[INFO] fetching crate ebml-iterable-specification-derive 0.4.0...
[INFO] checking ebml-iterable-specification-derive-0.4.0 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate ebml-iterable-specification-derive 0.4.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate ebml-iterable-specification-derive 0.4.0
[INFO] finished tweaking crates.io crate ebml-iterable-specification-derive 0.4.0
[INFO] tweaked toml for crates.io crate ebml-iterable-specification-derive 0.4.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ebml-iterable-specification-derive 0.4.0 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ebml-iterable-specification v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cee605ddd58996895f7e81031e38767636c285ff0683626f2d2dc51c11567f59
[INFO] running `Command { std: "docker" "start" "-a" "cee605ddd58996895f7e81031e38767636c285ff0683626f2d2dc51c11567f59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cee605ddd58996895f7e81031e38767636c285ff0683626f2d2dc51c11567f59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cee605ddd58996895f7e81031e38767636c285ff0683626f2d2dc51c11567f59", kill_on_drop: false }`
[INFO] [stdout] cee605ddd58996895f7e81031e38767636c285ff0683626f2d2dc51c11567f59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9f89307e80d7a510a3f098c61c657f9c62abab56a05685b299d35836a284f2e
[INFO] running `Command { std: "docker" "start" "-a" "e9f89307e80d7a510a3f098c61c657f9c62abab56a05685b299d35836a284f2e", kill_on_drop: false }`
[INFO] [stderr]     Checking ebml-iterable-specification v0.4.0
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking ebml-iterable-specification-derive v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `tokens` is never read
[INFO] [stdout]   --> src/ast.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Attribute<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 26 |     pub original: &'a syn::Attribute,
[INFO] [stdout] 27 |     pub tokens: &'a TokenStream,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tokens` is never read
[INFO] [stdout]   --> src/ast.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Attribute<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 26 |     pub original: &'a syn::Attribute,
[INFO] [stdout] 27 |     pub tokens: &'a TokenStream,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "e9f89307e80d7a510a3f098c61c657f9c62abab56a05685b299d35836a284f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9f89307e80d7a510a3f098c61c657f9c62abab56a05685b299d35836a284f2e", kill_on_drop: false }`
[INFO] [stdout] e9f89307e80d7a510a3f098c61c657f9c62abab56a05685b299d35836a284f2e