[INFO] fetching crate b_trees 0.0.12...
[INFO] building b_trees-0.0.12 against try#9b5e8b16bd1c4acf4cf8e6880368314cf021a987+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate b_trees 0.0.12 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate b_trees 0.0.12 on toolchain 9b5e8b16bd1c4acf4cf8e6880368314cf021a987
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate b_trees 0.0.12
[INFO] finished tweaking crates.io crate b_trees 0.0.12
[INFO] tweaked toml for crates.io crate b_trees 0.0.12 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate b_trees 0.0.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "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
[ERROR] error running command: no output for 300 seconds
[INFO] building b_trees-0.0.12 against try#9b5e8b16bd1c4acf4cf8e6880368314cf021a987+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate b_trees 0.0.12 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate b_trees 0.0.12 on toolchain 9b5e8b16bd1c4acf4cf8e6880368314cf021a987
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate b_trees 0.0.12
[INFO] finished tweaking crates.io crate b_trees 0.0.12
[INFO] tweaked toml for crates.io crate b_trees 0.0.12 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate b_trees 0.0.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a844600d0f27ee08655991da5713aa7bd05b8508e8856a3e5345615b9a446a4
[INFO] running `Command { std: "docker" "start" "-a" "5a844600d0f27ee08655991da5713aa7bd05b8508e8856a3e5345615b9a446a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a844600d0f27ee08655991da5713aa7bd05b8508e8856a3e5345615b9a446a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a844600d0f27ee08655991da5713aa7bd05b8508e8856a3e5345615b9a446a4", kill_on_drop: false }`
[INFO] [stdout] 5a844600d0f27ee08655991da5713aa7bd05b8508e8856a3e5345615b9a446a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60ed93b91b04391fc846b722b6acde49c42d260dd939a05bb5cf189bf6f3e002
[INFO] running `Command { std: "docker" "start" "-a" "60ed93b91b04391fc846b722b6acde49c42d260dd939a05bb5cf189bf6f3e002", kill_on_drop: false }`
[INFO] [stderr]    Compiling b_trees v0.0.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "60ed93b91b04391fc846b722b6acde49c42d260dd939a05bb5cf189bf6f3e002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60ed93b91b04391fc846b722b6acde49c42d260dd939a05bb5cf189bf6f3e002", kill_on_drop: false }`
[INFO] [stdout] 60ed93b91b04391fc846b722b6acde49c42d260dd939a05bb5cf189bf6f3e002
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ade379d599f1c224bfb0f85241fb30c0df80274bd3ee434ad7540c30ecf824e5
[INFO] running `Command { std: "docker" "start" "-a" "ade379d599f1c224bfb0f85241fb30c0df80274bd3ee434ad7540c30ecf824e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling b_trees v0.0.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "ade379d599f1c224bfb0f85241fb30c0df80274bd3ee434ad7540c30ecf824e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ade379d599f1c224bfb0f85241fb30c0df80274bd3ee434ad7540c30ecf824e5", kill_on_drop: false }`
[INFO] [stdout] ade379d599f1c224bfb0f85241fb30c0df80274bd3ee434ad7540c30ecf824e5