[INFO] fetching crate snocat 0.1.2...
[INFO] checking snocat-0.1.2 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate snocat 0.1.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate snocat 0.1.2 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate snocat 0.1.2
[INFO] finished tweaking crates.io crate snocat 0.1.2
[INFO] tweaked toml for crates.io crate snocat 0.1.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a71b5c1315ad7a26163e80b73e2341e55652108fbc20e8802ae859e2739cf98
[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" "5a71b5c1315ad7a26163e80b73e2341e55652108fbc20e8802ae859e2739cf98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a71b5c1315ad7a26163e80b73e2341e55652108fbc20e8802ae859e2739cf98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a71b5c1315ad7a26163e80b73e2341e55652108fbc20e8802ae859e2739cf98", kill_on_drop: false }`
[INFO] [stdout] 5a71b5c1315ad7a26163e80b73e2341e55652108fbc20e8802ae859e2739cf98
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10e2820ef7bbe8a8fcc86b88747bade5cd1f92f2a1c111121d7edacbb8b0e3b6
[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" "10e2820ef7bbe8a8fcc86b88747bade5cd1f92f2a1c111121d7edacbb8b0e3b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]     Checking vec-arena v1.1.0
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking triggered v0.1.1
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking sharded-slab v0.1.1
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling which v4.1.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling prost-build v0.7.0
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking sct v0.6.1
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking ct-logs v0.6.0
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling prost-derive v0.7.0
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling async-stream-impl v0.3.0
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking async-stream v0.3.0
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]     Checking rustls v0.17.0
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking ffi-support v0.4.2
[INFO] [stderr]     Checking async-io v1.4.0
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking tracing v0.1.25
[INFO] [stderr]    Compiling prost v0.7.0
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking prost-types v0.7.0
[INFO] [stderr]     Checking rustls-native-certs v0.3.0
[INFO] [stderr]     Checking quinn-proto v0.6.1
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking futures v0.3.14
[INFO] [stderr]     Checking gen-z v0.1.0
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]    Compiling tonic-build v0.4.2
[INFO] [stderr]     Checking tokio-util v0.6.6
[INFO] [stderr]     Checking tokio-stream v0.1.5
[INFO] [stderr]     Checking async-global-executor v1.4.3
[INFO] [stderr]     Checking async-std v1.7.0
[INFO] [stderr]     Checking h2 v0.3.2
[INFO] [stderr]     Checking tower v0.4.6
[INFO] [stderr]    Compiling snocat v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking quinn v0.6.2
[INFO] [stderr] error: failed to run custom build command for `snocat v0.1.2 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/snocat-9efa9cddbd760c72/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   error: 'rustfmt' is not installed for the toolchain '4fa76a4a7742bb9c1febe33019f5a9e7e4839a65'
[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" "10e2820ef7bbe8a8fcc86b88747bade5cd1f92f2a1c111121d7edacbb8b0e3b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10e2820ef7bbe8a8fcc86b88747bade5cd1f92f2a1c111121d7edacbb8b0e3b6", kill_on_drop: false }`
[INFO] [stdout] 10e2820ef7bbe8a8fcc86b88747bade5cd1f92f2a1c111121d7edacbb8b0e3b6