[INFO] cloning repository https://github.com/the-eater/black-widow [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/the-eater/black-widow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-eater%2Fblack-widow", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-eater%2Fblack-widow'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5f78e350ca784702b67053fcff96b691c1649f6f [INFO] checking the-eater/black-widow against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthe-eater%2Fblack-widow" "/workspace/builds/worker-11/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/the-eater/black-widow on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/the-eater/black-widow [INFO] finished tweaking git repo https://github.com/the-eater/black-widow [INFO] tweaked toml for git repo https://github.com/the-eater/black-widow written to /workspace/builds/worker-11/source/Cargo.toml [INFO] crate git repo https://github.com/the-eater/black-widow already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b6746d6144e882685e8ca8dd4a0517f7183f263b76b4ce18acb7946c03c42027 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "b6746d6144e882685e8ca8dd4a0517f7183f263b76b4ce18acb7946c03c42027", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b6746d6144e882685e8ca8dd4a0517f7183f263b76b4ce18acb7946c03c42027", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b6746d6144e882685e8ca8dd4a0517f7183f263b76b4ce18acb7946c03c42027", kill_on_drop: false }` [INFO] [stdout] b6746d6144e882685e8ca8dd4a0517f7183f263b76b4ce18acb7946c03c42027 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 22b9fd064b6f12855f6adba345abe84a9bc93a09a1129b098eaf86bb2f5dd47d [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "22b9fd064b6f12855f6adba345abe84a9bc93a09a1129b098eaf86bb2f5dd47d", kill_on_drop: false }` [INFO] [stderr] Compiling serde v1.0.70 [INFO] [stderr] Checking stable_deref_trait v1.1.1 [INFO] [stderr] Checking scopeguard v0.3.3 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Checking nodrop v0.1.12 [INFO] [stderr] Checking crossbeam-utils v0.5.0 [INFO] [stderr] Checking byteorder v1.2.4 [INFO] [stderr] Checking unicode-width v0.1.5 [INFO] [stderr] Checking untrusted v0.6.2 [INFO] [stderr] Checking futures v0.1.23 [INFO] [stderr] Checking unreachable v1.0.0 [INFO] [stderr] Compiling rust-crypto v0.2.36 [INFO] [stderr] Compiling ring v0.13.2 [INFO] [stderr] Compiling tun-tap v0.1.1 (https://github.com/vorner/tuntap#dd9255f1) [INFO] [stderr] Checking rand v0.3.22 [INFO] [stderr] Checking uuid v0.6.5 [INFO] [stderr] Checking owning_ref v0.3.3 [INFO] [stderr] Checking textwrap v0.10.0 [INFO] [stderr] Checking arrayvec v0.4.7 [INFO] [stderr] Checking smallvec v0.6.3 [INFO] [stderr] Compiling proc-macro2 v0.4.9 [INFO] [stderr] Checking bytes v0.4.9 [INFO] [stderr] Checking base64 v0.9.2 [INFO] [stderr] Checking lock_api v0.1.3 [INFO] [stderr] Checking crossbeam-epoch v0.5.2 [INFO] [stderr] Checking clap v2.32.0 [INFO] [stderr] Checking parking_lot_core v0.2.14 [INFO] [stderr] Checking parking_lot v0.6.3 [INFO] [stderr] Compiling quote v0.6.4 [INFO] [stderr] Compiling syn v0.14.5 [INFO] [stderr] Checking crossbeam-channel v0.2.4 [INFO] [stderr] Checking serde_json v1.0.24 [INFO] [stderr] Checking toml v0.4.6 [INFO] [stderr] Compiling serde_derive v1.0.70 [INFO] [stderr] Checking black-widow v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:310:13 [INFO] [stdout] | [INFO] [stdout] 310 | &stream.write(&output.into_bytes()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 310 | let _ = &stream.write(&output.into_bytes()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bw/router/dumb_router.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | &x.copy_from_slice(&data[..6]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 30 | let _ = &x.copy_from_slice(&data[..6]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bw/router/dumb_router.rs:36:5 [INFO] [stdout] | [INFO] [stdout] 36 | &x.copy_from_slice(&data[..32]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 36 | let _ = &x.copy_from_slice(&data[..32]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bw/router/dumb_router.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | &self.own_id.copy_from_slice(&own_id[..32]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 43 | let _ = &self.own_id.copy_from_slice(&own_id[..32]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:310:13 [INFO] [stdout] | [INFO] [stdout] 310 | &stream.write(&output.into_bytes()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 310 | let _ = &stream.write(&output.into_bytes()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bw/router/dumb_router.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | &x.copy_from_slice(&data[..6]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 30 | let _ = &x.copy_from_slice(&data[..6]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bw/router/dumb_router.rs:36:5 [INFO] [stdout] | [INFO] [stdout] 36 | &x.copy_from_slice(&data[..32]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 36 | let _ = &x.copy_from_slice(&data[..32]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/bw/router/dumb_router.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | &self.own_id.copy_from_slice(&own_id[..32]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 43 | let _ = &self.own_id.copy_from_slice(&own_id[..32]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 29.29s [INFO] running `Command { std: "docker" "inspect" "22b9fd064b6f12855f6adba345abe84a9bc93a09a1129b098eaf86bb2f5dd47d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "22b9fd064b6f12855f6adba345abe84a9bc93a09a1129b098eaf86bb2f5dd47d", kill_on_drop: false }` [INFO] [stdout] 22b9fd064b6f12855f6adba345abe84a9bc93a09a1129b098eaf86bb2f5dd47d