[INFO] fetching crate zei 0.0.10...
[INFO] checking zei-0.0.10 against beta for pr-78714
[INFO] extracting crate zei 0.0.10 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate zei 0.0.10 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 zei 0.0.10
[INFO] finished tweaking crates.io crate zei 0.0.10
[INFO] tweaked toml for crates.io crate zei 0.0.10 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/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] fd644fea43f1fe09a86566d7af508ff14b7e0b1dcd580c40cb7ee216dc117ef9
[INFO] running `Command { std: "docker" "start" "-a" "fd644fea43f1fe09a86566d7af508ff14b7e0b1dcd580c40cb7ee216dc117ef9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd644fea43f1fe09a86566d7af508ff14b7e0b1dcd580c40cb7ee216dc117ef9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd644fea43f1fe09a86566d7af508ff14b7e0b1dcd580c40cb7ee216dc117ef9", kill_on_drop: false }`
[INFO] [stdout] fd644fea43f1fe09a86566d7af508ff14b7e0b1dcd580c40cb7ee216dc117ef9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70c11321f874ca093f2d0b4b5f8e9f90b2817e6b7e38e9460cd25c06f336abba
[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" "70c11321f874ca093f2d0b4b5f8e9f90b2817e6b7e38e9460cd25c06f336abba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking subtle v2.3.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling zeroize_derive v1.0.1
[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/subtle-2.3.0/src/lib.rs:12:34
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "nightly", feature(external_doc))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion-plot v0.3.1
[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 `subtle`
[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" "70c11321f874ca093f2d0b4b5f8e9f90b2817e6b7e38e9460cd25c06f336abba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70c11321f874ca093f2d0b4b5f8e9f90b2817e6b7e38e9460cd25c06f336abba", kill_on_drop: false }`
[INFO] [stdout] 70c11321f874ca093f2d0b4b5f8e9f90b2817e6b7e38e9460cd25c06f336abba