[INFO] cloning repository https://github.com/Anecoz/falafel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Anecoz/falafel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnecoz%2Ffalafel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnecoz%2Ffalafel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 856b17895f5e44ab7fa35bc4bf6229e9c000adc7
[INFO] checking Anecoz/falafel against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnecoz%2Ffalafel" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Anecoz/falafel 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/Anecoz/falafel
[INFO] finished tweaking git repo https://github.com/Anecoz/falafel
[INFO] tweaked toml for git repo https://github.com/Anecoz/falafel written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Anecoz/falafel 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] b6fd35792a0cdf3ed5f3cfd99ba021a2b1d583b4c48d7698da30fcc4e5e66f67
[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" "b6fd35792a0cdf3ed5f3cfd99ba021a2b1d583b4c48d7698da30fcc4e5e66f67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6fd35792a0cdf3ed5f3cfd99ba021a2b1d583b4c48d7698da30fcc4e5e66f67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6fd35792a0cdf3ed5f3cfd99ba021a2b1d583b4c48d7698da30fcc4e5e66f67", kill_on_drop: false }`
[INFO] [stdout] b6fd35792a0cdf3ed5f3cfd99ba021a2b1d583b4c48d7698da30fcc4e5e66f67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] eec9598dfd42a7b9361172d2006a83cb98144048d503cf7e22ba386f2f213595
[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" "eec9598dfd42a7b9361172d2006a83cb98144048d503cf7e22ba386f2f213595", kill_on_drop: false }`
[INFO] [stderr]     Checking falafel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `HEADER_SIZE`
[INFO] [stdout]  --> src/common.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 2 |   pub const HEADER_SIZE: u32 = 2; // 1 byte for type, 1 byte for size of packet
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `PacketHeader`
[INFO] [stdout]  --> src/common.rs:9:14
[INFO] [stdout]   |
[INFO] [stdout] 9 |   pub struct PacketHeader {
[INFO] [stdout]   |              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize_header`
[INFO] [stdout]   --> src/common.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn deserialize_header(header_bytes: Vec<u8>) -> PacketHeader {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize`
[INFO] [stdout]   --> src/common.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |   pub fn deserialize(header: PacketHeader, content_bytes: Vec<u8>) -> PacketType {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/client.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     std::io::stdout().flush();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEADER_SIZE`
[INFO] [stdout]  --> src/common.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 2 |   pub const HEADER_SIZE: u32 = 2; // 1 byte for type, 1 byte for size of packet
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `PacketHeader`
[INFO] [stdout]  --> src/common.rs:9:14
[INFO] [stdout]   |
[INFO] [stdout] 9 |   pub struct PacketHeader {
[INFO] [stdout]   |              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize_header`
[INFO] [stdout]   --> src/common.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn deserialize_header(header_bytes: Vec<u8>) -> PacketHeader {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize`
[INFO] [stdout]   --> src/common.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |   pub fn deserialize(header: PacketHeader, content_bytes: Vec<u8>) -> PacketType {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/client.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     std::io::stdout().flush();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/client.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     writer.write(&serialized[..]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `serialize`
[INFO] [stdout]   --> src/common.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |   pub fn serialize(packet: PacketType) -> Vec<u8> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/client.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     writer.write(&serialized[..]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `serialize`
[INFO] [stdout]   --> src/common.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |   pub fn serialize(packet: PacketType) -> Vec<u8> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "eec9598dfd42a7b9361172d2006a83cb98144048d503cf7e22ba386f2f213595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eec9598dfd42a7b9361172d2006a83cb98144048d503cf7e22ba386f2f213595", kill_on_drop: false }`
[INFO] [stdout] eec9598dfd42a7b9361172d2006a83cb98144048d503cf7e22ba386f2f213595