[INFO] fetching crate rw-cell 1.0.0...
[INFO] checking rw-cell-1.0.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate rw-cell 1.0.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate rw-cell 1.0.0 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 rw-cell 1.0.0
[INFO] finished tweaking crates.io crate rw-cell 1.0.0
[INFO] tweaked toml for crates.io crate rw-cell 1.0.0 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] 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] 40d3562f3cb34f5f9c2a6bae6595a312e8f8ecce74e74b389f9ccb1eb02a6f04
[INFO] running `Command { std: "docker" "start" "-a" "40d3562f3cb34f5f9c2a6bae6595a312e8f8ecce74e74b389f9ccb1eb02a6f04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40d3562f3cb34f5f9c2a6bae6595a312e8f8ecce74e74b389f9ccb1eb02a6f04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40d3562f3cb34f5f9c2a6bae6595a312e8f8ecce74e74b389f9ccb1eb02a6f04", kill_on_drop: false }`
[INFO] [stdout] 40d3562f3cb34f5f9c2a6bae6595a312e8f8ecce74e74b389f9ccb1eb02a6f04
[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] 30c15fe4fd77a56c0d919f906d02e967e2471ad7beb5018da619f4a2d042fe3b
[INFO] running `Command { std: "docker" "start" "-a" "30c15fe4fd77a56c0d919f906d02e967e2471ad7beb5018da619f4a2d042fe3b", kill_on_drop: false }`
[INFO] [stderr]     Checking rw-cell v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "30c15fe4fd77a56c0d919f906d02e967e2471ad7beb5018da619f4a2d042fe3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30c15fe4fd77a56c0d919f906d02e967e2471ad7beb5018da619f4a2d042fe3b", kill_on_drop: false }`
[INFO] [stdout] 30c15fe4fd77a56c0d919f906d02e967e2471ad7beb5018da619f4a2d042fe3b
[INFO] checking rw-cell-1.0.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate rw-cell 1.0.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate rw-cell 1.0.0 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 rw-cell 1.0.0
[INFO] finished tweaking crates.io crate rw-cell 1.0.0
[INFO] tweaked toml for crates.io crate rw-cell 1.0.0 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] 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] 82828e7923ac210058d31df7b4662143b862622ff7db592c3974c62429067f70
[INFO] running `Command { std: "docker" "start" "-a" "82828e7923ac210058d31df7b4662143b862622ff7db592c3974c62429067f70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82828e7923ac210058d31df7b4662143b862622ff7db592c3974c62429067f70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82828e7923ac210058d31df7b4662143b862622ff7db592c3974c62429067f70", kill_on_drop: false }`
[INFO] [stdout] 82828e7923ac210058d31df7b4662143b862622ff7db592c3974c62429067f70
[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] 8e0254dcef11d859b4fa853394ddc1e0e60de6e1a44659b9726defe7974ed7d8
[INFO] running `Command { std: "docker" "start" "-a" "8e0254dcef11d859b4fa853394ddc1e0e60de6e1a44659b9726defe7974ed7d8", kill_on_drop: false }`
[INFO] [stderr]     Checking rw-cell v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/mwsr.rs:160:28
[INFO] [stdout]     |
[INFO] [stdout] 160 |         std::thread::spawn(move || 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] 160 ~         std::thread::spawn(move || -> /* Type */ { loop {
[INFO] [stdout] 161 |             w0.write(vec!["Slovakia"; 1001])
[INFO] [stdout] 162 ~         } });
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/swmr.rs:210:28
[INFO] [stdout]     |
[INFO] [stdout] 210 |         std::thread::spawn(move || 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] 210 ~         std::thread::spawn(move || -> /* Type */ { loop {
[INFO] [stdout] 211 |             for i in 0usize.. {
[INFO] [stdout]   ...
[INFO] [stdout] 221 |             }
[INFO] [stdout] 222 ~         } });
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rw-cell` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "8e0254dcef11d859b4fa853394ddc1e0e60de6e1a44659b9726defe7974ed7d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e0254dcef11d859b4fa853394ddc1e0e60de6e1a44659b9726defe7974ed7d8", kill_on_drop: false }`
[INFO] [stdout] 8e0254dcef11d859b4fa853394ddc1e0e60de6e1a44659b9726defe7974ed7d8