tests daemon
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d", kill_on_drop: false }`
[INFO] [stdout] f18250d68cecf1fe8a112595ede4ba86a39c16f93ea345280f83f9c3a6e9180d
