[INFO] fetching crate mgm 0.5.0-pre.1...
[INFO] checking mgm-0.5.0-pre.1 against master#96df4943409564a187894018f15f795426dc2e1f for pr-118968
[INFO] extracting crate mgm 0.5.0-pre.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate mgm 0.5.0-pre.1 on toolchain 96df4943409564a187894018f15f795426dc2e1f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96df4943409564a187894018f15f795426dc2e1f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mgm 0.5.0-pre.1
[INFO] finished tweaking crates.io crate mgm 0.5.0-pre.1
[INFO] tweaked toml for crates.io crate mgm 0.5.0-pre.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96df4943409564a187894018f15f795426dc2e1f" "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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96df4943409564a187894018f15f795426dc2e1f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking mgm-0.5.0-pre.1 against try#7e4f74fb8736fea8f455bb6e094122965ae8f4cd for pr-118968
[INFO] extracting crate mgm 0.5.0-pre.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate mgm 0.5.0-pre.1 on toolchain 7e4f74fb8736fea8f455bb6e094122965ae8f4cd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mgm 0.5.0-pre.1
[INFO] finished tweaking crates.io crate mgm 0.5.0-pre.1
[INFO] tweaked toml for crates.io crate mgm 0.5.0-pre.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded aead v0.5.0-pre.2
[INFO] [stderr]   Downloaded hex-literal-impl v0.2.3
[INFO] [stderr]   Downloaded blobby v0.3.1
[INFO] [stderr]   Downloaded hex-literal v0.2.2
[INFO] [stderr]   Downloaded magma v0.7.0
[INFO] [stderr]   Downloaded kuznyechik v0.7.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af193a6d1f6fa9f171a83aac9502c868a32ca94e87541a1681653bf0e1780b52
[INFO] running `Command { std: "docker" "start" "-a" "af193a6d1f6fa9f171a83aac9502c868a32ca94e87541a1681653bf0e1780b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af193a6d1f6fa9f171a83aac9502c868a32ca94e87541a1681653bf0e1780b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af193a6d1f6fa9f171a83aac9502c868a32ca94e87541a1681653bf0e1780b52", kill_on_drop: false }`
[INFO] [stdout] af193a6d1f6fa9f171a83aac9502c868a32ca94e87541a1681653bf0e1780b52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4b4b2ee3ceee1b88a1e6c38d99edfa783c558110fde0671d8ac124e51ba36ad
[INFO] running `Command { std: "docker" "start" "-a" "b4b4b2ee3ceee1b88a1e6c38d99edfa783c558110fde0671d8ac124e51ba36ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking blobby v0.3.1
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking aead v0.5.0-pre.2
[INFO] [stderr]     Checking magma v0.7.0
[INFO] [stderr]     Checking kuznyechik v0.7.2
[INFO] [stderr]     Checking mgm v0.5.0-pre.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling hex-literal-impl v0.2.3
[INFO] [stderr]     Checking hex-literal v0.2.2
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "b4b4b2ee3ceee1b88a1e6c38d99edfa783c558110fde0671d8ac124e51ba36ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4b4b2ee3ceee1b88a1e6c38d99edfa783c558110fde0671d8ac124e51ba36ad", kill_on_drop: false }`
[INFO] [stdout] b4b4b2ee3ceee1b88a1e6c38d99edfa783c558110fde0671d8ac124e51ba36ad