[INFO] fetching crate writing 0.2.1...
[INFO] checking writing-0.2.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate writing 0.2.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate writing 0.2.1 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 writing 0.2.1
[INFO] finished tweaking crates.io crate writing 0.2.1
[INFO] tweaked toml for crates.io crate writing 0.2.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate writing 0.2.1 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 tree-sitter-javascript v0.19.0
[INFO] [stderr]   Downloaded guarding_parser v0.2.6
[INFO] [stderr]   Downloaded guarding_core v0.2.6
[INFO] [stderr]   Downloaded tree-sitter-java v0.19.0
[INFO] [stderr]   Downloaded tree-sitter-rust v0.19.0
[INFO] [stderr]   Downloaded tree-sitter v0.19.3
[INFO] [stderr]   Downloaded guarding_ident v0.2.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] c5889a0dd02c0192c16bb80570f6e5e657cf7cc40c82a8ced4c89231350a5a1b
[INFO] running `Command { std: "docker" "start" "-a" "c5889a0dd02c0192c16bb80570f6e5e657cf7cc40c82a8ced4c89231350a5a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5889a0dd02c0192c16bb80570f6e5e657cf7cc40c82a8ced4c89231350a5a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5889a0dd02c0192c16bb80570f6e5e657cf7cc40c82a8ced4c89231350a5a1b", kill_on_drop: false }`
[INFO] [stdout] c5889a0dd02c0192c16bb80570f6e5e657cf7cc40c82a8ced4c89231350a5a1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1fe094ffdf254edda48c77e949f15826829c82e4cc81b592cac6453927b9c1bb
[INFO] running `Command { std: "docker" "start" "-a" "1fe094ffdf254edda48c77e949f15826829c82e4cc81b592cac6453927b9c1bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling tree-sitter v0.19.3
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling tree-sitter-java v0.19.0
[INFO] [stderr]    Compiling tree-sitter-javascript v0.19.0
[INFO] [stderr]    Compiling tree-sitter-rust v0.19.0
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking os_str_bytes v4.2.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]     Checking clap v3.0.0-beta.5
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking guarding_parser v0.2.6
[INFO] [stderr]     Checking guarding_core v0.2.6
[INFO] [stderr]     Checking guarding_ident v0.2.6
[INFO] [stderr]     Checking writing v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.30s
[INFO] running `Command { std: "docker" "inspect" "1fe094ffdf254edda48c77e949f15826829c82e4cc81b592cac6453927b9c1bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fe094ffdf254edda48c77e949f15826829c82e4cc81b592cac6453927b9c1bb", kill_on_drop: false }`
[INFO] [stdout] 1fe094ffdf254edda48c77e949f15826829c82e4cc81b592cac6453927b9c1bb