[INFO] cloning repository https://github.com/relativehysteria/the_hundred_prisoners
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/relativehysteria/the_hundred_prisoners" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frelativehysteria%2Fthe_hundred_prisoners", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frelativehysteria%2Fthe_hundred_prisoners'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84e319cb3b1b4f9de60873a67031c2a0a428d882
[INFO] checking relativehysteria/the_hundred_prisoners against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frelativehysteria%2Fthe_hundred_prisoners" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/relativehysteria/the_hundred_prisoners 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/relativehysteria/the_hundred_prisoners
[INFO] finished tweaking git repo https://github.com/relativehysteria/the_hundred_prisoners
[INFO] tweaked toml for git repo https://github.com/relativehysteria/the_hundred_prisoners written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/relativehysteria/the_hundred_prisoners 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-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] 1c092ca5ce8c0c6a139c7bcdb92735411a5a49f39c290981d7c57968414cc227
[INFO] running `Command { std: "docker" "start" "-a" "1c092ca5ce8c0c6a139c7bcdb92735411a5a49f39c290981d7c57968414cc227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c092ca5ce8c0c6a139c7bcdb92735411a5a49f39c290981d7c57968414cc227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c092ca5ce8c0c6a139c7bcdb92735411a5a49f39c290981d7c57968414cc227", kill_on_drop: false }`
[INFO] [stdout] 1c092ca5ce8c0c6a139c7bcdb92735411a5a49f39c290981d7c57968414cc227
[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] 2aa7936f5c6a4762d698c3c3962d7b5dc4e7e72779f2e593db9d3bbcf8acfa07
[INFO] running `Command { std: "docker" "start" "-a" "2aa7936f5c6a4762d698c3c3962d7b5dc4e7e72779f2e593db9d3bbcf8acfa07", kill_on_drop: false }`
[INFO] [stderr]     Checking the_hundred_prisoners v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "2aa7936f5c6a4762d698c3c3962d7b5dc4e7e72779f2e593db9d3bbcf8acfa07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aa7936f5c6a4762d698c3c3962d7b5dc4e7e72779f2e593db9d3bbcf8acfa07", kill_on_drop: false }`
[INFO] [stdout] 2aa7936f5c6a4762d698c3c3962d7b5dc4e7e72779f2e593db9d3bbcf8acfa07
[INFO] checking relativehysteria/the_hundred_prisoners against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frelativehysteria%2Fthe_hundred_prisoners" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/relativehysteria/the_hundred_prisoners 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/relativehysteria/the_hundred_prisoners
[INFO] finished tweaking git repo https://github.com/relativehysteria/the_hundred_prisoners
[INFO] tweaked toml for git repo https://github.com/relativehysteria/the_hundred_prisoners written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/relativehysteria/the_hundred_prisoners 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-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] ff40ad81af773fcebd16a2f912dd6b2c915249e15010ce2098962e18b37f521a
[INFO] running `Command { std: "docker" "start" "-a" "ff40ad81af773fcebd16a2f912dd6b2c915249e15010ce2098962e18b37f521a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff40ad81af773fcebd16a2f912dd6b2c915249e15010ce2098962e18b37f521a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff40ad81af773fcebd16a2f912dd6b2c915249e15010ce2098962e18b37f521a", kill_on_drop: false }`
[INFO] [stdout] ff40ad81af773fcebd16a2f912dd6b2c915249e15010ce2098962e18b37f521a
[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] 0041e8bb4b9fa0900b7471b06a88a0b65e353f332e130bea2d46641cf7f9f509
[INFO] running `Command { std: "docker" "start" "-a" "0041e8bb4b9fa0900b7471b06a88a0b65e353f332e130bea2d46641cf7f9f509", kill_on_drop: false }`
[INFO] [stderr]     Checking the_hundred_prisoners v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed for `JoinHandle<T>`
[INFO] [stdout]   --> src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |           let thread = std::thread::spawn(move || {
[INFO] [stdout]    |  _____________^^^^^^___-
[INFO] [stdout] 39 | |             search_function();
[INFO] [stdout] 40 | |         });
[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 `thread` an explicit type, where the type for type parameter `T` is specified
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let thread: JoinHandle<T> = std::thread::spawn(move || {
[INFO] [stdout]    |                   +++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed for `JoinHandle<T>`
[INFO] [stdout]   --> src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |           let thread = std::thread::spawn(move || {
[INFO] [stdout]    |  _____________^^^^^^___-
[INFO] [stdout] 39 | |             search_function();
[INFO] [stdout] 40 | |         });
[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 `thread` an explicit type, where the type for type parameter `T` is specified
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let thread: JoinHandle<T> = std::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 `the_hundred_prisoners` (bin "the_hundred_prisoners") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `the_hundred_prisoners` (bin "the_hundred_prisoners" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "0041e8bb4b9fa0900b7471b06a88a0b65e353f332e130bea2d46641cf7f9f509", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0041e8bb4b9fa0900b7471b06a88a0b65e353f332e130bea2d46641cf7f9f509", kill_on_drop: false }`
[INFO] [stdout] 0041e8bb4b9fa0900b7471b06a88a0b65e353f332e130bea2d46641cf7f9f509