[INFO] fetching crate spinning_top 0.3.0...
[INFO] checking spinning_top-0.3.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate spinning_top 0.3.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate spinning_top 0.3.0 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 spinning_top 0.3.0
[INFO] finished tweaking crates.io crate spinning_top 0.3.0
[INFO] tweaked toml for crates.io crate spinning_top 0.3.0 written to /workspace/builds/worker-5-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 14 packages
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] c80a91a1154d0fa761416e8e3f93897b8238754a37adce4a7fd2d743f54405a1
[INFO] running `Command { std: "docker" "start" "-a" "c80a91a1154d0fa761416e8e3f93897b8238754a37adce4a7fd2d743f54405a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c80a91a1154d0fa761416e8e3f93897b8238754a37adce4a7fd2d743f54405a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c80a91a1154d0fa761416e8e3f93897b8238754a37adce4a7fd2d743f54405a1", kill_on_drop: false }`
[INFO] [stdout] c80a91a1154d0fa761416e8e3f93897b8238754a37adce4a7fd2d743f54405a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a4f48491268e0159054b711eb7a6c846c5ee7913985e26401d79cbaaca63718f
[INFO] running `Command { std: "docker" "start" "-a" "a4f48491268e0159054b711eb7a6c846c5ee7913985e26401d79cbaaca63718f", kill_on_drop: false }`
[INFO] [stderr]     Checking spinning_top v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `AtomicUsize` is imported redundantly
[INFO] [stdout]    --> src/rw_spinlock.rs:280:29
[INFO] [stdout]     |
[INFO] [stdout] 280 |     use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]     |                             ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 287 |     use super::*;
[INFO] [stdout]     |         -------- the item `AtomicUsize` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ordering` is imported redundantly
[INFO] [stdout]    --> src/rw_spinlock.rs:280:42
[INFO] [stdout]     |
[INFO] [stdout] 280 |     use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 287 |     use super::*;
[INFO] [stdout]     |         -------- the item `Ordering` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "a4f48491268e0159054b711eb7a6c846c5ee7913985e26401d79cbaaca63718f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4f48491268e0159054b711eb7a6c846c5ee7913985e26401d79cbaaca63718f", kill_on_drop: false }`
[INFO] [stdout] a4f48491268e0159054b711eb7a6c846c5ee7913985e26401d79cbaaca63718f
[INFO] checking spinning_top-0.3.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate spinning_top 0.3.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate spinning_top 0.3.0 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 spinning_top 0.3.0
[INFO] finished tweaking crates.io crate spinning_top 0.3.0
[INFO] tweaked toml for crates.io crate spinning_top 0.3.0 written to /workspace/builds/worker-5-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3d55b5e1c5edf3118aebbe456710e1be58a3384967c6ba5d39736f545fa233b8
[INFO] running `Command { std: "docker" "start" "-a" "3d55b5e1c5edf3118aebbe456710e1be58a3384967c6ba5d39736f545fa233b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d55b5e1c5edf3118aebbe456710e1be58a3384967c6ba5d39736f545fa233b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d55b5e1c5edf3118aebbe456710e1be58a3384967c6ba5d39736f545fa233b8", kill_on_drop: false }`
[INFO] [stdout] 3d55b5e1c5edf3118aebbe456710e1be58a3384967c6ba5d39736f545fa233b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] dce2c56e8bc840097105fa438d068b58dea17784d22d91168ac3088768374b48
[INFO] running `Command { std: "docker" "start" "-a" "dce2c56e8bc840097105fa438d068b58dea17784d22d91168ac3088768374b48", kill_on_drop: false }`
[INFO] [stderr]     Checking spinning_top v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `AtomicUsize` is imported redundantly
[INFO] [stdout]    --> src/rw_spinlock.rs:280:29
[INFO] [stdout]     |
[INFO] [stdout] 280 |     use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]     |                             ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 287 |     use super::*;
[INFO] [stdout]     |         -------- the item `AtomicUsize` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ordering` is imported redundantly
[INFO] [stdout]    --> src/rw_spinlock.rs:280:42
[INFO] [stdout]     |
[INFO] [stdout] 280 |     use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 287 |     use super::*;
[INFO] [stdout]     |         -------- the item `Ordering` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/rw_spinlock.rs:407:13
[INFO] [stdout]     |
[INFO] [stdout] 407 |             panic!();
[INFO] [stdout]     |             ^^^^^^^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spinning_top` (lib test) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "dce2c56e8bc840097105fa438d068b58dea17784d22d91168ac3088768374b48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dce2c56e8bc840097105fa438d068b58dea17784d22d91168ac3088768374b48", kill_on_drop: false }`
[INFO] [stdout] dce2c56e8bc840097105fa438d068b58dea17784d22d91168ac3088768374b48