[INFO] fetching crate syn-args-derive 0.2.1...
[INFO] checking syn-args-derive-0.2.1 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate syn-args-derive 0.2.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate syn-args-derive 0.2.1 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syn-args-derive 0.2.1
[INFO] finished tweaking crates.io crate syn-args-derive 0.2.1
[INFO] tweaked toml for crates.io crate syn-args-derive 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 22 packages to latest compatible versions
[INFO] [stderr]       Adding encode_unicode v0.3.6 (latest: v1.0.0)
[INFO] [stderr]       Adding windows-sys v0.52.0 (latest: v0.59.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f40794406e26805dcc095b106959aabfb91371ffd3958d64b5b1bf90b935bf77
[INFO] running `Command { std: "docker" "start" "-a" "f40794406e26805dcc095b106959aabfb91371ffd3958d64b5b1bf90b935bf77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f40794406e26805dcc095b106959aabfb91371ffd3958d64b5b1bf90b935bf77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f40794406e26805dcc095b106959aabfb91371ffd3958d64b5b1bf90b935bf77", kill_on_drop: false }`
[INFO] [stdout] f40794406e26805dcc095b106959aabfb91371ffd3958d64b5b1bf90b935bf77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e82a3bf16d980aa8ff296d6554496cf57646bdf1e5dbb05cf88f54f79c41b84f
[INFO] running `Command { std: "docker" "start" "-a" "e82a3bf16d980aa8ff296d6554496cf57646bdf1e5dbb05cf88f54f79c41b84f", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking similar v2.6.0
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]     Checking syn v2.0.77
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]     Checking insta v1.39.0
[INFO] [stderr]     Checking syn-args-derive v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/macro_impl.rs:41:18
[INFO] [stdout]    |
[INFO] [stdout] 41 |             for (j, field_value) in variant_fields_value.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/macro_impl.rs:41:18
[INFO] [stdout]    |
[INFO] [stdout] 41 |             for (j, field_value) in variant_fields_value.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.17s
[INFO] running `Command { std: "docker" "inspect" "e82a3bf16d980aa8ff296d6554496cf57646bdf1e5dbb05cf88f54f79c41b84f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e82a3bf16d980aa8ff296d6554496cf57646bdf1e5dbb05cf88f54f79c41b84f", kill_on_drop: false }`
[INFO] [stdout] e82a3bf16d980aa8ff296d6554496cf57646bdf1e5dbb05cf88f54f79c41b84f