[INFO] updating cached 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" "-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] 1080ebc5bb1e9af9033169e806b52b05718376b7
[INFO] checking team-rust/mailbox against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteam-rust%2Fmailbox" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/team-rust/mailbox on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", 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-14/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" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3547c7285171295dde31781401de6282f6e2d1bd45aab547bf2842f615cd7098
[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" "3547c7285171295dde31781401de6282f6e2d1bd45aab547bf2842f615cd7098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3547c7285171295dde31781401de6282f6e2d1bd45aab547bf2842f615cd7098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3547c7285171295dde31781401de6282f6e2d1bd45aab547bf2842f615cd7098", kill_on_drop: false }`
[INFO] [stdout] 3547c7285171295dde31781401de6282f6e2d1bd45aab547bf2842f615cd7098
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "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] d25e469186cadb14b7ead0fa5081afe83a2b79a41d33f80f00b1c50ba0b75924
[INFO] running `Command { std: "docker" "start" "-a" "d25e469186cadb14b7ead0fa5081afe83a2b79a41d33f80f00b1c50ba0b75924", kill_on_drop: false }`
[INFO] [stderr]     Checking 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] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "d25e469186cadb14b7ead0fa5081afe83a2b79a41d33f80f00b1c50ba0b75924", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d25e469186cadb14b7ead0fa5081afe83a2b79a41d33f80f00b1c50ba0b75924", kill_on_drop: false }`
[INFO] [stdout] d25e469186cadb14b7ead0fa5081afe83a2b79a41d33f80f00b1c50ba0b75924