[INFO] fetching crate thread_lake 0.1.4...
[INFO] checking thread_lake-0.1.4 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate thread_lake 0.1.4 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate thread_lake 0.1.4 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 crates.io crate thread_lake 0.1.4
[INFO] finished tweaking crates.io crate thread_lake 0.1.4
[INFO] tweaked toml for crates.io crate thread_lake 0.1.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a53738557642ce8d925686940ee6a7f699056241904f394a6d08ec2195f58f2b
[INFO] running `Command { std: "docker" "start" "-a" "a53738557642ce8d925686940ee6a7f699056241904f394a6d08ec2195f58f2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a53738557642ce8d925686940ee6a7f699056241904f394a6d08ec2195f58f2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a53738557642ce8d925686940ee6a7f699056241904f394a6d08ec2195f58f2b", kill_on_drop: false }`
[INFO] [stdout] a53738557642ce8d925686940ee6a7f699056241904f394a6d08ec2195f58f2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] dae93280c9d633e729b8391fb9b3251c3fe7f20d5849b009b440060e99ada52d
[INFO] running `Command { std: "docker" "start" "-a" "dae93280c9d633e729b8391fb9b3251c3fe7f20d5849b009b440060e99ada52d", kill_on_drop: false }`
[INFO] [stderr]     Checking thread_lake v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "dae93280c9d633e729b8391fb9b3251c3fe7f20d5849b009b440060e99ada52d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dae93280c9d633e729b8391fb9b3251c3fe7f20d5849b009b440060e99ada52d", kill_on_drop: false }`
[INFO] [stdout] dae93280c9d633e729b8391fb9b3251c3fe7f20d5849b009b440060e99ada52d
[INFO] checking thread_lake-0.1.4 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate thread_lake 0.1.4 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate thread_lake 0.1.4 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 crates.io crate thread_lake 0.1.4
[INFO] finished tweaking crates.io crate thread_lake 0.1.4
[INFO] tweaked toml for crates.io crate thread_lake 0.1.4 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d3afcca22e0081de935f7992c89083949b5c22cae6525b02407cf4615b13b60d
[INFO] running `Command { std: "docker" "start" "-a" "d3afcca22e0081de935f7992c89083949b5c22cae6525b02407cf4615b13b60d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3afcca22e0081de935f7992c89083949b5c22cae6525b02407cf4615b13b60d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3afcca22e0081de935f7992c89083949b5c22cae6525b02407cf4615b13b60d", kill_on_drop: false }`
[INFO] [stdout] d3afcca22e0081de935f7992c89083949b5c22cae6525b02407cf4615b13b60d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e9a52738060b4e66481998e155b1ab313cb694290e5b40fc00953ea01583f096
[INFO] running `Command { std: "docker" "start" "-a" "e9a52738060b4e66481998e155b1ab313cb694290e5b40fc00953ea01583f096", kill_on_drop: false }`
[INFO] [stderr]     Checking thread_lake v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed for `ThreadLake<(), R>`
[INFO] [stdout]    --> src/lib.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let lake = Builder::new(2)
[INFO] [stdout]     |             ^^^^
[INFO] [stdout] 183 |             .names(|x: usize| format!("Panicable thread number {}", x))
[INFO] [stdout] 184 |             .spawn(|x: ThreadUtilities<_>| {
[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 `builder::Builder::<D>::spawn`
[INFO] [stdout]    --> src/builder.rs:60:37
[INFO] [stdout]     |
[INFO] [stdout] 59  |     pub fn spawn<R, M, F>(self, f: F) -> ThreadLake<D, R, M>
[INFO] [stdout]     |            ----- required by a bound in this associated function
[INFO] [stdout] 60  |         where M: Send + 'static, R: Send + 'static, F: Fn(ThreadUtilities<D, M>) -> R + Send + 'static + Clone +  Sync
[INFO] [stdout]     |                                     ^^^^ required by this bound in `Builder::<D>::spawn`
[INFO] [stdout] help: consider giving `lake` an explicit type, where the type for type parameter `R` is specified
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let lake: ThreadLake<(), R> = Builder::new(2)
[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] [stderr] error: could not compile `thread_lake` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e9a52738060b4e66481998e155b1ab313cb694290e5b40fc00953ea01583f096", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9a52738060b4e66481998e155b1ab313cb694290e5b40fc00953ea01583f096", kill_on_drop: false }`
[INFO] [stdout] e9a52738060b4e66481998e155b1ab313cb694290e5b40fc00953ea01583f096