[INFO] fetching crate aktrs-macros 0.1.0-alpha.2...
[INFO] checking aktrs-macros-0.1.0-alpha.2 against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] extracting crate aktrs-macros 0.1.0-alpha.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate aktrs-macros 0.1.0-alpha.2
[INFO] finished tweaking crates.io crate aktrs-macros 0.1.0-alpha.2
[INFO] tweaked toml for crates.io crate aktrs-macros 0.1.0-alpha.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate aktrs-macros 0.1.0-alpha.2 on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking aktrs-macros-0.1.0-alpha.2 against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] extracting crate aktrs-macros 0.1.0-alpha.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate aktrs-macros 0.1.0-alpha.2
[INFO] finished tweaking crates.io crate aktrs-macros 0.1.0-alpha.2
[INFO] tweaked toml for crates.io crate aktrs-macros 0.1.0-alpha.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate aktrs-macros 0.1.0-alpha.2 on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.108)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf8ce598c2e099fc0149cf7195be9e1fdcbc2f05a3d50236a829e283d5098294
[INFO] running `Command { std: "docker" "start" "-a" "cf8ce598c2e099fc0149cf7195be9e1fdcbc2f05a3d50236a829e283d5098294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf8ce598c2e099fc0149cf7195be9e1fdcbc2f05a3d50236a829e283d5098294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf8ce598c2e099fc0149cf7195be9e1fdcbc2f05a3d50236a829e283d5098294", kill_on_drop: false }`
[INFO] [stdout] cf8ce598c2e099fc0149cf7195be9e1fdcbc2f05a3d50236a829e283d5098294
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 430ce4017926703b5e73631dbab8818b558e092052a70c1a6fa220b1f73b953c
[INFO] running `Command { std: "docker" "start" "-a" "430ce4017926703b5e73631dbab8818b558e092052a70c1a6fa220b1f73b953c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.102
[INFO] [stderr]     Checking unicode-ident v1.0.20
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking aktrs-macros v0.1.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.59s
[INFO] running `Command { std: "docker" "inspect" "430ce4017926703b5e73631dbab8818b558e092052a70c1a6fa220b1f73b953c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "430ce4017926703b5e73631dbab8818b558e092052a70c1a6fa220b1f73b953c", kill_on_drop: false }`
[INFO] [stdout] 430ce4017926703b5e73631dbab8818b558e092052a70c1a6fa220b1f73b953c