[INFO] fetching crate seabird 0.2.0-alpha.1...
[INFO] checking seabird-0.2.0-alpha.1 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate seabird 0.2.0-alpha.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate seabird 0.2.0-alpha.1 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate seabird 0.2.0-alpha.1
[INFO] finished tweaking crates.io crate seabird 0.2.0-alpha.1
[INFO] tweaked toml for crates.io crate seabird 0.2.0-alpha.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fa4f327b3416167de644d9802cc5b5b83f3212eeabdd16e9e783ca015a3c3ca
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2fa4f327b3416167de644d9802cc5b5b83f3212eeabdd16e9e783ca015a3c3ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fa4f327b3416167de644d9802cc5b5b83f3212eeabdd16e9e783ca015a3c3ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fa4f327b3416167de644d9802cc5b5b83f3212eeabdd16e9e783ca015a3c3ca", kill_on_drop: false }`
[INFO] [stdout] 2fa4f327b3416167de644d9802cc5b5b83f3212eeabdd16e9e783ca015a3c3ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 87d1c8582c3d20e85fb72f19ff013d028d1c7a707b47dc08af9d760e065a5c6d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "87d1c8582c3d20e85fb72f19ff013d028d1c7a707b47dc08af9d760e065a5c6d", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]     Checking pin-project-lite v0.1.11
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]     Checking tower-layer v0.3.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking futures-task v0.3.12
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking futures-sink v0.3.12
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling ring v0.16.19
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking http v0.2.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tokio v0.2.24
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking rustls v0.18.1
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tower-make v0.3.0
[INFO] [stderr]     Checking tower-ready-cache v0.3.1
[INFO] [stderr]     Checking rustls-native-certs v0.4.0
[INFO] [stderr]     Checking tokio-rustls v0.14.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.4
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]     Checking async-stream v0.2.1
[INFO] [stderr]     Checking pin-project v1.0.4
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tower-discover v0.3.0
[INFO] [stderr]     Checking tower-load-shed v0.3.0
[INFO] [stderr]     Checking tower-util v0.3.1
[INFO] [stderr]     Checking tower-retry v0.3.0
[INFO] [stderr]     Checking tower-timeout v0.3.0
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking tower-buffer v0.3.0
[INFO] [stderr]     Checking tower-load v0.3.0
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking tower-limit v0.3.1
[INFO] [stderr]     Checking tower-balance v0.3.0
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]     Checking tower v0.3.1
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]    Compiling tonic-build v0.3.1
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]    Compiling seabird v0.2.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `seabird v0.2.0-alpha.1 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/seabird-08aa98d533843388/build-script-build` (exit code: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   error: 'rustfmt' is not installed for the toolchain '4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5'
[INFO] [stderr]   note: this is a custom toolchain, which cannot use `rustup component add`
[INFO] [stderr]   help: if you built this toolchain from source, and used `rustup toolchain link`, then you may be able to build the component with `x.py`
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "87d1c8582c3d20e85fb72f19ff013d028d1c7a707b47dc08af9d760e065a5c6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87d1c8582c3d20e85fb72f19ff013d028d1c7a707b47dc08af9d760e065a5c6d", kill_on_drop: false }`
[INFO] [stdout] 87d1c8582c3d20e85fb72f19ff013d028d1c7a707b47dc08af9d760e065a5c6d