[INFO] fetching crate autojson 0.1.0...
[INFO] checking autojson-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate autojson 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate autojson 0.1.0 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 autojson 0.1.0
[INFO] finished tweaking crates.io crate autojson 0.1.0
[INFO] tweaked toml for crates.io crate autojson 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 26 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[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] 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e8a59fd2b5645be00f5da6ff5364c41793790e12a4f96e628c52c2105249a74
[INFO] running `Command { std: "docker" "start" "-a" "3e8a59fd2b5645be00f5da6ff5364c41793790e12a4f96e628c52c2105249a74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e8a59fd2b5645be00f5da6ff5364c41793790e12a4f96e628c52c2105249a74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e8a59fd2b5645be00f5da6ff5364c41793790e12a4f96e628c52c2105249a74", kill_on_drop: false }`
[INFO] [stdout] 3e8a59fd2b5645be00f5da6ff5364c41793790e12a4f96e628c52c2105249a74
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ba5f7c574c82c61d6871179c31fd5dbb466977d427a24df8dedf6070bfb767b
[INFO] running `Command { std: "docker" "start" "-a" "3ba5f7c574c82c61d6871179c31fd5dbb466977d427a24df8dedf6070bfb767b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking autojson v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `from_json` and `to_json` are never used
[INFO] [stdout]   --> src/lib.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |         impl $type {
[INFO] [stdout]    |         ---------- associated items in this implementation
[INFO] [stdout] 23 |
[INFO] [stdout] 24 |             fn from_json<P: AsRef<std::path::Path>>(path: P) -> Result<Self, failure::Error> {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |             fn to_json<P: AsRef<std::path::Path>>(&self, path: P) -> Result<(), failure::Error> {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     auto_json_impl!(Data);
[INFO] [stdout]    |     --------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `auto_json_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.82s
[INFO] running `Command { std: "docker" "inspect" "3ba5f7c574c82c61d6871179c31fd5dbb466977d427a24df8dedf6070bfb767b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ba5f7c574c82c61d6871179c31fd5dbb466977d427a24df8dedf6070bfb767b", kill_on_drop: false }`
[INFO] [stdout] 3ba5f7c574c82c61d6871179c31fd5dbb466977d427a24df8dedf6070bfb767b