[INFO] fetching crate syn_derive 0.1.8...
[INFO] checking syn_derive-0.1.8 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate syn_derive 0.1.8 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate syn_derive 0.1.8 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syn_derive 0.1.8
[INFO] finished tweaking crates.io crate syn_derive 0.1.8
[INFO] tweaked toml for crates.io crate syn_derive 0.1.8 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a9abd67a8bfdd0ef922e5c266bcb71816f14f3fe951d451cc95cf611947312b
[INFO] running `Command { std: "docker" "start" "-a" "8a9abd67a8bfdd0ef922e5c266bcb71816f14f3fe951d451cc95cf611947312b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a9abd67a8bfdd0ef922e5c266bcb71816f14f3fe951d451cc95cf611947312b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a9abd67a8bfdd0ef922e5c266bcb71816f14f3fe951d451cc95cf611947312b", kill_on_drop: false }`
[INFO] [stdout] 8a9abd67a8bfdd0ef922e5c266bcb71816f14f3fe951d451cc95cf611947312b
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3f706f9a140efb26661cf7191b5c8cc8b6613c0acb465e960e849fda5067db8
[INFO] running `Command { std: "docker" "start" "-a" "e3f706f9a140efb26661cf7191b5c8cc8b6613c0acb465e960e849fda5067db8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking proc-macro-error v1.0.4
[INFO] [stderr]     Checking syn_derive v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `warning` is never used
[INFO] [stdout]    --> src/lib.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | trait SpanError: Spanned {
[INFO] [stdout]     |       --------- method in this trait
[INFO] [stdout] 160 |     fn warning(&self, text: &str) -> Diagnostic {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `warning` is never used
[INFO] [stdout]    --> src/lib.rs:160:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | trait SpanError: Spanned {
[INFO] [stdout]     |       --------- method in this trait
[INFO] [stdout] 160 |     fn warning(&self, text: &str) -> Diagnostic {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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 0.95s
[INFO] running `Command { std: "docker" "inspect" "e3f706f9a140efb26661cf7191b5c8cc8b6613c0acb465e960e849fda5067db8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3f706f9a140efb26661cf7191b5c8cc8b6613c0acb465e960e849fda5067db8", kill_on_drop: false }`
[INFO] [stdout] e3f706f9a140efb26661cf7191b5c8cc8b6613c0acb465e960e849fda5067db8