[INFO] updating cached repository https://github.com/isso0424/rust-network
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1baddba3d999586cae03bda81f459ed9ebe3acf
[INFO] checking isso0424/rust-network against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fisso0424%2Frust-network" "/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/isso0424/rust-network on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/isso0424/rust-network
[INFO] finished tweaking git repo https://github.com/isso0424/rust-network
[INFO] tweaked toml for git repo https://github.com/isso0424/rust-network written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/isso0424/rust-network already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "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] 17d8596d5acef9e66e52d57d9dd2992b38ddd7d5c87dca4ca7b656e9ed34ca3f
[INFO] running `Command { std: "docker" "start" "-a" "17d8596d5acef9e66e52d57d9dd2992b38ddd7d5c87dca4ca7b656e9ed34ca3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17d8596d5acef9e66e52d57d9dd2992b38ddd7d5c87dca4ca7b656e9ed34ca3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17d8596d5acef9e66e52d57d9dd2992b38ddd7d5c87dca4ca7b656e9ed34ca3f", kill_on_drop: false }`
[INFO] [stdout] 17d8596d5acef9e66e52d57d9dd2992b38ddd7d5c87dca4ca7b656e9ed34ca3f
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 612a5ae74e2006bc0be8845401659ad521001281477d99779465b3e1c72a27d3
[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" "612a5ae74e2006bc0be8845401659ad521001281477d99779465b3e1c72a27d3", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v1.0.14
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking addr2line v0.12.1
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking first v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/tcp_server.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         stream.write_all(&buffer[..nbytes]);
[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/tcp_server.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         stream.write_all(&buffer[..nbytes]);
[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/udp_server.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         server_socket.send_to(&buf, src);
[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: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/udp_server.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         server_socket.send_to(&buf, src);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.96s
[INFO] running `Command { std: "docker" "inspect" "612a5ae74e2006bc0be8845401659ad521001281477d99779465b3e1c72a27d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "612a5ae74e2006bc0be8845401659ad521001281477d99779465b3e1c72a27d3", kill_on_drop: false }`
[INFO] [stdout] 612a5ae74e2006bc0be8845401659ad521001281477d99779465b3e1c72a27d3