[INFO] fetching crate cpuburn 0.1.1...
[INFO] checking cpuburn-0.1.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate cpuburn 0.1.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate cpuburn 0.1.1 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 cpuburn 0.1.1
[INFO] finished tweaking crates.io crate cpuburn 0.1.1
[INFO] tweaked toml for crates.io crate cpuburn 0.1.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate cpuburn 0.1.1 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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] a6ac04d6ea52dd9efedab23b8c650cc439caa04df59c11d0958fb09fd934559c
[INFO] running `Command { std: "docker" "start" "-a" "a6ac04d6ea52dd9efedab23b8c650cc439caa04df59c11d0958fb09fd934559c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6ac04d6ea52dd9efedab23b8c650cc439caa04df59c11d0958fb09fd934559c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6ac04d6ea52dd9efedab23b8c650cc439caa04df59c11d0958fb09fd934559c", kill_on_drop: false }`
[INFO] [stdout] a6ac04d6ea52dd9efedab23b8c650cc439caa04df59c11d0958fb09fd934559c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] fd50d724259acd01364ac71c04452dccaf6471e89d8374830a91f5c8b558b38c
[INFO] running `Command { std: "docker" "start" "-a" "fd50d724259acd01364ac71c04452dccaf6471e89d8374830a91f5c8b558b38c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking cpuburn v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "fd50d724259acd01364ac71c04452dccaf6471e89d8374830a91f5c8b558b38c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd50d724259acd01364ac71c04452dccaf6471e89d8374830a91f5c8b558b38c", kill_on_drop: false }`
[INFO] [stdout] fd50d724259acd01364ac71c04452dccaf6471e89d8374830a91f5c8b558b38c
[INFO] checking cpuburn-0.1.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate cpuburn 0.1.1 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate cpuburn 0.1.1 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 cpuburn 0.1.1
[INFO] finished tweaking crates.io crate cpuburn 0.1.1
[INFO] tweaked toml for crates.io crate cpuburn 0.1.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate cpuburn 0.1.1 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] ce3b337f012c6c3e1e8fd6b68fa3b909fd019e366780d4e70a3a1d56f734386b
[INFO] running `Command { std: "docker" "start" "-a" "ce3b337f012c6c3e1e8fd6b68fa3b909fd019e366780d4e70a3a1d56f734386b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce3b337f012c6c3e1e8fd6b68fa3b909fd019e366780d4e70a3a1d56f734386b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce3b337f012c6c3e1e8fd6b68fa3b909fd019e366780d4e70a3a1d56f734386b", kill_on_drop: false }`
[INFO] [stdout] ce3b337f012c6c3e1e8fd6b68fa3b909fd019e366780d4e70a3a1d56f734386b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] cef5c875136d2deeeaec526286a8cebe00cf8289c563f0d55153fce61c7cee9f
[INFO] running `Command { std: "docker" "start" "-a" "cef5c875136d2deeeaec526286a8cebe00cf8289c563f0d55153fce61c7cee9f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking cpuburn v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]  --> src/main.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 |         std::thread::spawn(|| loop {});
[INFO] [stdout]   |                            ^^
[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: try giving this closure an explicit return type
[INFO] [stdout]   |
[INFO] [stdout] 3 |         std::thread::spawn(|| -> /* Type */ { loop {} });
[INFO] [stdout]   |                               +++++++++++++++         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]  --> src/main.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 |         std::thread::spawn(|| loop {});
[INFO] [stdout]   |                            ^^
[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: try giving this closure an explicit return type
[INFO] [stdout]   |
[INFO] [stdout] 3 |         std::thread::spawn(|| -> /* Type */ { loop {} });
[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 `cpuburn` (bin "cpuburn") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `cpuburn` (bin "cpuburn" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "cef5c875136d2deeeaec526286a8cebe00cf8289c563f0d55153fce61c7cee9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cef5c875136d2deeeaec526286a8cebe00cf8289c563f0d55153fce61c7cee9f", kill_on_drop: false }`
[INFO] [stdout] cef5c875136d2deeeaec526286a8cebe00cf8289c563f0d55153fce61c7cee9f