[INFO] fetching crate cargo-modules 0.4.10...
[INFO] testing cargo-modules-0.4.10 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate cargo-modules 0.4.10 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate cargo-modules 0.4.10 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 crates.io crate cargo-modules 0.4.10
[INFO] finished tweaking crates.io crate cargo-modules 0.4.10
[INFO] tweaked toml for crates.io crate cargo-modules 0.4.10 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate cargo-modules 0.4.10 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]  Downloading crates ...
[INFO] [stderr]   Downloaded stacker v0.1.12
[INFO] [stderr]   Downloaded psm v0.1.12
[INFO] [stderr]   Downloaded measureme v9.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lint_defs v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v693.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v693.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9185df85e77f47c80e20bccb6e84aa0894fb83c64b63d94a30a0a95b614283f2
[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" "9185df85e77f47c80e20bccb6e84aa0894fb83c64b63d94a30a0a95b614283f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9185df85e77f47c80e20bccb6e84aa0894fb83c64b63d94a30a0a95b614283f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9185df85e77f47c80e20bccb6e84aa0894fb83c64b63d94a30a0a95b614283f2", kill_on_drop: false }`
[INFO] [stdout] 9185df85e77f47c80e20bccb6e84aa0894fb83c64b63d94a30a0a95b614283f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ebcf58f9b05f41b08e27ebfc89ef918174987a482e293b84da2b85fe1e679b39
[INFO] running `Command { std: "docker" "start" "-a" "ebcf58f9b05f41b08e27ebfc89ef918174987a482e293b84da2b85fe1e679b39", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling smallvec v1.5.1
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.0
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling rustc-ap-rustc_graphviz v693.0.0
[INFO] [stderr]    Compiling annotate-snippets v0.8.0
[INFO] [stderr]    Compiling rustc-ap-rustc_fs_util v693.0.0
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling psm v0.1.12
[INFO] [stderr]    Compiling stacker v0.1.12
[INFO] [stderr]    Compiling lock_api v0.4.2
[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/smallvec-1.5.1/src/lib.rs:74:32
[INFO] [stdout]    |
[INFO] [stdout] 74 | #![cfg_attr(feature = "union", feature(untagged_unions))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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-1.5.1/src/lib.rs:77:37
[INFO] [stdout]    |
[INFO] [stdout] 77 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rustc-ap-rustc_lexer v693.0.0
[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/lock_api-0.4.2/src/lib.rs:91:34
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![cfg_attr(feature = "nightly", feature(const_fn))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getopts v0.2.21
[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-693.0.0/src/lib.rs:278:1
[INFO] [stdout]     |
[INFO] [stdout] 278 | #![feature(nll)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec`
[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] [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" "ebcf58f9b05f41b08e27ebfc89ef918174987a482e293b84da2b85fe1e679b39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebcf58f9b05f41b08e27ebfc89ef918174987a482e293b84da2b85fe1e679b39", kill_on_drop: false }`
[INFO] [stdout] ebcf58f9b05f41b08e27ebfc89ef918174987a482e293b84da2b85fe1e679b39