[INFO] cloning repository https://github.com/muranoya/CubaLibre
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/muranoya/CubaLibre" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuranoya%2FCubaLibre", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuranoya%2FCubaLibre'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0994d8fef090c1831e844a32cf52edc867e32ad
[INFO] checking muranoya/CubaLibre against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuranoya%2FCubaLibre" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/muranoya/CubaLibre on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/muranoya/CubaLibre
[INFO] finished tweaking git repo https://github.com/muranoya/CubaLibre
[INFO] tweaked toml for git repo https://github.com/muranoya/CubaLibre written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/muranoya/CubaLibre already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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] 034c794a2dfa43c58d1915ad9559691ebf41055e181a7a1e210b2fc7b532ff91
[INFO] running `Command { std: "docker" "start" "-a" "034c794a2dfa43c58d1915ad9559691ebf41055e181a7a1e210b2fc7b532ff91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "034c794a2dfa43c58d1915ad9559691ebf41055e181a7a1e210b2fc7b532ff91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "034c794a2dfa43c58d1915ad9559691ebf41055e181a7a1e210b2fc7b532ff91", kill_on_drop: false }`
[INFO] [stdout] 034c794a2dfa43c58d1915ad9559691ebf41055e181a7a1e210b2fc7b532ff91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 742d09631333d9d51b4316f80372bc463a2c9b31e0044a9dd6c269f2683ceece
[INFO] running `Command { std: "docker" "start" "-a" "742d09631333d9d51b4316f80372bc463a2c9b31e0044a9dd6c269f2683ceece", kill_on_drop: false }`
[INFO] [stderr]     Checking cuba_libre v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Shutdown`
[INFO] [stdout]  --> src/main.rs:2:40
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::net::{TcpListener, TcpStream, Shutdown};
[INFO] [stdout]   |                                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Shutdown`
[INFO] [stdout]  --> src/main.rs:2:40
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::net::{TcpListener, TcpStream, Shutdown};
[INFO] [stdout]   |                                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn set_options(args:&mut env::Args) -> Result<RToption, String> {
[INFO] [stdout]     |                ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]    --> src/main.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn set_options(args:&mut env::Args) -> Result<RToption, String> {
[INFO] [stdout]     |                ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `verbose`
[INFO] [stdout]   --> src/main.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     verbose:     i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_usage`
[INFO] [stdout]   --> src/main.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn print_usage(args:&mut env::Args) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `verbose`
[INFO] [stdout]   --> src/main.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     verbose:     i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_usage`
[INFO] [stdout]   --> src/main.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn print_usage(args:&mut env::Args) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:257:21
[INFO] [stdout]     |
[INFO] [stdout] 257 |                     sendrecv_data(req, sock);
[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/main.rs:257:21
[INFO] [stdout]     |
[INFO] [stdout] 257 |                     sendrecv_data(req, sock);
[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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "742d09631333d9d51b4316f80372bc463a2c9b31e0044a9dd6c269f2683ceece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "742d09631333d9d51b4316f80372bc463a2c9b31e0044a9dd6c269f2683ceece", kill_on_drop: false }`
[INFO] [stdout] 742d09631333d9d51b4316f80372bc463a2c9b31e0044a9dd6c269f2683ceece