[INFO] cloning repository https://github.com/huangbqsky/study-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/huangbqsky/study-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangbqsky%2Fstudy-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangbqsky%2Fstudy-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b1a69e147f8dad7037bba6b7176fb1111a1a661
[INFO] testing huangbqsky/study-rust against beta-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangbqsky%2Fstudy-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/huangbqsky/study-rust
[INFO] finished tweaking git repo https://github.com/huangbqsky/study-rust
[INFO] tweaked toml for git repo https://github.com/huangbqsky/study-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/huangbqsky/study-rust on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/huangbqsky/study-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e82db7143a3ffb7b882a9ab9952cf9ea761b3bb5f9cd53ae8016c506a7eee6af
[INFO] running `Command { std: "docker" "start" "-a" "e82db7143a3ffb7b882a9ab9952cf9ea761b3bb5f9cd53ae8016c506a7eee6af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e82db7143a3ffb7b882a9ab9952cf9ea761b3bb5f9cd53ae8016c506a7eee6af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e82db7143a3ffb7b882a9ab9952cf9ea761b3bb5f9cd53ae8016c506a7eee6af", kill_on_drop: false }`
[INFO] [stdout] e82db7143a3ffb7b882a9ab9952cf9ea761b3bb5f9cd53ae8016c506a7eee6af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c2f0c8c79faa737481360f14d4392ab980e606948e920c33184921dac186e76
[INFO] running `Command { std: "docker" "start" "-a" "1c2f0c8c79faa737481360f14d4392ab980e606948e920c33184921dac186e76", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
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[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]  --> src/ffi.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern {
[INFO] [stdout]   | ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5m 02s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: xml5ever v0.16.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "1c2f0c8c79faa737481360f14d4392ab980e606948e920c33184921dac186e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c2f0c8c79faa737481360f14d4392ab980e606948e920c33184921dac186e76", kill_on_drop: false }`
[INFO] [stdout] 1c2f0c8c79faa737481360f14d4392ab980e606948e920c33184921dac186e76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 66fa5da43ca4a6b336ce2399f97a82da6c2ba3efc15d2e6c87520341a2b4eb6f
[INFO] running `Command { std: "docker" "start" "-a" "66fa5da43ca4a6b336ce2399f97a82da6c2ba3efc15d2e6c87520341a2b4eb6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> examples/linked_list.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn iter(&self) -> Iter<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] 54 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> examples/linked_list.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn iter_mut(&mut self) -> IterMut<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] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]  --> examples/fn.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let c = || {
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> examples/fn.rs:14:26
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut c1 = move || x += 1;  // 有move却是复制捕获，闭包更自由了，能多次调用还是随便Copy，Fn
[INFO] [stdout]    |                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: did you mean to capture by reference instead?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/fn.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut c = || println!("s is {:?}", s);  // 除了编译器会提供一个多余的mut告警，c还是Fn
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_error_description_deprecated`
[INFO] [stdout]   --> examples/git-log.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout]  6 | / error_chain!{
[INFO] [stdout]  7 | |    foreign_links {
[INFO] [stdout]  8 | |        Io(std::io::Error);
[INFO] [stdout]  9 | |        Regex(regex::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = note: using a cfg inside a macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `impl_error_chain_processed` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = help: the macro `impl_error_chain_processed` may come from an old version of the `error_chain` crate, try updating your dependency with `cargo update -p error_chain`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` which comes from the expansion of the macro `error_chain` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_error_description_deprecated`
[INFO] [stdout]  --> examples/du-cmd.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | / error_chain! {
[INFO] [stdout] 5 | |     foreign_links {
[INFO] [stdout] 6 | |         Io(std::io::Error);
[INFO] [stdout] 7 | |         Utf8(std::string::FromUtf8Error);
[INFO] [stdout] 8 | |     }
[INFO] [stdout] 9 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = note: using a cfg inside a macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]   = help: try referring to `impl_error_chain_processed` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]   = help: the macro `impl_error_chain_processed` may come from an old version of the `error_chain` crate, try updating your dependency with `cargo update -p error_chain`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout]   = note: this warning originates in the macro `impl_error_chain_processed` which comes from the expansion of the macro `error_chain` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]  --> src/ffi.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern {
[INFO] [stdout]   | ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SimpleFuture` is never used
