[INFO] cloning repository https://github.com/team-rust/mailbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/team-rust/mailbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteam-rust%2Fmailbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteam-rust%2Fmailbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1080ebc5bb1e9af9033169e806b52b05718376b7
[INFO] testing team-rust/mailbox against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteam-rust%2Fmailbox" "/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/team-rust/mailbox on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/team-rust/mailbox
[INFO] finished tweaking git repo https://github.com/team-rust/mailbox
[INFO] tweaked toml for git repo https://github.com/team-rust/mailbox written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/team-rust/mailbox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33ad09c11f7d406a2f12be03a2a98b94326c48d372249964f53f04cb3f1e1aa9
[INFO] running `Command { std: "docker" "start" "-a" "33ad09c11f7d406a2f12be03a2a98b94326c48d372249964f53f04cb3f1e1aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33ad09c11f7d406a2f12be03a2a98b94326c48d372249964f53f04cb3f1e1aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33ad09c11f7d406a2f12be03a2a98b94326c48d372249964f53f04cb3f1e1aa9", kill_on_drop: false }`
[INFO] [stdout] 33ad09c11f7d406a2f12be03a2a98b94326c48d372249964f53f04cb3f1e1aa9
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ec3144154e627c0a3f61ecc021845ae9f9e2dada4628fbf35f087fb2302a903
[INFO] running `Command { std: "docker" "start" "-a" "6ec3144154e627c0a3f61ecc021845ae9f9e2dada4628fbf35f087fb2302a903", kill_on_drop: false }`
[INFO] [stderr]    Compiling mailbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/mailbox.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn new(sender: String, receiver: String, body: String) -> Message {
[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: `new`
[INFO] [stdout]   --> src/mailbox.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new() -> Mailbox {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `store`
[INFO] [stdout]   --> src/mailbox.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn store(&mut self, m: Message) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fetch`
[INFO] [stdout]   --> src/mailbox.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn fetch(&mut self) -> Option<Message> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SyncedMailbox`
[INFO] [stdout]  --> src/syncedmailbox.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SyncedMailbox {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/syncedmailbox.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn new() -> SyncedMailbox {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `store`
[INFO] [stdout]   --> src/syncedmailbox.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn store(&self, m: mailbox::Message) -> Result<(), String> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fetch`
[INFO] [stdout]   --> src/syncedmailbox.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn fetch(&self) -> Result<mailbox::Message, String> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6ec3144154e627c0a3f61ecc021845ae9f9e2dada4628fbf35f087fb2302a903", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ec3144154e627c0a3f61ecc021845ae9f9e2dada4628fbf35f087fb2302a903", kill_on_drop: false }`
[INFO] [stdout] 6ec3144154e627c0a3f61ecc021845ae9f9e2dada4628fbf35f087fb2302a903
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9cbcbc01f3fe53de32ce54d37956e6495e62334aed25756268edd7aaf7456a59
[INFO] running `Command { std: "docker" "start" "-a" "9cbcbc01f3fe53de32ce54d37956e6495e62334aed25756268edd7aaf7456a59", kill_on_drop: false }`
[INFO] [stderr]    Compiling mailbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "9cbcbc01f3fe53de32ce54d37956e6495e62334aed25756268edd7aaf7456a59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cbcbc01f3fe53de32ce54d37956e6495e62334aed25756268edd7aaf7456a59", kill_on_drop: false }`
[INFO] [stdout] 9cbcbc01f3fe53de32ce54d37956e6495e62334aed25756268edd7aaf7456a59
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b85e3901c631a5d6defee051357fa353b7fae06324bfe6ccd0356091604cfade
[INFO] running `Command { std: "docker" "start" "-a" "b85e3901c631a5d6defee051357fa353b7fae06324bfe6ccd0356091604cfade", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mailbox-818d643e0f8dc6b6)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test mailbox::tests::test_fetch ... ok
[INFO] [stdout] test mailbox::tests::test_store ... ok
[INFO] [stdout] test syncedmailbox::tests::test_fetch ... ok
[INFO] [stdout] test syncedmailbox::tests::test_store ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b85e3901c631a5d6defee051357fa353b7fae06324bfe6ccd0356091604cfade", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b85e3901c631a5d6defee051357fa353b7fae06324bfe6ccd0356091604cfade", kill_on_drop: false }`
[INFO] [stdout] b85e3901c631a5d6defee051357fa353b7fae06324bfe6ccd0356091604cfade