[INFO] fetching crate kctf-pow 1.2.0...
[INFO] checking kctf-pow-1.2.0 against master#accc516128b21e960b1a7af45393e9acdd184890 for pr-122501
[INFO] extracting crate kctf-pow 1.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate kctf-pow 1.2.0 on toolchain accc516128b21e960b1a7af45393e9acdd184890
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+accc516128b21e960b1a7af45393e9acdd184890" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kctf-pow 1.2.0
[INFO] finished tweaking crates.io crate kctf-pow 1.2.0
[INFO] tweaked toml for crates.io crate kctf-pow 1.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate kctf-pow 1.2.0 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" "+accc516128b21e960b1a7af45393e9acdd184890" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rug v1.12.0
[INFO] [stderr]   Downloaded az v1.1.1
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.4.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+accc516128b21e960b1a7af45393e9acdd184890" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e84d094b5d7e371580fe619b52182989f7bd8b1d79a212d9ba557900570d255
[INFO] running `Command { std: "docker" "start" "-a" "5e84d094b5d7e371580fe619b52182989f7bd8b1d79a212d9ba557900570d255", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e84d094b5d7e371580fe619b52182989f7bd8b1d79a212d9ba557900570d255", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e84d094b5d7e371580fe619b52182989f7bd8b1d79a212d9ba557900570d255", kill_on_drop: false }`
[INFO] [stdout] 5e84d094b5d7e371580fe619b52182989f7bd8b1d79a212d9ba557900570d255
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+accc516128b21e960b1a7af45393e9acdd184890" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c878bc4bc4ef528f483d7103012c6a091174b27a7360c47ff311c02b21459df8
[INFO] running `Command { std: "docker" "start" "-a" "c878bc4bc4ef528f483d7103012c6a091174b27a7360c47ff311c02b21459df8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.5
[INFO] [stderr]    Compiling az v1.1.1
[INFO] [stderr]    Compiling rug v1.12.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking kctf-pow v1.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 28s
[INFO] running `Command { std: "docker" "inspect" "c878bc4bc4ef528f483d7103012c6a091174b27a7360c47ff311c02b21459df8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c878bc4bc4ef528f483d7103012c6a091174b27a7360c47ff311c02b21459df8", kill_on_drop: false }`
[INFO] [stdout] c878bc4bc4ef528f483d7103012c6a091174b27a7360c47ff311c02b21459df8
[INFO] checking kctf-pow-1.2.0 against try#32f93a5733992b29f321831b7e26c1f7d7205013 for pr-122501
[INFO] extracting crate kctf-pow 1.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate kctf-pow 1.2.0 on toolchain 32f93a5733992b29f321831b7e26c1f7d7205013
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+32f93a5733992b29f321831b7e26c1f7d7205013" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kctf-pow 1.2.0
[INFO] finished tweaking crates.io crate kctf-pow 1.2.0
[INFO] tweaked toml for crates.io crate kctf-pow 1.2.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate kctf-pow 1.2.0 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" "+32f93a5733992b29f321831b7e26c1f7d7205013" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+32f93a5733992b29f321831b7e26c1f7d7205013" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c625150095a26c19d967d2be1b934622ca3179e020130000c9bbc4234111c46
[INFO] running `Command { std: "docker" "start" "-a" "4c625150095a26c19d967d2be1b934622ca3179e020130000c9bbc4234111c46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c625150095a26c19d967d2be1b934622ca3179e020130000c9bbc4234111c46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c625150095a26c19d967d2be1b934622ca3179e020130000c9bbc4234111c46", kill_on_drop: false }`
[INFO] [stdout] 4c625150095a26c19d967d2be1b934622ca3179e020130000c9bbc4234111c46
[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" "+32f93a5733992b29f321831b7e26c1f7d7205013" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bbd1d329e98cd5f3bae6c0c93a62901b859778deca9016f5f5df059a7ce5ca1
[INFO] running `Command { std: "docker" "start" "-a" "6bbd1d329e98cd5f3bae6c0c93a62901b859778deca9016f5f5df059a7ce5ca1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.5
[INFO] [stderr]    Compiling az v1.1.1
[INFO] [stderr]    Compiling rug v1.12.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "6bbd1d329e98cd5f3bae6c0c93a62901b859778deca9016f5f5df059a7ce5ca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bbd1d329e98cd5f3bae6c0c93a62901b859778deca9016f5f5df059a7ce5ca1", kill_on_drop: false }`
[INFO] [stdout] 6bbd1d329e98cd5f3bae6c0c93a62901b859778deca9016f5f5df059a7ce5ca1