[INFO] cloning repository https://github.com/greeenway/state_machines
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/greeenway/state_machines" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgreeenway%2Fstate_machines", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgreeenway%2Fstate_machines'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b16f8dd18fa754635f8876d786ee5cc8ae9f3125
[INFO] checking greeenway/state_machines against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgreeenway%2Fstate_machines" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/greeenway/state_machines on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/greeenway/state_machines
[INFO] finished tweaking git repo https://github.com/greeenway/state_machines
[INFO] tweaked toml for git repo https://github.com/greeenway/state_machines written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/greeenway/state_machines already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4788ac84a7ea7aa3d3b51bedff2896f1e138b408c5b0ff11563b0771cc60530
[INFO] running `Command { std: "docker" "start" "-a" "e4788ac84a7ea7aa3d3b51bedff2896f1e138b408c5b0ff11563b0771cc60530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4788ac84a7ea7aa3d3b51bedff2896f1e138b408c5b0ff11563b0771cc60530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4788ac84a7ea7aa3d3b51bedff2896f1e138b408c5b0ff11563b0771cc60530", kill_on_drop: false }`
[INFO] [stdout] e4788ac84a7ea7aa3d3b51bedff2896f1e138b408c5b0ff11563b0771cc60530
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] adafe84bd56a5190755e93e9d9b7b72ccf6fb22442ec6abdd4ecdf7a461290aa
[INFO] running `Command { std: "docker" "start" "-a" "adafe84bd56a5190755e93e9d9b7b72ccf6fb22442ec6abdd4ecdf7a461290aa", kill_on_drop: false }`
[INFO] [stderr]     Checking states v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Stay` is never constructed
[INFO] [stdout]   --> src/main.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | enum Message {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 82 |     Stay {name: String},
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Stay` is never constructed
[INFO] [stdout]   --> src/main.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | enum Message {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 82 |     Stay {name: String},
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "adafe84bd56a5190755e93e9d9b7b72ccf6fb22442ec6abdd4ecdf7a461290aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adafe84bd56a5190755e93e9d9b7b72ccf6fb22442ec6abdd4ecdf7a461290aa", kill_on_drop: false }`
[INFO] [stdout] adafe84bd56a5190755e93e9d9b7b72ccf6fb22442ec6abdd4ecdf7a461290aa
[INFO] checking greeenway/state_machines against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgreeenway%2Fstate_machines" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/greeenway/state_machines on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/greeenway/state_machines
[INFO] finished tweaking git repo https://github.com/greeenway/state_machines
[INFO] tweaked toml for git repo https://github.com/greeenway/state_machines written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/greeenway/state_machines already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4bf859b94b92d4172e0bd905f49e135c7edf584975849edc91b61916821f141
[INFO] running `Command { std: "docker" "start" "-a" "b4bf859b94b92d4172e0bd905f49e135c7edf584975849edc91b61916821f141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4bf859b94b92d4172e0bd905f49e135c7edf584975849edc91b61916821f141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4bf859b94b92d4172e0bd905f49e135c7edf584975849edc91b61916821f141", kill_on_drop: false }`
[INFO] [stdout] b4bf859b94b92d4172e0bd905f49e135c7edf584975849edc91b61916821f141
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70535bc3412cf3c562c67777200287ba13a57948eb47e3f2fd54017ca7fabedd
[INFO] running `Command { std: "docker" "start" "-a" "70535bc3412cf3c562c67777200287ba13a57948eb47e3f2fd54017ca7fabedd", kill_on_drop: false }`
[INFO] [stderr]     Checking states v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed for `JoinHandle<T>`
[INFO] [stdout]    --> src/main.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |       let change_handle = thread::spawn(move || {
[INFO] [stdout]     |  _________^^^^^^^^^^^^^___-
[INFO] [stdout] 124 | |         
[INFO] [stdout] 125 | |         loop {
[INFO] [stdout] 126 | |             {
[INFO] [stdout] ...   |
[INFO] [stdout] 131 | |         }
[INFO] [stdout] 132 | |     });
[INFO] [stdout]     | |______- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `spawn`
[INFO] [stdout]    --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: consider giving `change_handle` an explicit type, where the type for type parameter `T` is specified
[INFO] [stdout]     |
[INFO] [stdout] 123 |     let change_handle: JoinHandle<T> = thread::spawn(move || {
[INFO] [stdout]     |                      +++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed for `JoinHandle<T>`
[INFO] [stdout]    --> src/main.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |       let change_handle = thread::spawn(move || {
[INFO] [stdout]     |  _________^^^^^^^^^^^^^___-
[INFO] [stdout] 124 | |         
[INFO] [stdout] 125 | |         loop {
[INFO] [stdout] 126 | |             {
[INFO] [stdout] ...   |
[INFO] [stdout] 131 | |         }
[INFO] [stdout] 132 | |     });
[INFO] [stdout]     | |______- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `spawn`
[INFO] [stdout]    --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: consider giving `change_handle` an explicit type, where the type for type parameter `T` is specified
[INFO] [stdout]     |
[INFO] [stdout] 123 |     let change_handle: JoinHandle<T> = thread::spawn(move || {
[INFO] [stdout]     |                      +++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `states` (bin "states") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `states` (bin "states" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "70535bc3412cf3c562c67777200287ba13a57948eb47e3f2fd54017ca7fabedd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70535bc3412cf3c562c67777200287ba13a57948eb47e3f2fd54017ca7fabedd", kill_on_drop: false }`
[INFO] [stdout] 70535bc3412cf3c562c67777200287ba13a57948eb47e3f2fd54017ca7fabedd