[INFO] updating cached repository https://github.com/thomas-delalande/rust-playgroun
[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] 5ebe6b670283d2a59af84188f517c95c890e9f4f
[INFO] testing thomas-delalande/rust-playgroun/5ebe6b670283d2a59af84188f517c95c890e9f4f against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-delalande%2Frust-playgroun" "/workspace/builds/worker-78/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-78/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomas-delalande/rust-playgroun on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thomas-delalande/rust-playgroun
[INFO] finished tweaking git repo https://github.com/thomas-delalande/rust-playgroun
[INFO] tweaked toml for git repo https://github.com/thomas-delalande/rust-playgroun written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate git repo https://github.com/thomas-delalande/rust-playgroun already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae843d6aade14c500863d6192df9360b1ed86645857d1b7264cbed8157de9ba2
[INFO] running `Command { std: "docker" "start" "-a" "ae843d6aade14c500863d6192df9360b1ed86645857d1b7264cbed8157de9ba2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae843d6aade14c500863d6192df9360b1ed86645857d1b7264cbed8157de9ba2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae843d6aade14c500863d6192df9360b1ed86645857d1b7264cbed8157de9ba2", kill_on_drop: false }`
[INFO] [stdout] ae843d6aade14c500863d6192df9360b1ed86645857d1b7264cbed8157de9ba2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5f4ee2ac22803ca412b80fa06015cd5144d075e3d3f40a4e2310832332785fc
[INFO] running `Command { std: "docker" "start" "-a" "c5f4ee2ac22803ca412b80fa06015cd5144d075e3d3f40a4e2310832332785fc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling rmp v0.8.10
[INFO] [stderr]    Compiling rmp-serde v0.15.5
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/main.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | use serde::{Deserialize, Serialize};
[INFO] [stdout]    |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MessageBus`
[INFO] [stdout]  --> src/message_bus.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct MessageBus {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_client`
[INFO] [stdout]   --> src/message_bus.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn add_client(&mut self, id: u32, stream: TcpStream) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unicast`
[INFO] [stdout]   --> src/message_bus.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn unicast(&self, id: u32, message: &str) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `broadcast`
[INFO] [stdout]   --> src/message_bus.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn broadcast(&self, message: &str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             stream.shutdown(Shutdown::Both);
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.49s
[INFO] running `Command { std: "docker" "inspect" "c5f4ee2ac22803ca412b80fa06015cd5144d075e3d3f40a4e2310832332785fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5f4ee2ac22803ca412b80fa06015cd5144d075e3d3f40a4e2310832332785fc", kill_on_drop: false }`
[INFO] [stdout] c5f4ee2ac22803ca412b80fa06015cd5144d075e3d3f40a4e2310832332785fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1450b9f5048c479b6297ead4a9733025f2412967510c75f826418685bbbb99b
[INFO] running `Command { std: "docker" "start" "-a" "a1450b9f5048c479b6297ead4a9733025f2412967510c75f826418685bbbb99b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/main.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | use serde::{Deserialize, Serialize};
[INFO] [stdout]    |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MessageBus`
[INFO] [stdout]  --> src/message_bus.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct MessageBus {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_client`
[INFO] [stdout]   --> src/message_bus.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn add_client(&mut self, id: u32, stream: TcpStream) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unicast`
[INFO] [stdout]   --> src/message_bus.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn unicast(&self, id: u32, message: &str) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `broadcast`
[INFO] [stdout]   --> src/message_bus.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn broadcast(&self, message: &str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             stream.shutdown(Shutdown::Both);
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.20s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/server-b0c31e68a56fa933)
[INFO] running `Command { std: "docker" "inspect" "a1450b9f5048c479b6297ead4a9733025f2412967510c75f826418685bbbb99b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1450b9f5048c479b6297ead4a9733025f2412967510c75f826418685bbbb99b", kill_on_drop: false }`
[INFO] [stdout] a1450b9f5048c479b6297ead4a9733025f2412967510c75f826418685bbbb99b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 65d78c594f809f6d8434ff45c4b62e5da10714ec1ab44c693588dec846d72398
[INFO] running `Command { std: "docker" "start" "-a" "65d78c594f809f6d8434ff45c4b62e5da10714ec1ab44c693588dec846d72398", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stderr]   --> src/main.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 | use serde::{Deserialize, Serialize};
[INFO] [stderr]    |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MessageBus`
[INFO] [stderr]  --> src/message_bus.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct MessageBus {
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_client`
[INFO] [stderr]   --> src/message_bus.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn add_client(&mut self, id: u32, stream: TcpStream) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `unicast`
[INFO] [stderr]   --> src/message_bus.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn unicast(&self, id: u32, message: &str) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `broadcast`
[INFO] [stderr]   --> src/message_bus.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn broadcast(&self, message: &str) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             stream.shutdown(Shutdown::Both);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `server` (bin "server" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/server-b0c31e68a56fa933)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "65d78c594f809f6d8434ff45c4b62e5da10714ec1ab44c693588dec846d72398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65d78c594f809f6d8434ff45c4b62e5da10714ec1ab44c693588dec846d72398", kill_on_drop: false }`
[INFO] [stdout] 65d78c594f809f6d8434ff45c4b62e5da10714ec1ab44c693588dec846d72398