[INFO] fetching crate cotton 0.1.1...
[INFO] checking cotton-0.1.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate cotton 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate cotton 0.1.1 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 cotton 0.1.1
[INFO] finished tweaking crates.io crate cotton 0.1.1
[INFO] tweaked toml for crates.io crate cotton 0.1.1 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 134 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding cfg_aliases v0.1.1 (latest: v0.2.0)
[INFO] [stderr]       Adding errno v0.2.8 (latest: v0.3.8)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding stderrlog v0.5.4 (latest: v0.6.0)
[INFO] [stderr]       Adding termcolor v1.1.3 (latest: v1.4.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding zzz v0.2.1 (latest: v0.3.1)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded term_size v0.3.2
[INFO] [stderr]   Downloaded uninterruptible v0.1.0
[INFO] [stderr]   Downloaded shellwords v1.1.0
[INFO] [stderr]   Downloaded problem v5.3.0
[INFO] [stderr]   Downloaded option-ext v0.2.0
[INFO] [stderr]   Downloaded boolinator v2.4.0
[INFO] [stderr]   Downloaded maybe-string v0.1.0
[INFO] [stderr]   Downloaded error-context v0.1.2
[INFO] [stderr]   Downloaded dirs-sys v0.4.1
[INFO] [stderr]   Downloaded file-mode v0.1.2
[INFO] [stderr]   Downloaded linked_hash_set v0.1.4
[INFO] [stderr]   Downloaded cradle v0.2.2
[INFO] [stderr]   Downloaded exec v0.3.1
[INFO] [stderr]   Downloaded file-owner v0.1.2
[INFO] [stderr]   Downloaded mkargs v1.0.0
[INFO] [stderr]   Downloaded stderrlog v0.5.4
[INFO] [stderr]   Downloaded directories v5.0.1
[INFO] [stderr]   Downloaded nix v0.28.0
[INFO] [stderr]   Downloaded zzz v0.2.1
[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] 8983800a78726be11558336983f07804401819565c677c9503013fefcb35f7e0
[INFO] running `Command { std: "docker" "start" "-a" "8983800a78726be11558336983f07804401819565c677c9503013fefcb35f7e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8983800a78726be11558336983f07804401819565c677c9503013fefcb35f7e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8983800a78726be11558336983f07804401819565c677c9503013fefcb35f7e0", kill_on_drop: false }`
[INFO] [stdout] 8983800a78726be11558336983f07804401819565c677c9503013fefcb35f7e0
[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] 428fcaddf84be9f9c2a7fa9427a548ea5029406ac31bfffb54024e6c6b0bd317
[INFO] running `Command { std: "docker" "start" "-a" "428fcaddf84be9f9c2a7fa9427a548ea5029406ac31bfffb54024e6c6b0bd317", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking anstyle-parse v0.2.3
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]     Checking anstyle-query v1.0.2
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking option-ext v0.2.0
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]     Checking errno v0.2.8
[INFO] [stderr]     Checking dirs-sys v0.4.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking shellwords v1.1.0
[INFO] [stderr]     Checking exec v0.3.1
[INFO] [stderr]     Checking linked_hash_set v0.1.4
[INFO] [stderr]     Checking directories v5.0.1
[INFO] [stderr]     Checking zzz v0.2.1
[INFO] [stderr]     Checking problem v5.3.0
[INFO] [stderr]     Checking file-mode v0.1.2
[INFO] [stderr]     Checking filetime v0.2.23
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking anstream v0.6.13
[INFO] [stderr]     Checking boolinator v2.4.0
[INFO] [stderr]     Checking mkargs v1.0.0
[INFO] [stderr]     Checking error-context v0.1.2
[INFO] [stderr]     Checking maybe-string v0.1.0
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking uninterruptible v0.1.0
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking cradle v0.2.2
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]     Checking file-owner v0.1.2
[INFO] [stderr]     Checking stderrlog v0.5.4
[INFO] [stderr]    Compiling clap_derive v4.5.4
[INFO] [stderr]     Checking clap v4.5.4
[INFO] [stderr]     Checking cotton v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `hex` is imported redundantly
[INFO] [stdout]   --> src/hashing.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | use hex::{self, FromHexError};
[INFO] [stdout]    |           ^^^^ the item `hex` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hex` is imported redundantly
[INFO] [stdout]   --> src/hashing.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | use hex::{self, FromHexError};
[INFO] [stdout]    |           ^^^^ the item `hex` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.95s
[INFO] running `Command { std: "docker" "inspect" "428fcaddf84be9f9c2a7fa9427a548ea5029406ac31bfffb54024e6c6b0bd317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "428fcaddf84be9f9c2a7fa9427a548ea5029406ac31bfffb54024e6c6b0bd317", kill_on_drop: false }`
[INFO] [stdout] 428fcaddf84be9f9c2a7fa9427a548ea5029406ac31bfffb54024e6c6b0bd317