[INFO] [stdout]  --> examples/futures.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | trait SimpleFuture {
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Poll` is never used
[INFO] [stdout]  --> examples/futures.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Poll<T> {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SimpleSocket` is never used
[INFO] [stdout]   --> examples/futures.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | trait SimpleSocket {
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bytes` is never read
[INFO] [stdout]   --> examples/futures.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Socket {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 19 |     bytes: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `socket` is never read
[INFO] [stdout]   --> examples/futures.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct SocketRead<'a> {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 43 |     socket: &'a Socket,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> examples/futures.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub struct Join<FutureA, FutureB> {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 71 |     a: Option<FutureA>,
[INFO] [stdout]    |     ^
[INFO] [stdout] 72 |     b: Option<FutureB>,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first` and `second` are never read
[INFO] [stdout]    --> examples/futures.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 111 | pub struct AndThenFut<FutureA, FutureB> {
[INFO] [stdout]     |            ---------- fields in this struct
[INFO] [stdout] 112 |     first: Option<FutureA>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 113 |     second: FutureB,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `has_error_description_deprecated`
[INFO] [stdout]   --> examples/py-cmd.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout]  7 | / error_chain!{
[INFO] [stdout]  8 | |     errors { CmdError }
[INFO] [stdout]  9 | |     foreign_links {
[INFO] [stdout] 10 | |         Io(std::io::Error);
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = note: using a cfg inside a macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `impl_error_chain_processed` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = help: the macro `impl_error_chain_processed` may come from an old version of the `error_chain` crate, try updating your dependency with `cargo update -p error_chain`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `impl_error_chain_processed` which comes from the expansion of the macro `error_chain` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 9.42s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: xml5ever v0.16.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "66fa5da43ca4a6b336ce2399f97a82da6c2ba3efc15d2e6c87520341a2b4eb6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66fa5da43ca4a6b336ce2399f97a82da6c2ba3efc15d2e6c87520341a2b4eb6f", kill_on_drop: false }`
[INFO] [stdout] 66fa5da43ca4a6b336ce2399f97a82da6c2ba3efc15d2e6c87520341a2b4eb6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fe2c8abd1b0c33b6d92ee8d1639f9b713c99d4d1e4608663207fd855ff558d9a
[INFO] running `Command { std: "docker" "start" "-a" "fe2c8abd1b0c33b6d92ee8d1639f9b713c99d4d1e4608663207fd855ff558d9a", kill_on_drop: false }`
[INFO] [stderr] warning: unexpected `cfg` condition name: `has_error_description_deprecated`
[INFO] [stderr]   --> examples/py-cmd.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr]  7 | / error_chain!{
[INFO] [stderr]  8 | |     errors { CmdError }
[INFO] [stderr]  9 | |     foreign_links {
[INFO] [stderr] 10 | |         Io(std::io::Error);
[INFO] [stderr] ...  |
[INFO] [stderr] 13 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stderr]    = note: using a cfg inside a macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stderr]    = help: try referring to `impl_error_chain_processed` crate for guidance on how handle this unexpected cfg
[INFO] [stderr]    = help: the macro `impl_error_chain_processed` may come from an old version of the `error_chain` crate, try updating your dependency with `cargo update -p error_chain`
[INFO] [stderr]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `impl_error_chain_processed` which comes from the expansion of the macro `error_chain` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `hello_cargo` (example "py-cmd") generated 1 warning
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> examples/linked_list.rs:54:17
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn iter(&self) -> Iter<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] 54 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stderr]    |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> examples/linked_list.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn iter_mut(&mut self) -> IterMut<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] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stderr]    |                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: `hello_cargo` (example "linked_list") generated 2 warnings (run `cargo fix --example "linked_list"` to apply 2 suggestions)
[INFO] [stderr] warning: unexpected `cfg` condition name: `has_error_description_deprecated`
[INFO] [stderr]   --> examples/git-log.rs:6:1
[INFO] [stderr]    |
[INFO] [stderr]  6 | / error_chain!{
[INFO] [stderr]  7 | |    foreign_links {
[INFO] [stderr]  8 | |        Io(std::io::Error);
[INFO] [stderr]  9 | |        Regex(regex::Error);
[INFO] [stderr] ...  |
[INFO] [stderr] 12 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stderr]    = note: using a cfg inside a macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stderr]    = help: try referring to `impl_error_chain_processed` crate for guidance on how handle this unexpected cfg
