[INFO] cloning repository https://github.com/tkmct/future-sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tkmct/future-sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkmct%2Ffuture-sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkmct%2Ffuture-sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7a39152d7473ddd9da6b899de074febbe6e2e053
[INFO] checking tkmct/future-sample against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkmct%2Ffuture-sample" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tkmct/future-sample on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tkmct/future-sample
[INFO] finished tweaking git repo https://github.com/tkmct/future-sample
[INFO] tweaked toml for git repo https://github.com/tkmct/future-sample written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/tkmct/future-sample already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/tomusdrw/rust-web3`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ethereum-types-serialize v0.2.2
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[INFO] [stderr]   Downloaded tiny-keccak v1.4.3
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 856771f5516e707c4d1ee86d5f5fc2232b1a4a17d13c9de34d93dd58e5311943
[INFO] running `Command { std: "docker" "start" "-a" "856771f5516e707c4d1ee86d5f5fc2232b1a4a17d13c9de34d93dd58e5311943", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "856771f5516e707c4d1ee86d5f5fc2232b1a4a17d13c9de34d93dd58e5311943", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "856771f5516e707c4d1ee86d5f5fc2232b1a4a17d13c9de34d93dd58e5311943", kill_on_drop: false }`
[INFO] [stdout] 856771f5516e707c4d1ee86d5f5fc2232b1a4a17d13c9de34d93dd58e5311943
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57a951867daa36ca3c97548c1c64dbcbd2c98981223aa489e3149a1168b4d1ca
[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" "57a951867daa36ca3c97548c1c64dbcbd2c98981223aa489e3149a1168b4d1ca", kill_on_drop: false }`
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[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling serde v1.0.92
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[INFO] [stderr]     Checking tokio v0.1.21
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[INFO] [stderr]     Checking websocket v0.21.1
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[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling derive_more v0.14.1
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking impl-serde v0.2.0
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking ethereum-types-serialize v0.2.2
[INFO] [stderr]     Checking ethbloom v0.6.4
[INFO] [stderr]     Checking ethereum-types v0.5.2
[INFO] [stderr]     Checking jsonrpc-core v11.0.0
[INFO] [stderr]     Checking ethabi v7.0.0
[INFO] [stderr]     Checking web3 v0.7.0 (https://github.com/tomusdrw/rust-web3#21cb38c7)
[INFO] [stderr]     Checking future-sample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/event_watcher.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         loop {
[INFO] [stdout] 147 | |             let logs = match try_ready!(self.stream.poll()) {
[INFO] [stdout] 148 | |                 Some(value) => value,
[INFO] [stdout] 149 | |                 None => continue,
[INFO] [stdout] ...   |
[INFO] [stdout] 157 | |             }
[INFO] [stdout] 158 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 159 | 
[INFO] [stdout] 160 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/event_watcher.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         loop {
[INFO] [stdout] 147 | |             let logs = match try_ready!(self.stream.poll()) {
[INFO] [stdout] 148 | |                 Some(value) => value,
[INFO] [stdout] 149 | |                 None => continue,
[INFO] [stdout] ...   |
[INFO] [stdout] 157 | |             }
[INFO] [stdout] 158 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 159 | 
[INFO] [stdout] 160 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 28s
[INFO] running `Command { std: "docker" "inspect" "57a951867daa36ca3c97548c1c64dbcbd2c98981223aa489e3149a1168b4d1ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57a951867daa36ca3c97548c1c64dbcbd2c98981223aa489e3149a1168b4d1ca", kill_on_drop: false }`
[INFO] [stdout] 57a951867daa36ca3c97548c1c64dbcbd2c98981223aa489e3149a1168b4d1ca