[INFO] fetching crate cf 0.0.10...
[INFO] building cf-0.0.10 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate cf 0.0.10 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate cf 0.0.10
[INFO] finished tweaking crates.io crate cf 0.0.10
[INFO] tweaked toml for crates.io crate cf 0.0.10 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate cf 0.0.10 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate cf 0.0.10 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-task v0.3.19
[INFO] [stderr]   Downloaded serde v1.0.133
[INFO] [stderr]   Downloaded tokio-macros v1.8.2
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[INFO] [stderr]   Downloaded serde_derive v1.0.133
[INFO] [stderr]   Downloaded redis v0.21.5
[INFO] [stderr]   Downloaded hyper v0.14.16
[INFO] [stderr]   Downloaded reqwest v0.11.8
[INFO] [stderr]   Downloaded serde_json v1.0.74
[INFO] [stderr]   Downloaded combine v4.6.4
[INFO] [stderr]   Downloaded futures-util v0.3.19
[INFO] [stderr]   Downloaded h2 v0.3.10
[INFO] [stderr]   Downloaded quote v1.0.14
[INFO] [stderr]   Downloaded futures-sink v0.3.19
[INFO] [stderr]   Downloaded syn v1.0.85
[INFO] [stderr]   Downloaded tokio v1.15.0
[INFO] [stderr]   Downloaded libc v0.2.112
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f09b3c32a83704e4d61b8cc545a950fe5900e56ae870695ad91d23cba940929
[INFO] running `Command { std: "docker" "start" "-a" "2f09b3c32a83704e4d61b8cc545a950fe5900e56ae870695ad91d23cba940929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f09b3c32a83704e4d61b8cc545a950fe5900e56ae870695ad91d23cba940929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f09b3c32a83704e4d61b8cc545a950fe5900e56ae870695ad91d23cba940929", kill_on_drop: false }`
[INFO] [stdout] 2f09b3c32a83704e4d61b8cc545a950fe5900e56ae870695ad91d23cba940929
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e535ec2e005665a1e9fc4f89f779041c0eaaf21208c37e70f703db6d32720c1
[INFO] running `Command { std: "docker" "start" "-a" "3e535ec2e005665a1e9fc4f89f779041c0eaaf21208c37e70f703db6d32720c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling tracing-core v0.1.21
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling futures-sink v0.3.19
[INFO] [stderr]    Compiling futures-io v0.3.19
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling openssl-probe v0.1.4
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling http v0.2.6
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]    Compiling serde_json v1.0.74
[INFO] [stderr]    Compiling tracing v0.1.29
[INFO] [stderr]    Compiling encoding_rs v0.8.30
[INFO] [stderr]    Compiling httpdate v1.0.2
[INFO] [stderr]    Compiling combine v4.6.4
[INFO] [stderr]    Compiling sha1 v0.2.0
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling socket2 v0.4.2
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling http-body v0.4.4
[INFO] [stderr]    Compiling tokio-macros v1.8.2
[INFO] [stderr]    Compiling tokio v1.15.0
[INFO] [stderr]    Compiling redis v0.21.5
[INFO] [stderr]    Compiling tokio-util v0.6.9
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling h2 v0.3.10
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling hyper v0.14.16
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling reqwest v0.11.8
[INFO] [stderr]    Compiling cf v0.0.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     db.sadd("hello", "world");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let _ = db.sadd("hello", "world");
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     db.sadd("hello", "good");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let _ = db.sadd("hello", "good");
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     db.sclear("hello");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let _ = db.sclear("hello");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     db.set("hello", "world");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let _ = db.set("hello", "world");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 45.31s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: redis v0.21.5
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "3e535ec2e005665a1e9fc4f89f779041c0eaaf21208c37e70f703db6d32720c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e535ec2e005665a1e9fc4f89f779041c0eaaf21208c37e70f703db6d32720c1", kill_on_drop: false }`
[INFO] [stdout] 3e535ec2e005665a1e9fc4f89f779041c0eaaf21208c37e70f703db6d32720c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7b223a21395323ae27254aa48fd23a818ea0d188b4b1d6018f71b3b9f2acc12
[INFO] running `Command { std: "docker" "start" "-a" "e7b223a21395323ae27254aa48fd23a818ea0d188b4b1d6018f71b3b9f2acc12", kill_on_drop: false }`
[INFO] [stderr]    Compiling cf v0.0.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     db.sadd("hello", "world");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let _ = db.sadd("hello", "world");
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     db.sadd("hello", "good");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let _ = db.sadd("hello", "good");
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     db.sclear("hello");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let _ = db.sclear("hello");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     db.set("hello", "world");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let _ = db.set("hello", "world");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.00s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: redis v0.21.5
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "e7b223a21395323ae27254aa48fd23a818ea0d188b4b1d6018f71b3b9f2acc12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7b223a21395323ae27254aa48fd23a818ea0d188b4b1d6018f71b3b9f2acc12", kill_on_drop: false }`
[INFO] [stdout] e7b223a21395323ae27254aa48fd23a818ea0d188b4b1d6018f71b3b9f2acc12
