[INFO] fetching crate exonum-keys 1.0.0...
[INFO] checking exonum-keys-1.0.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate exonum-keys 1.0.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate exonum-keys 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 exonum-keys 1.0.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate exonum-keys 1.0.0
[INFO] tweaked toml for crates.io crate exonum-keys 1.0.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate exonum-keys 1.0.0 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 proc-macro-error v0.4.12
[INFO] [stderr]   Downloaded proc-macro2 v1.0.10
[INFO] [stderr]   Downloaded structopt-derive v0.4.5
[INFO] [stderr]   Downloaded quote v1.0.3
[INFO] [stderr]   Downloaded base64-serde v0.5.0
[INFO] [stderr]   Downloaded filetime v0.2.8
[INFO] [stderr]   Downloaded structopt v0.3.12
[INFO] [stderr]   Downloaded bit-vec v0.6.1
[INFO] [stderr]   Downloaded anyhow v1.0.28
[INFO] [stderr]   Downloaded exonum-derive v1.0.0
[INFO] [stderr]   Downloaded base64 v0.12.0
[INFO] [stderr]   Downloaded chrono v0.4.11
[INFO] [stderr]   Downloaded libc v0.2.68
[INFO] [stderr]   Downloaded protobuf v2.12.0
[INFO] [stderr]   Downloaded bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]   Downloaded syn v1.0.17
[INFO] [stderr]   Downloaded flate2 v1.0.14
[INFO] [stderr]   Downloaded serde_derive v1.0.105
[INFO] [stderr]   Downloaded serde_json v1.0.50
[INFO] [stderr]   Downloaded zip v0.5.5
[INFO] [stderr]   Downloaded miniz_oxide v0.3.6
[INFO] [stderr]   Downloaded ryu v1.0.3
[INFO] [stderr]   Downloaded exonum_sodiumoxide v0.0.23
[INFO] [stderr]   Downloaded winapi-util v0.1.4
[INFO] [stderr]   Downloaded exonum-build v1.0.0
[INFO] [stderr]   Downloaded protobuf-codegen v2.12.0
[INFO] [stderr]   Downloaded protoc v2.12.0
[INFO] [stderr]   Downloaded protoc-rust v2.12.0
[INFO] [stderr]   Downloaded protobuf-convert v0.4.0
[INFO] [stderr]   Downloaded exonum-proto v1.0.0
[INFO] [stderr]   Downloaded exonum-crypto v1.0.0
[INFO] [stderr]   Downloaded xattr v0.2.2
[INFO] [stderr]   Downloaded bzip2 v0.3.3
[INFO] [stderr]   Downloaded podio v0.1.6
[INFO] [stderr]   Downloaded exonum_libsodium-sys v0.0.23
[INFO] [stderr]   Downloaded hex-buffer-serde v0.2.1
[INFO] [stderr]   Downloaded pwbox v0.3.0
[INFO] [stderr]   Downloaded arrayvec v0.4.12
[INFO] [stderr]   Downloaded blake2-rfc v0.2.18
[INFO] [stderr]   Downloaded clear_on_drop v0.2.3
[INFO] [stderr]   Downloaded secret-tree v0.2.0
[INFO] [stderr]   Downloaded hermit-abi v0.1.10
[INFO] [stderr]   Downloaded proc-macro-error-attr v0.4.12
[INFO] [stderr]   Downloaded serde v1.0.105
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] d09b6b05859e27bcd1a00f25ee28586fb4505517fc7a2df9e35721326428ffa5
[INFO] running `Command { std: "docker" "start" "-a" "d09b6b05859e27bcd1a00f25ee28586fb4505517fc7a2df9e35721326428ffa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d09b6b05859e27bcd1a00f25ee28586fb4505517fc7a2df9e35721326428ffa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d09b6b05859e27bcd1a00f25ee28586fb4505517fc7a2df9e35721326428ffa5", kill_on_drop: false }`
[INFO] [stdout] d09b6b05859e27bcd1a00f25ee28586fb4505517fc7a2df9e35721326428ffa5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 9fa3e7ea8cf807dcbca8c80e39222b43a9668ea41c06023ea5b156577183eb10
[INFO] running `Command { std: "docker" "start" "-a" "9fa3e7ea8cf807dcbca8c80e39222b43a9668ea41c06023ea5b156577183eb10", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling protobuf v2.12.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling miniz_oxide v0.3.6
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling protoc v2.12.0
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking base64 v0.12.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling filetime v0.2.8
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking bit-vec v0.6.1
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]    Compiling bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]    Compiling clear_on_drop v0.2.3
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking secret-tree v0.2.0
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling zip v0.5.5
[INFO] [stderr]    Compiling exonum_libsodium-sys v0.0.23
[INFO] [stderr]     Checking base64-serde v0.5.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking hex-buffer-serde v0.2.1
[INFO] [stderr]     Checking serde_json v1.0.50
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking exonum_sodiumoxide v0.0.23
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling structopt-derive v0.4.5
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling exonum-derive v1.0.0
[INFO] [stderr]     Checking structopt v0.3.12
[INFO] [stderr]     Checking pwbox v0.3.0
[INFO] [stderr]    Compiling protobuf-codegen v2.12.0
[INFO] [stderr]    Compiling protoc-rust v2.12.0
[INFO] [stderr]    Compiling exonum-build v1.0.0
[INFO] [stderr]    Compiling protobuf-convert v0.4.0
[INFO] [stderr]    Compiling exonum-proto v1.0.0
[INFO] [stderr]    Compiling exonum-crypto v1.0.0
[INFO] [stderr]     Checking exonum-keys v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `hex` is imported redundantly
[INFO] [stdout]   --> examples/key_generator.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use hex;
[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]   --> examples/key_generator.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use hex;
[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 11.69s
[INFO] running `Command { std: "docker" "inspect" "9fa3e7ea8cf807dcbca8c80e39222b43a9668ea41c06023ea5b156577183eb10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fa3e7ea8cf807dcbca8c80e39222b43a9668ea41c06023ea5b156577183eb10", kill_on_drop: false }`
[INFO] [stdout] 9fa3e7ea8cf807dcbca8c80e39222b43a9668ea41c06023ea5b156577183eb10