[INFO] cloning repository https://github.com/hegza/serpent-cli
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hegza/serpent-cli" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegza%2Fserpent-cli", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegza%2Fserpent-cli'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 83103be6a1a6e47a800a631cbf59046e862d3f57
[INFO] checking hegza/serpent-cli against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegza%2Fserpent-cli" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hegza/serpent-cli on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hegza/serpent-cli
[INFO] finished tweaking git repo https://github.com/hegza/serpent-cli
[INFO] tweaked toml for git repo https://github.com/hegza/serpent-cli written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/hegza/serpent-cli already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f6dfc6748dd6c480a8f1f1c480efe11953cb9e80f8d2e1a85c2bc8ad0022832
[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" "4f6dfc6748dd6c480a8f1f1c480efe11953cb9e80f8d2e1a85c2bc8ad0022832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f6dfc6748dd6c480a8f1f1c480efe11953cb9e80f8d2e1a85c2bc8ad0022832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f6dfc6748dd6c480a8f1f1c480efe11953cb9e80f8d2e1a85c2bc8ad0022832", kill_on_drop: false }`
[INFO] [stdout] 4f6dfc6748dd6c480a8f1f1c480efe11953cb9e80f8d2e1a85c2bc8ad0022832
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3124086d5b2a2606d47a5d75d94a960af7366b4b65b299218b2e127b71506a52
[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" "3124086d5b2a2606d47a5d75d94a960af7366b4b65b299218b2e127b71506a52", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]     Checking pin-project-lite v0.1.10
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking rustc-ap-rustc_graphviz v673.0.0
[INFO] [stderr]    Compiling regex-syntax v0.6.20
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking ucd-util v0.1.8
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling lalrpop-util v0.19.1
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking object v0.21.1
[INFO] [stderr]     Checking rustc-demangle v0.1.17
[INFO] [stderr]    Compiling rustfmt v0.10.0
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]     Checking unicode_names2 v0.4.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking fs-err v2.5.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking instant v0.1.7
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v673.0.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking unic-emoji-char v0.9.0
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[INFO] [stderr]     Checking ena v0.14.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking aho-corasick v0.7.14
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]    Compiling extprim v1.7.1
[INFO] [stderr]     Checking strings v0.1.1
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling psm v0.1.11
[INFO] [stderr]    Compiling stacker v0.1.12
[INFO] [stderr]     Checking rustc-ap-rustc_serialize v673.0.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking jobserver v0.1.21
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking backtrace v0.3.53
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]     Checking measureme v0.7.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rustc-ap-rustc_index v673.0.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking color-backtrace v0.3.0
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking rustc-rayon v0.3.0
[INFO] [stderr]     Checking pretty_env_logger v0.3.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking toml_edit v0.1.5
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling rustc-ap-rustc_macros v673.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]    Compiling ctor v0.1.16
[INFO] [stderr]    Compiling derive_deref v1.1.1
[INFO] [stderr]     Checking cargo-toml-builder v0.3.0
[INFO] [stderr]     Checking thiserror v1.0.21
[INFO] [stderr]     Checking flexi_logger v0.16.1
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v673.0.0
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_data_structures-673.0.0/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(optin_builtin_traits)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_data_structures-673.0.0/sync.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         pub auto trait Send {}
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]    = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_data_structures-673.0.0/sync.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         pub auto trait Sync {}
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]    = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-ap-rustc_data_structures`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3124086d5b2a2606d47a5d75d94a960af7366b4b65b299218b2e127b71506a52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3124086d5b2a2606d47a5d75d94a960af7366b4b65b299218b2e127b71506a52", kill_on_drop: false }`
[INFO] [stdout] 3124086d5b2a2606d47a5d75d94a960af7366b4b65b299218b2e127b71506a52