[INFO] cloning repository https://github.com/racer-rust/racer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/racer-rust/racer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fracer-rust%2Fracer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fracer-rust%2Fracer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 48ed93d31dc0beea6fc7185e8496faa7fa9ded5c
[INFO] testing racer-rust/racer against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fracer-rust%2Fracer" "/workspace/builds/worker-85/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-85/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/racer-rust/racer on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-85/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/racer-rust/racer
[INFO] finished tweaking git repo https://github.com/racer-rust/racer
[INFO] tweaked toml for git repo https://github.com/racer-rust/racer written to /workspace/builds/worker-85/source/Cargo.toml
[INFO] crate git repo https://github.com/racer-rust/racer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded stacker v0.1.12
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v722.0.0
[INFO] [stderr]   Downloaded perf-event-open-sys v1.0.1
[INFO] [stderr]   Downloaded rls-span v0.5.2
[INFO] [stderr]   Downloaded humantime v2.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v722.0.0
[INFO] [stderr]   Downloaded rustc-rayon-core v0.3.1
[INFO] [stderr]   Downloaded memmap2 v0.2.2
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lint_defs v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v722.0.0
[INFO] [stderr]   Downloaded annotate-snippets v0.8.0
[INFO] [stderr]   Downloaded termize v0.1.1
[INFO] [stderr]   Downloaded measureme v9.1.0
[INFO] [stderr]   Downloaded rustc-rayon v0.3.1
[INFO] [stderr]   Downloaded psm v0.1.8
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v722.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v722.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e5ed756d9c47f96d77dc30a819b197df236926cbe26934efa3faa80d7911486
[INFO] running `Command { std: "docker" "start" "-a" "1e5ed756d9c47f96d77dc30a819b197df236926cbe26934efa3faa80d7911486", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e5ed756d9c47f96d77dc30a819b197df236926cbe26934efa3faa80d7911486", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e5ed756d9c47f96d77dc30a819b197df236926cbe26934efa3faa80d7911486", kill_on_drop: false }`
[INFO] [stdout] 1e5ed756d9c47f96d77dc30a819b197df236926cbe26934efa3faa80d7911486
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3ffba2fce66a48a41ad727b7a681e018ce1b86084128a5e94d2606093633892
[INFO] running `Command { std: "docker" "start" "-a" "f3ffba2fce66a48a41ad727b7a681e018ce1b86084128a5e94d2606093633892", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling cc v1.0.53
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling arrayvec v0.7.0
[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-1.6.1/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 opaque-debug v0.3.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling rustc-ap-rustc_graphviz v722.0.0
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling annotate-snippets v0.8.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling rustc-ap-rustc_fs_util v722.0.0
[INFO] [stderr]    Compiling humantime v2.0.0
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling indexmap v1.5.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling instant v0.1.7
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling tracing-core v0.1.15
[INFO] [stderr]    Compiling rustc-ap-rustc_lexer v722.0.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr] error: could not compile `smallvec` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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-722.0.0/src/lib.rs:278:1
[INFO] [stdout]     |
[INFO] [stdout] 278 | #![feature(nll)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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" "f3ffba2fce66a48a41ad727b7a681e018ce1b86084128a5e94d2606093633892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3ffba2fce66a48a41ad727b7a681e018ce1b86084128a5e94d2606093633892", kill_on_drop: false }`
[INFO] [stdout] f3ffba2fce66a48a41ad727b7a681e018ce1b86084128a5e94d2606093633892