[INFO] cloning repository https://github.com/mmacedoeu/toyrpc.rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mmacedoeu/toyrpc.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmacedoeu%2Ftoyrpc.rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmacedoeu%2Ftoyrpc.rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 17dcf9a2552b743750c32579c2d43b27327d0c30 [INFO] checking mmacedoeu/toyrpc.rs against try#0bdee9e879c87b7211d316e9152109cfd46c576b for pr-150097 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmacedoeu%2Ftoyrpc.rs" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/mmacedoeu/toyrpc.rs [INFO] finished tweaking git repo https://github.com/mmacedoeu/toyrpc.rs [INFO] tweaked toml for git repo https://github.com/mmacedoeu/toyrpc.rs written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/mmacedoeu/toyrpc.rs on toolchain 0bdee9e879c87b7211d316e9152109cfd46c576b [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/mmacedoeu/toyrpc.rs 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" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Updating git repository `https://github.com/paritytech/jsonrpc.git` [INFO] [stderr] Updating git repository `https://github.com/ethcore/mio` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Locking 5 packages to latest compatible versions [INFO] [stderr] Adding jsonrpc-core v8.0.2 (https://github.com/paritytech/jsonrpc.git?branch=master#029a0696) [INFO] [stderr] Adding jsonrpc-http-server v8.0.1 (https://github.com/paritytech/jsonrpc.git?branch=master#029a0696) [INFO] [stderr] Adding jsonrpc-macros v8.0.1 (https://github.com/paritytech/jsonrpc.git?branch=master#029a0696) [INFO] [stderr] Adding jsonrpc-pubsub v8.0.1 (https://github.com/paritytech/jsonrpc.git?branch=master#029a0696) [INFO] [stderr] Adding jsonrpc-server-utils v8.0.1 (https://github.com/paritytech/jsonrpc.git?branch=master#029a0696) [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... 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mime v0.3.7 [INFO] [stderr] Downloaded smallvec v0.2.1 [INFO] [stderr] Downloaded clippy_lints v0.0.103 [INFO] [stderr] Downloaded globset v0.4.0 [INFO] [stderr] Downloaded number_prefix v0.2.8 [INFO] [stderr] Downloaded net2 v0.2.32 [INFO] [stderr] Downloaded tokio-reactor v0.1.1 [INFO] [stderr] Downloaded parking_lot v0.3.8 [INFO] [stderr] Downloaded serde v1.0.55 [INFO] [stderr] Downloaded take v0.1.0 [INFO] [stderr] Downloaded tokio-fs v0.1.0 [INFO] [stderr] Downloaded relay v0.1.1 [INFO] [stderr] Downloaded try-lock v0.1.0 [INFO] [stderr] Downloaded base32 v0.3.1 [INFO] [stderr] Downloaded want v0.0.4 [INFO] [stderr] Downloaded cfg-if v0.1.3 [INFO] [stderr] Downloaded stable_deref_trait v1.0.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 5acd0d9e5b80ea78fee4ca23fe374af09fe3144ab6eabda3a045a319f86691b1 [INFO] running `Command { std: "docker" "start" "-a" "5acd0d9e5b80ea78fee4ca23fe374af09fe3144ab6eabda3a045a319f86691b1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" 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"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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b6f63ee5bb6542685a102646f3b7529a2c92e47115ba2b273afb7c50ebfb68e0 [INFO] running `Command { std: "docker" "start" "-a" "b6f63ee5bb6542685a102646f3b7529a2c92e47115ba2b273afb7c50ebfb68e0", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Checking cfg-if v0.1.3 [INFO] [stderr] Checking futures v0.1.21 [INFO] [stderr] Checking rand v0.4.2 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking nodrop v0.1.12 [INFO] [stderr] Checking lazy_static v1.0.0 [INFO] [stderr] Checking num_cpus v1.8.0 [INFO] [stderr] Compiling num-traits v0.2.4 [INFO] [stderr] Compiling semver v0.1.20 [INFO] [stderr] Checking smallvec v0.6.1 [INFO] [stderr] Compiling num-integer v0.1.38 [INFO] [stderr] Checking time v0.1.40 [INFO] [stderr] Checking serde v1.0.55 [INFO] [stderr] Compiling syn v0.13.10 [INFO] [stderr] Compiling version_check v0.1.3 [INFO] [stderr] Checking unreachable v1.0.0 [INFO] [stderr] Checking log v0.4.1 [INFO] [stderr] Checking net2 v0.2.32 [INFO] [stderr] Checking crossbeam-utils v0.3.2 [INFO] [stderr] Checking arrayvec v0.4.7 [INFO] [stderr] Checking memchr v2.0.1 [INFO] [stderr] Checking slab v0.3.0 [INFO] [stderr] Checking log v0.3.9 [INFO] [stderr] Compiling cc v1.0.15 [INFO] [stderr] Compiling regex v0.2.11 [INFO] [stderr] Checking bytes v0.4.7 [INFO] [stderr] Compiling rustc_version v0.1.7 [INFO] [stderr] Checking mio v0.6.14 [INFO] [stderr] Compiling unicase v2.1.0 [INFO] [stderr] Checking aho-corasick v0.6.4 [INFO] [stderr] Checking parking_lot_core v0.2.14 [INFO] [stderr] Checking rand v0.3.22 [INFO] [stderr] Checking regex-syntax v0.5.6 [INFO] [stderr] Checking thread_local v0.3.5 [INFO] [stderr] Checking thread-id v2.0.0 [INFO] [stderr] Checking memchr v0.1.11 [INFO] [stderr] Checking crossbeam-epoch v0.4.1 [INFO] [stderr] Compiling libc v0.2.40 [INFO] [stderr] Checking stable_deref_trait v1.0.0 [INFO] [stderr] Compiling num-iter v0.1.37 [INFO] [stderr] Checking owning_ref v0.3.3 [INFO] [stderr] Checking thread_local v0.2.7 [INFO] [stderr] Compiling nix v0.7.0 [INFO] [stderr] Checking aho-corasick v0.5.3 [INFO] [stderr] Compiling rustc_version v0.2.2 [INFO] [stderr] Checking thread-id v3.3.0 [INFO] [stderr] Checking take v0.1.0 [INFO] [stderr] Checking utf8-ranges v0.1.3 [INFO] [stderr] Checking owning_ref v0.2.4 [INFO] [stderr] Compiling bitflags v0.7.0 [INFO] [stderr] Checking crossbeam-deque v0.3.1 [INFO] [stderr] Checking regex-syntax v0.3.9 [INFO] [stderr] Checking try-lock v0.1.0 [INFO] [stderr] Checking smallvec v0.2.1 [INFO] [stderr] Compiling heapsize v0.3.9 [INFO] [stderr] Checking parking_lot v0.3.8 [INFO] [stderr] Compiling backtrace-sys v0.1.16 [INFO] [stderr] Checking base64 v0.9.1 [INFO] [stderr] Checking mime v0.3.7 [INFO] [stderr] Compiling bigint v1.0.5 [INFO] [stderr] Checking parking_lot v0.5.5 [INFO] [stderr] Compiling vergen v0.1.1 [INFO] [stderr] Checking odds v0.2.26 [INFO] [stderr] Checking unicode-width v0.1.4 [INFO] [stderr] Checking bitflags v0.9.1 [INFO] [stderr] Checking httparse v1.2.4 [INFO] [stderr] Checking lazycell v0.4.0 [INFO] [stderr] Checking arrayvec v0.3.25 [INFO] [stderr] Checking textwrap v0.9.0 [INFO] [stderr] Checking nix v0.9.0 [INFO] [stderr] Checking isatty v0.1.7 [INFO] [stderr] Checking chrono v0.4.2 [INFO] [stderr] Checking atty v0.2.10 [INFO] [stderr] Checking ansi_term v0.9.0 [INFO] [stderr] Checking num v0.1.42 [INFO] [stderr] Checking strsim v0.7.0 [INFO] [stderr] Checking rustc-serialize v0.3.24 [INFO] [stderr] Checking regex v0.1.80 [INFO] [stderr] Checking serde v0.8.23 [INFO] [stderr] Compiling toyrpc v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking base32 v0.3.1 [INFO] [stderr] Checking slab v0.2.0 [INFO] [stderr] Checking tokio-executor v0.1.2 [INFO] [stderr] Checking tokio-io v0.1.6 [INFO] [stderr] Checking tokio-service v0.1.0 [INFO] [stderr] Checking want v0.0.4 [INFO] [stderr] Checking relay v0.1.1 [INFO] [stderr] Checking futures-cpupool v0.1.8 [INFO] [stderr] Checking xdg v2.1.0 [INFO] [stderr] Checking clap v2.31.2 [INFO] [stderr] Checking number_prefix v0.2.8 [INFO] [stderr] Checking mio v0.6.1 (https://github.com/ethcore/mio#15a57703) [INFO] [stderr] Checking tokio-threadpool v0.1.3 [INFO] [stderr] Checking tokio-timer v0.2.3 [INFO] [stderr] Checking app_dirs v1.2.1 [INFO] [stdout] error[E0310]: the parameter type `T` may not live long enough [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustc-serialize-0.3.24/src/serialize.rs:1155:5 [INFO] [stdout] | [INFO] [stdout] 1155 | fn decode(d: &mut D) -> Result, D::Error> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | the parameter type `T` must be valid for the static lifetime... [INFO] [stdout] | ...so that the type `T` will meet its required lifetime bounds... [INFO] [stdout] | [INFO] [stdout] note: ...that is required by this bound [INFO] [stdout] --> library/alloc/src/borrow.rs:182:29 [INFO] [stdout] help: consider adding an explicit lifetime bound [INFO] [stdout] | [INFO] [stdout] 1151 | impl<'a, T: ?Sized + 'static> Decodable for Cow<'a, T> [INFO] [stdout] | +++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking daemonize v0.2.3 [INFO] [stderr] Checking fdlimit v0.1.1 [INFO] [stderr] Checking ethcore-io v1.7.0 (/opt/rustwide/workdir/crates/util/io) [INFO] [stderr] Checking order-stat v0.1.3 [INFO] [stderr] Checking ansi_term v0.7.5 [INFO] [stdout] warning: unexpected `cfg` condition value: `dev` [INFO] [stdout] --> crates/util/io/src/panics.rs:82:13 [INFO] [stdout] | [INFO] [stdout] 82 | #[cfg_attr(feature="dev", allow(deprecated))] [INFO] [stdout] | ^^^^^^^^^^^^^ help: remove the condition [INFO] [stdout] | [INFO] [stdout] = note: no expected values for `feature` [INFO] [stdout] = help: consider adding `dev` as a feature in `Cargo.toml` [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] = note: `#[warn(unexpected_cfgs)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:50:16 [INFO] [stdout] | [INFO] [stdout] 50 | handler: Arc+Send>, [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 [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] 50 | handler: Arc+Send>, [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:185:32 [INFO] [stdout] | [INFO] [stdout] 185 | handlers: Arc>, HandlerId>>>, [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 185 | handlers: Arc>, HandlerId>>>, [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:334:40 [INFO] [stdout] | [INFO] [stdout] 334 | SharedCollection(Weak>, HandlerId>>>), [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 334 | SharedCollection(Weak>, HandlerId>>>), [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:335:14 [INFO] [stdout] | [INFO] [stdout] 335 | Single(Weak>), [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 335 | Single(Weak>), [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:423:32 [INFO] [stdout] | [INFO] [stdout] 423 | handlers: Arc>, HandlerId>>>, [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 423 | handlers: Arc>, HandlerId>>>, [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/worker.rs:49:19 [INFO] [stdout] | [INFO] [stdout] 49 | pub handler: Arc>, [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 49 | pub handler: Arc>, [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/panics.rs:58:27 [INFO] [stdout] | [INFO] [stdout] 58 | listeners: Mutex>> [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 58 | listeners: Mutex>> [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:196:33 [INFO] [stdout] | [INFO] [stdout] 196 | handlers: Arc>, HandlerId>>> [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 196 | handlers: Arc>, HandlerId>>> [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:403:34 [INFO] [stdout] | [INFO] [stdout] 403 | pub fn to_handler(handler: Weak>) -> IoChannel { [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 403 | pub fn to_handler(handler: Weak>) -> IoChannel { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:409:77 [INFO] [stdout] | [INFO] [stdout] 409 | fn new(channel: Sender>, handlers: Weak>, HandlerId>>>) -> IoChannel [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 409 | fn new(channel: Sender>, handlers: Weak>, HandlerId>>>) -> IoChannel { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> crates/util/io/src/service.rs:472:46 [INFO] [stdout] | [INFO] [stdout] 472 | pub fn register_handler(&self, handler: Arc+Send>) -> Result<(), IoError> { [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 [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 472 | pub fn register_handler(&self, handler: Arc+Send>) -> Result<(), IoError> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking target_info v0.1.0 [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> crates/util/io/src/panics.rs:93:7 [INFO] [stdout] | [INFO] [stdout] 93 | for mut listener in &mut **listeners { [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] error: non-binding let on a synchronization lock [INFO] [stdout] --> crates/util/io/src/worker.rs:100:9 [INFO] [stdout] | [INFO] [stdout] 100 | let _ = wait.wait(lock); [INFO] [stdout] | ^ this lock is not assigned to a binding and is immediately dropped [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(let_underscore_lock)]` (part of `#[deny(let_underscore)]`) on by default [INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 100 | let _unused = wait.wait(lock); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 100 - let _ = wait.wait(lock); [INFO] [stdout] 100 + drop(wait.wait(lock)); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: non-binding let on a synchronization lock [INFO] [stdout] --> crates/util/io/src/worker.rs:136:7 [INFO] [stdout] | [INFO] [stdout] 136 | let _ = self.wait_mutex.lock().expect("Poisoned work_loop mutex"); [INFO] [stdout] | ^ this lock is not assigned to a binding and is immediately dropped [INFO] [stdout] | [INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 136 | let _unused = self.wait_mutex.lock().expect("Poisoned work_loop mutex"); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 136 - let _ = self.wait_mutex.lock().expect("Poisoned work_loop mutex"); [INFO] [stdout] 136 + drop(self.wait_mutex.lock().expect("Poisoned work_loop mutex")); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `ethcore-io` (lib) due to 2 previous errors; 13 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] For more information about this error, try `rustc --explain E0310`. [INFO] [stdout] [INFO] [stderr] error: could not compile `rustc-serialize` (lib) due to 1 previous error [INFO] running `Command { std: "docker" "inspect" "b6f63ee5bb6542685a102646f3b7529a2c92e47115ba2b273afb7c50ebfb68e0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b6f63ee5bb6542685a102646f3b7529a2c92e47115ba2b273afb7c50ebfb68e0", kill_on_drop: false }` [INFO] [stdout] b6f63ee5bb6542685a102646f3b7529a2c92e47115ba2b273afb7c50ebfb68e0