[INFO] cloning repository https://github.com/rust-lang-nursery/rustfmt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-lang-nursery/rustfmt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2Frustfmt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2Frustfmt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 94f17f8dde15b883002e9d935be3a60919240a48
[INFO] testing rust-lang-nursery/rustfmt against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2Frustfmt" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-lang-nursery/rustfmt on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rust-lang-nursery/rustfmt
[INFO] removed path dependency rustfmt-config_proc_macro from git repo https://github.com/rust-lang-nursery/rustfmt
[INFO] finished tweaking git repo https://github.com/rust-lang-nursery/rustfmt
[INFO] tweaked toml for git repo https://github.com/rust-lang-nursery/rustfmt written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-lang-nursery/rustfmt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded semver v0.10.0
[INFO] [stderr]   Downloaded md-5 v0.9.1
[INFO] [stderr]   Downloaded measureme v9.0.0
[INFO] [stderr]   Downloaded psm v0.1.12
[INFO] [stderr]   Downloaded rustc-rayon-core v0.3.0
[INFO] [stderr]   Downloaded cargo_metadata v0.11.4
[INFO] [stderr]   Downloaded yansi-term v0.1.2
[INFO] [stderr]   Downloaded rustc-rayon v0.3.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_passes v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_attr v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v697.0.0
[INFO] [stderr]   Downloaded stacker v0.1.12
[INFO] [stderr]   Downloaded termize v0.1.1
[INFO] [stderr]   Downloaded annotate-snippets v0.8.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_expand v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v697.0.0
[INFO] [stderr]   Downloaded rustfmt-config_proc_macro v0.5.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v697.0.0
[INFO] [stderr]   Downloaded rustc-workspace-hack v1.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v697.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lint_defs v697.0.0
[INFO] [stderr]   Downloaded ignore v0.4.17
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2858d50ead0f5ef3a7747363f9e3f70654b595a55a118d85d96152d0b252773
[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" "e2858d50ead0f5ef3a7747363f9e3f70654b595a55a118d85d96152d0b252773", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2858d50ead0f5ef3a7747363f9e3f70654b595a55a118d85d96152d0b252773", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2858d50ead0f5ef3a7747363f9e3f70654b595a55a118d85d96152d0b252773", kill_on_drop: false }`
[INFO] [stdout] e2858d50ead0f5ef3a7747363f9e3f70654b595a55a118d85d96152d0b252773
[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=warn" "-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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0ebed6bafcb30d1d0e64d7e288f1e2df61dc6fea00ace73a6200bbf1826faf5
[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" "b0ebed6bafcb30d1d0e64d7e288f1e2df61dc6fea00ace73a6200bbf1826faf5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling smallvec v1.6.0
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.1
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling rustc-ap-rustc_graphviz v697.0.0
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.6.0/src/lib.rs:76:37
[INFO] [stdout]    |
[INFO] [stdout] 76 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling yansi-term v0.1.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_graphviz-697.0.0/src/lib.rs:278:1
[INFO] [stdout]     |
[INFO] [stdout] 278 | #![feature(nll)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling rustc-ap-rustc_fs_util v697.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-ap-rustc_graphviz`
[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] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b0ebed6bafcb30d1d0e64d7e288f1e2df61dc6fea00ace73a6200bbf1826faf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0ebed6bafcb30d1d0e64d7e288f1e2df61dc6fea00ace73a6200bbf1826faf5", kill_on_drop: false }`
[INFO] [stdout] b0ebed6bafcb30d1d0e64d7e288f1e2df61dc6fea00ace73a6200bbf1826faf5