[INFO] fetching crate kano 0.0.1...
[INFO] checking kano-0.0.1 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate kano 0.0.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate kano 0.0.1 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kano 0.0.1
[INFO] finished tweaking crates.io crate kano 0.0.1
[INFO] tweaked toml for crates.io crate kano 0.0.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 33 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3562610ce96c5afdb1619abb86c15b34e3a4262ebdc227e03592589cee5895a
[INFO] running `Command { std: "docker" "start" "-a" "d3562610ce96c5afdb1619abb86c15b34e3a4262ebdc227e03592589cee5895a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3562610ce96c5afdb1619abb86c15b34e3a4262ebdc227e03592589cee5895a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3562610ce96c5afdb1619abb86c15b34e3a4262ebdc227e03592589cee5895a", kill_on_drop: false }`
[INFO] [stdout] d3562610ce96c5afdb1619abb86c15b34e3a4262ebdc227e03592589cee5895a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=forbid -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9451728d4e5d2ae999b036cabb100595180427b64bcf2d0b3d47d2318f0d0902
[INFO] running `Command { std: "docker" "start" "-a" "9451728d4e5d2ae999b036cabb100595180427b64bcf2d0b3d47d2318f0d0902", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling kano-macros v0.0.1
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking kano v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `SinkExt` and `StreamExt`
[INFO] [stdout]  --> src/signal.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::{SinkExt, StreamExt};
[INFO] [stdout]   |               ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `style::*`
[INFO] [stdout]   --> src/lib.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use style::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SinkExt` and `StreamExt`
[INFO] [stdout]  --> src/signal.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::{SinkExt, StreamExt};
[INFO] [stdout]   |               ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `style::*`
[INFO] [stdout]   --> src/lib.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub use style::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sender`
[INFO] [stdout]   --> src/signal.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 let mut sender = get_signal_sender(registry);
[INFO] [stdout]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sender`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/signal.rs:25:21
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 let mut sender = get_signal_sender(registry);
[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: unused variable: `sender`
[INFO] [stdout]   --> src/signal.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 let mut sender = get_signal_sender(registry);
[INFO] [stdout]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sender`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/signal.rs:25:21
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 let mut sender = get_signal_sender(registry);
[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: unused variable: `receiver`
[INFO] [stdout]   --> src/signal.rs:88:26
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let (sender, mut receiver) = futures::channel::mpsc::channel::<()>(1);
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receiver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/signal.rs:88:22
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let (sender, mut receiver) = futures::channel::mpsc::channel::<()>(1);
[INFO] [stdout]    |                      ----^^^^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/lib.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn log(s: &str) {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `receiver`
[INFO] [stdout]   --> src/signal.rs:88:26
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let (sender, mut receiver) = futures::channel::mpsc::channel::<()>(1);
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receiver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/signal.rs:88:22
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let (sender, mut receiver) = futures::channel::mpsc::channel::<()>(1);
[INFO] [stdout]    |                      ----^^^^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/lib.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn log(s: &str) {
[INFO] [stdout]    |            ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `on_signal` is never used
[INFO] [stdout]   --> src/signal.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub trait OnSignal {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] 51 |     fn on_signal(&self, target: ViewId) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `broadcast` is never used
[INFO] [stdout]   --> src/signal.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn broadcast(signals: HashSet<Signal>) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `on_signal` is never used
[INFO] [stdout]   --> src/signal.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub trait OnSignal {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] 51 |     fn on_signal(&self, target: ViewId) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `broadcast` is never used
[INFO] [stdout]   --> src/signal.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn broadcast(signals: HashSet<Signal>) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.40s
[INFO] running `Command { std: "docker" "inspect" "9451728d4e5d2ae999b036cabb100595180427b64bcf2d0b3d47d2318f0d0902", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9451728d4e5d2ae999b036cabb100595180427b64bcf2d0b3d47d2318f0d0902", kill_on_drop: false }`
[INFO] [stdout] 9451728d4e5d2ae999b036cabb100595180427b64bcf2d0b3d47d2318f0d0902