[INFO] fetching crate tcp-test 0.1.0...
[INFO] checking tcp-test-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate tcp-test 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate tcp-test 0.1.0 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 tcp-test 0.1.0
[INFO] finished tweaking crates.io crate tcp-test 0.1.0
[INFO] tweaked toml for crates.io crate tcp-test 0.1.0 written to /workspace/builds/worker-3-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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages
[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] d983aae775a29b5284c0631468487b2f41f3938774b90fd6c897a3e516c238ae
[INFO] running `Command { std: "docker" "start" "-a" "d983aae775a29b5284c0631468487b2f41f3938774b90fd6c897a3e516c238ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d983aae775a29b5284c0631468487b2f41f3938774b90fd6c897a3e516c238ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d983aae775a29b5284c0631468487b2f41f3938774b90fd6c897a3e516c238ae", kill_on_drop: false }`
[INFO] [stdout] d983aae775a29b5284c0631468487b2f41f3938774b90fd6c897a3e516c238ae
[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] 342c5909162334526af10349176634e1c0270d0de293ad45821d54c7113298af
[INFO] running `Command { std: "docker" "start" "-a" "342c5909162334526af10349176634e1c0270d0de293ad45821d54c7113298af", kill_on_drop: false }`
[INFO] [stderr]     Checking tcp-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "342c5909162334526af10349176634e1c0270d0de293ad45821d54c7113298af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "342c5909162334526af10349176634e1c0270d0de293ad45821d54c7113298af", kill_on_drop: false }`
[INFO] [stdout] 342c5909162334526af10349176634e1c0270d0de293ad45821d54c7113298af
[INFO] checking tcp-test-0.1.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate tcp-test 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate tcp-test 0.1.0 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 tcp-test 0.1.0
[INFO] finished tweaking crates.io crate tcp-test 0.1.0
[INFO] tweaked toml for crates.io crate tcp-test 0.1.0 written to /workspace/builds/worker-3-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] [stderr]     Updating crates.io index
[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] [stderr]     Blocking waiting for file lock on package cache
[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] d577fd863c22bd350c0439d3a2bd66ec8e757f28580c6f8e51e109b18f7c0acc
[INFO] running `Command { std: "docker" "start" "-a" "d577fd863c22bd350c0439d3a2bd66ec8e757f28580c6f8e51e109b18f7c0acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d577fd863c22bd350c0439d3a2bd66ec8e757f28580c6f8e51e109b18f7c0acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d577fd863c22bd350c0439d3a2bd66ec8e757f28580c6f8e51e109b18f7c0acc", kill_on_drop: false }`
[INFO] [stdout] d577fd863c22bd350c0439d3a2bd66ec8e757f28580c6f8e51e109b18f7c0acc
[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] ea0dffa43a7e001a867dd115b4c504b9eeb0ef655e6e7accc7c8edb17e4d8b8e
[INFO] running `Command { std: "docker" "start" "-a" "ea0dffa43a7e001a867dd115b4c504b9eeb0ef655e6e7accc7c8edb17e4d8b8e", kill_on_drop: false }`
[INFO] [stderr]     Checking tcp-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/lib.rs:91:20
[INFO] [stdout]    |
[INFO] [stdout] 91 |             .spawn(move || loop {
[INFO] [stdout]    |              ----- ^^^^^^^
[INFO] [stdout]    |              |
[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::spawn`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:381:5
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 91 ~             .spawn(move || -> /* Type */ { loop {
[INFO] [stdout] 92 |                 receiver
[INFO] [stdout]  ...
[INFO] [stdout] 105|                     .expect(concat!("Sender::send() at init(), line ", line!()));
[INFO] [stdout] 106~             } })
[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[E0283]: type annotations needed
[INFO] [stdout]   --> src/lib.rs:91:20
[INFO] [stdout]    |
[INFO] [stdout] 91 |             .spawn(move || loop {
[INFO] [stdout]    |              ----- ^^^^^^^
[INFO] [stdout]    |              |
[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::spawn`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:381:5
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 91 ~             .spawn(move || -> /* Type */ { loop {
[INFO] [stdout] 92 |                 receiver
[INFO] [stdout]  ...
[INFO] [stdout] 105|                     .expect(concat!("Sender::send() at init(), line ", line!()));
[INFO] [stdout] 106~             } })
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tcp-test` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `tcp-test` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ea0dffa43a7e001a867dd115b4c504b9eeb0ef655e6e7accc7c8edb17e4d8b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea0dffa43a7e001a867dd115b4c504b9eeb0ef655e6e7accc7c8edb17e4d8b8e", kill_on_drop: false }`
[INFO] [stdout] ea0dffa43a7e001a867dd115b4c504b9eeb0ef655e6e7accc7c8edb17e4d8b8e