[INFO] [stderr]    = help: the macro `impl_error_chain_processed` may come from an old version of the `error_chain` crate, try updating your dependency with `cargo update -p error_chain`
[INFO] [stderr]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `impl_error_chain_processed` which comes from the expansion of the macro `error_chain` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait `SimpleFuture` is never used
[INFO] [stderr]  --> examples/futures.rs:2:7
[INFO] [stderr]   |
[INFO] [stderr] 2 | trait SimpleFuture {
[INFO] [stderr]   |       ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Poll` is never used
[INFO] [stderr]  --> examples/futures.rs:7:6
[INFO] [stderr]   |
[INFO] [stderr] 7 | enum Poll<T> {
[INFO] [stderr]   |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `SimpleSocket` is never used
[INFO] [stderr]   --> examples/futures.rs:12:7
[INFO] [stderr]    |
[INFO] [stderr] 12 | trait SimpleSocket {
[INFO] [stderr]    |       ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `bytes` is never read
[INFO] [stderr]   --> examples/futures.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct Socket {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] 19 |     bytes: u8,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `socket` is never read
[INFO] [stderr]   --> examples/futures.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub struct SocketRead<'a> {
[INFO] [stderr]    |            ---------- field in this struct
[INFO] [stderr] 43 |     socket: &'a Socket,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `a` and `b` are never read
[INFO] [stderr]   --> examples/futures.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 68 | pub struct Join<FutureA, FutureB> {
[INFO] [stderr]    |            ---- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 71 |     a: Option<FutureA>,
[INFO] [stderr]    |     ^
[INFO] [stderr] 72 |     b: Option<FutureB>,
[INFO] [stderr]    |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `first` and `second` are never read
[INFO] [stderr]    --> examples/futures.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 111 | pub struct AndThenFut<FutureA, FutureB> {
[INFO] [stderr]     |            ---------- fields in this struct
[INFO] [stderr] 112 |     first: Option<FutureA>,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 113 |     second: FutureB,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stderr]  --> src/ffi.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | extern {
[INFO] [stderr]   | ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(missing_abi)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition name: `has_error_description_deprecated`
[INFO] [stderr]  --> examples/du-cmd.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / error_chain! {
[INFO] [stderr] 5 | |     foreign_links {
[INFO] [stderr] 6 | |         Io(std::io::Error);
[INFO] [stderr] 7 | |         Utf8(std::string::FromUtf8Error);
[INFO] [stderr] 8 | |     }
[INFO] [stderr] 9 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stderr]   = note: using a cfg inside a macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stderr]   = help: try referring to `impl_error_chain_processed` crate for guidance on how handle this unexpected cfg
[INFO] [stderr]   = help: the macro `impl_error_chain_processed` may come from an old version of the `error_chain` crate, try updating your dependency with `cargo update -p error_chain`
[INFO] [stderr]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr]   = note: this warning originates in the macro `impl_error_chain_processed` which comes from the expansion of the macro `error_chain` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `hello_cargo` (example "git-log") generated 1 warning
[INFO] [stderr] warning: `hello_cargo` (example "futures") generated 7 warnings
[INFO] [stderr] warning: `hello_cargo` (bin "hello_cargo" test) generated 1 warning (run `cargo fix --bin "hello_cargo" --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `hello_cargo` (example "du-cmd") generated 1 warning
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]  --> examples/fn.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let c = || {
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> examples/fn.rs:14:26
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut c1 = move || x += 1;  // 有move却是复制捕获，闭包更自由了，能多次调用还是随便Copy，Fn
[INFO] [stderr]    |                          ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: did you mean to capture by reference instead?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/fn.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let mut c = || println!("s is {:?}", s);  // 除了编译器会提供一个多余的mut告警，c还是Fn
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `hello_cargo` (example "fn") generated 3 warnings (run `cargo fix --example "fn"` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: xml5ever v0.16.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/hello_cargo-201e60869023461e)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hello_cargo-968e495eff26c382)
[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 3 tests
[INFO] [stdout] test list::tests::test_list ... ok
[INFO] [stdout] test stack::test::walk_aboot ... ok
[INFO] [stdout] test parse::parse_should_work ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hello_cargo
[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" "fe2c8abd1b0c33b6d92ee8d1639f9b713c99d4d1e4608663207fd855ff558d9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe2c8abd1b0c33b6d92ee8d1639f9b713c99d4d1e4608663207fd855ff558d9a", kill_on_drop: false }`
[INFO] [stdout] fe2c8abd1b0c33b6d92ee8d1639f9b713c99d4d1e4608663207fd855ff558d9a
