[INFO] fetching crate hamster 0.0.4...
[INFO] checking hamster-0.0.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate hamster 0.0.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate hamster 0.0.4 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hamster 0.0.4
[INFO] finished tweaking crates.io crate hamster 0.0.4
[INFO] tweaked toml for crates.io crate hamster 0.0.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate hamster 0.0.4 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-serde v0.1.1
[INFO] [stderr]   Downloaded tracing-core v0.1.10
[INFO] [stderr]   Downloaded dtoa v0.4.5
[INFO] [stderr]   Downloaded serde_yaml v0.8.11
[INFO] [stderr]   Downloaded yaml-rust v0.4.3
[INFO] [stderr]   Downloaded blake2b_simd v0.5.10
[INFO] [stderr]   Downloaded subprocess v0.2.4
[INFO] [stderr]   Downloaded serde_json v1.0.51
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.5
[INFO] [stderr]   Downloaded linked-hash-map v0.5.2
[INFO] [stderr]   Downloaded yaml-merge-keys v0.4.0
[INFO] [stderr]   Downloaded rust-argon2 v0.7.0
[INFO] [stderr]   Downloaded redox_users v0.3.4
[INFO] [stderr]   Downloaded dirs-sys v0.3.4
[INFO] [stderr]   Downloaded shellexpand v2.0.0
[INFO] [stderr]   Downloaded sharded-slab v0.0.9
[INFO] [stderr]   Downloaded tracing-log v0.1.1
[INFO] [stderr]   Downloaded tracing v0.1.13
[INFO] [stderr]   Downloaded gitlab_ci_parser v0.0.5
[INFO] [stderr]   Downloaded git_info v0.1.1
[INFO] [stderr]   Downloaded tracing-attributes v0.1.7
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 135373924fb2bac889a2b3e7ac0c05f669e199f841abfe46eb2b24f2809dfc98
[INFO] running `Command { std: "docker" "start" "-a" "135373924fb2bac889a2b3e7ac0c05f669e199f841abfe46eb2b24f2809dfc98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "135373924fb2bac889a2b3e7ac0c05f669e199f841abfe46eb2b24f2809dfc98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "135373924fb2bac889a2b3e7ac0c05f669e199f841abfe46eb2b24f2809dfc98", kill_on_drop: false }`
[INFO] [stdout] 135373924fb2bac889a2b3e7ac0c05f669e199f841abfe46eb2b24f2809dfc98
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e30b251e3782dadf96863174fa305b384c35bb504f84c787a49d66d596aa4c5b
[INFO] running `Command { std: "docker" "start" "-a" "e30b251e3782dadf96863174fa305b384c35bb504f84c787a49d66d596aa4c5b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking dtoa v0.4.5
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking sharded-slab v0.0.9
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking shellexpand v2.0.0
[INFO] [stderr]     Checking subprocess v0.2.4
[INFO] [stderr]     Checking git_info v0.1.1
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking serde_yaml v0.8.11
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking tracing-subscriber v0.2.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.15
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking thiserror v1.0.15
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking yaml-merge-keys v0.4.0
[INFO] [stderr]     Checking gitlab_ci_parser v0.0.5
[INFO] [stderr]     Checking hamster v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `shellexpand` is imported redundantly
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use shellexpand;
[INFO] [stdout]   |     ^^^^^^^^^^^ the item `shellexpand` 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 `tracing_subscriber` is imported redundantly
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tracing_subscriber;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ the item `tracing_subscriber` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `shellexpand` is imported redundantly
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use shellexpand;
[INFO] [stdout]   |     ^^^^^^^^^^^ the item `shellexpand` 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 `tracing_subscriber` is imported redundantly
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tracing_subscriber;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ the item `tracing_subscriber` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.76s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e30b251e3782dadf96863174fa305b384c35bb504f84c787a49d66d596aa4c5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e30b251e3782dadf96863174fa305b384c35bb504f84c787a49d66d596aa4c5b", kill_on_drop: false }`
[INFO] [stdout] e30b251e3782dadf96863174fa305b384c35bb504f84c787a49d66d596aa4c5b