[INFO] fetching crate romp 0.5.2...
[INFO] checking romp-0.5.2 against beta for pr-78714
[INFO] extracting crate romp 0.5.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate romp 0.5.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate romp 0.5.2
[INFO] finished tweaking crates.io crate romp 0.5.2
[INFO] tweaked toml for crates.io crate romp 0.5.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate romp 0.5.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed8ae26cd5e1f919964e79e9e14ed1de2624716788bb7775733bed6c01da963c
[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" "ed8ae26cd5e1f919964e79e9e14ed1de2624716788bb7775733bed6c01da963c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed8ae26cd5e1f919964e79e9e14ed1de2624716788bb7775733bed6c01da963c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed8ae26cd5e1f919964e79e9e14ed1de2624716788bb7775733bed6c01da963c", kill_on_drop: false }`
[INFO] [stdout] ed8ae26cd5e1f919964e79e9e14ed1de2624716788bb7775733bed6c01da963c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5298eff4fb7357a30a72048bf5cfe8b421296cfb392121b0373cf5208d73d63
[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" "e5298eff4fb7357a30a72048bf5cfe8b421296cfb392121b0373cf5208d73d63", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking arc-swap v0.3.11
[INFO] [stderr]     Checking sanename v0.1.1
[INFO] [stderr]     Checking base16 v0.2.1
[INFO] [stderr]     Checking totems v0.2.7
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking tokio-executor v0.1.9
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking serde_yaml v0.8.11
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking serde_json v1.0.45
[INFO] [stderr]     Checking signal-hook v0.1.13
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking tokio-timer v0.2.12
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking tokio-threadpool v0.1.17
[INFO] [stderr]     Checking chashmap v2.2.2
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio-reactor v0.1.11
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.5
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-signal v0.2.7
[INFO] [stderr]     Checking serde-value v0.5.3
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking log4rs v0.8.3
[INFO] [stderr]     Checking romp v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/session/reader.rs:183:13
[INFO] [stdout]     |
[INFO] [stdout] 183 |         let mut message =  self.parser.take_message(Ownership::Session);
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `session_id`
[INFO] [stdout]   --> src/session/reader.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     session_id: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stdout]   --> src/workflow/filter/echo.rs:41:29
[INFO] [stdout]    |
[INFO] [stdout] 41 | ...                   reply_destination.split_off(destination_name.len() - 3);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stdout]   --> src/workflow/filter/resend.rs:40:29
[INFO] [stdout]    |
[INFO] [stdout] 40 | ...                   reply_destination.split_off(destination_name.len() - 3);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/session/reader.rs:183:13
[INFO] [stdout]     |
[INFO] [stdout] 183 |         let mut message =  self.parser.take_message(Ownership::Session);
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `session_id`
[INFO] [stdout]   --> src/session/reader.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     session_id: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stdout]   --> src/workflow/filter/echo.rs:41:29
[INFO] [stdout]    |
[INFO] [stdout] 41 | ...                   reply_destination.split_off(destination_name.len() - 3);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stdout]   --> src/workflow/filter/resend.rs:40:29
[INFO] [stdout]    |
[INFO] [stdout] 40 | ...                   reply_destination.split_off(destination_name.len() - 3);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.72s
[INFO] running `Command { std: "docker" "inspect" "e5298eff4fb7357a30a72048bf5cfe8b421296cfb392121b0373cf5208d73d63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5298eff4fb7357a30a72048bf5cfe8b421296cfb392121b0373cf5208d73d63", kill_on_drop: false }`
[INFO] [stdout] e5298eff4fb7357a30a72048bf5cfe8b421296cfb392121b0373cf5208d73d63