[INFO] fetching crate cpclib-basic 0.4.3-alpha...
[INFO] checking cpclib-basic-0.4.3-alpha against beta for pr-78714
[INFO] extracting crate cpclib-basic 0.4.3-alpha into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate cpclib-basic 0.4.3-alpha on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cpclib-basic 0.4.3-alpha
[INFO] finished tweaking crates.io crate cpclib-basic 0.4.3-alpha
[INFO] tweaked toml for crates.io crate cpclib-basic 0.4.3-alpha written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate cpclib-basic 0.4.3-alpha already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", 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] a37e6d264b97abd33b6fa253ce222fe850020b30dd3d3dbf822eb73d6f741151
[INFO] running `Command { std: "docker" "start" "-a" "a37e6d264b97abd33b6fa253ce222fe850020b30dd3d3dbf822eb73d6f741151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a37e6d264b97abd33b6fa253ce222fe850020b30dd3d3dbf822eb73d6f741151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a37e6d264b97abd33b6fa253ce222fe850020b30dd3d3dbf822eb73d6f741151", kill_on_drop: false }`
[INFO] [stdout] a37e6d264b97abd33b6fa253ce222fe850020b30dd3d3dbf822eb73d6f741151
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6963d299adb65fb042d24d6fbd41ea3430faa869f50a18da6cfc2bb7d4b226bb
[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" "6963d299adb65fb042d24d6fbd41ea3430faa869f50a18da6cfc2bb7d4b226bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.46
[INFO] [stderr]    Compiling tinyvec v0.3.4
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking object v0.21.1
[INFO] [stderr]     Checking bitsets v0.1.1
[INFO] [stderr]     Checking custom_error v1.8.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]     Checking lexical-core v0.7.4
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]     Checking num-complex v0.3.0
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]     Checking nom v5.1.2
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]     Checking backtrace v0.3.53
[INFO] [stderr]     Checking num v0.3.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling remain v0.2.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling delegate v0.4.3
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling cargo-lock v4.0.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]    Compiling built v0.4.3
[INFO] [stderr]     Checking num_enum v0.5.1
[INFO] [stderr]    Compiling cpclib-sna v0.4.3-alpha
[INFO] [stderr]    Compiling cpclib-tokens v0.4.3-alpha
[INFO] [stderr]    Compiling cpclib-disc v0.4.3-alpha
[INFO] [stderr]    Compiling cpclib-basic v0.4.3-alpha (/opt/rustwide/workdir)
[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/cpclib-tokens-0.4.3-alpha/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(stmt_expr_attributes)]
[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/cpclib-tokens-0.4.3-alpha/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_hygiene)]
[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 `cpclib-tokens`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6963d299adb65fb042d24d6fbd41ea3430faa869f50a18da6cfc2bb7d4b226bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6963d299adb65fb042d24d6fbd41ea3430faa869f50a18da6cfc2bb7d4b226bb", kill_on_drop: false }`
[INFO] [stdout] 6963d299adb65fb042d24d6fbd41ea3430faa869f50a18da6cfc2bb7d4b226bb