[INFO] fetching crate b-tree 0.3.0...
[INFO] checking b-tree-0.3.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate b-tree 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate b-tree 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 b-tree 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate b-tree 0.3.0
[INFO] tweaked toml for crates.io crate b-tree 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate b-tree 0.3.0 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures v0.3.29
[INFO] [stderr]   Downloaded futures-sink v0.3.29
[INFO] [stderr]   Downloaded futures-task v0.3.29
[INFO] [stderr]   Downloaded get-size v0.1.4
[INFO] [stderr]   Downloaded uuid v1.5.0
[INFO] [stderr]   Downloaded safecast v0.2.1
[INFO] [stderr]   Downloaded quote-use-macros v0.7.2
[INFO] [stderr]   Downloaded quote-use v0.7.2
[INFO] [stderr]   Downloaded collection_literals v1.0.1
[INFO] [stderr]   Downloaded destream v0.7.2
[INFO] [stderr]   Downloaded derive-where v1.2.5
[INFO] [stderr]   Downloaded attribute-derive-macro v0.6.1
[INFO] [stderr]   Downloaded collate v0.4.0
[INFO] [stderr]   Downloaded semver v1.0.20
[INFO] [stderr]   Downloaded interpolator v0.5.0
[INFO] [stderr]   Downloaded proc-macro-utils v0.8.0
[INFO] [stderr]   Downloaded attribute-derive v0.6.1
[INFO] [stderr]   Downloaded tokio v1.33.0
[INFO] [stderr]   Downloaded ds-ext v0.1.3
[INFO] [stderr]   Downloaded async-trait v0.1.74
[INFO] [stderr]   Downloaded base64 v0.21.5
[INFO] [stderr]   Downloaded tbon v0.5.1
[INFO] [stderr]   Downloaded freqfs v0.9.0
[INFO] [stderr]   Downloaded futures-executor v0.3.29
[INFO] [stderr]   Downloaded futures-channel v0.3.29
[INFO] [stderr]   Downloaded futures-core v0.3.29
[INFO] [stderr]   Downloaded futures-io v0.3.29
[INFO] [stderr]   Downloaded futures-util v0.3.29
[INFO] [stderr]   Downloaded get-size-derive v0.1.3
[INFO] [stderr]   Downloaded num-derive v0.4.1
[INFO] [stderr]   Downloaded futures-macro v0.3.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e94f891b1a7c2c322711e1c2c09166a17dfb72ae9c0e0ab7398235fda99079ce
[INFO] running `Command { std: "docker" "start" "-a" "e94f891b1a7c2c322711e1c2c09166a17dfb72ae9c0e0ab7398235fda99079ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e94f891b1a7c2c322711e1c2c09166a17dfb72ae9c0e0ab7398235fda99079ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e94f891b1a7c2c322711e1c2c09166a17dfb72ae9c0e0ab7398235fda99079ce", kill_on_drop: false }`
[INFO] [stdout] e94f891b1a7c2c322711e1c2c09166a17dfb72ae9c0e0ab7398235fda99079ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 4e0f2956405c1d51e1ac8c7134508dbeeb3b235023cff1f3bcaec5c0772b3a7a
[INFO] running `Command { std: "docker" "start" "-a" "4e0f2956405c1d51e1ac8c7134508dbeeb3b235023cff1f3bcaec5c0772b3a7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling futures-task v0.3.29
[INFO] [stderr]    Compiling smallvec v1.11.1
[INFO] [stderr]    Compiling futures-channel v0.3.29
[INFO] [stderr]     Checking futures-sink v0.3.29
[INFO] [stderr]    Compiling interpolator v0.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling collection_literals v1.0.1
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]    Compiling async-trait v0.1.74
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking get-size v0.1.4
[INFO] [stderr]     Checking safecast v0.2.1
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]     Checking collate v0.4.0
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling proc-macro-utils v0.8.0
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking uuid v1.5.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling derive-where v1.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]     Checking tokio v1.33.0
[INFO] [stderr]     Checking pin-project v1.1.3
[INFO] [stderr]    Compiling quote-use-macros v0.7.2
[INFO] [stderr]    Compiling quote-use v0.7.2
[INFO] [stderr]    Compiling attribute-derive-macro v0.6.1
[INFO] [stderr]    Compiling attribute-derive v0.6.1
[INFO] [stderr]    Compiling get-size-derive v0.1.3
[INFO] [stderr]     Checking futures-executor v0.3.29
[INFO] [stderr]     Checking futures v0.3.29
[INFO] [stderr]     Checking ds-ext v0.1.3
[INFO] [stderr]     Checking freqfs v0.9.0
[INFO] [stderr]     Checking b-tree v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.70s
[INFO] running `Command { std: "docker" "inspect" "4e0f2956405c1d51e1ac8c7134508dbeeb3b235023cff1f3bcaec5c0772b3a7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e0f2956405c1d51e1ac8c7134508dbeeb3b235023cff1f3bcaec5c0772b3a7a", kill_on_drop: false }`
[INFO] [stdout] 4e0f2956405c1d51e1ac8c7134508dbeeb3b235023cff1f3bcaec5c0772b3a7a