[INFO] fetching crate hedera 0.4.1...
[INFO] checking hedera-0.4.1 against beta for pr-78714
[INFO] extracting crate hedera 0.4.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate hedera 0.4.1 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 hedera 0.4.1
[INFO] finished tweaking crates.io crate hedera 0.4.1
[INFO] tweaked toml for crates.io crate hedera 0.4.1 written to /workspace/builds/worker-5/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] 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-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/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] 3bc626b0d2c9590c59052eff3b8bb4277de0cdd2081400ce48b42d551600b953
[INFO] running `Command { std: "docker" "start" "-a" "3bc626b0d2c9590c59052eff3b8bb4277de0cdd2081400ce48b42d551600b953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bc626b0d2c9590c59052eff3b8bb4277de0cdd2081400ce48b42d551600b953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bc626b0d2c9590c59052eff3b8bb4277de0cdd2081400ce48b42d551600b953", kill_on_drop: false }`
[INFO] [stdout] 3bc626b0d2c9590c59052eff3b8bb4277de0cdd2081400ce48b42d551600b953
[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=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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e026fac32c5f82ab3b78a40abcd83d1834d090fee155e09429ae840fde05aac8
[INFO] running `Command { std: "docker" "start" "-a" "e026fac32c5f82ab3b78a40abcd83d1834d090fee155e09429ae840fde05aac8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking futures v0.1.30
[INFO] [stderr]    Compiling protobuf v2.8.2
[INFO] [stderr]    Compiling httpbis v0.7.0
[INFO] [stderr]     Checking subtle v2.3.0
[INFO] [stderr]     Checking query_interface v0.3.5
[INFO] [stderr]     Checking tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking tls-api v0.1.22
[INFO] [stderr]    Compiling protoc v2.8.2
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking hashbrown v0.1.8
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking unix_socket v0.5.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]     Checking num-iter v0.1.42
[INFO] [stderr]     Checking bytes v0.4.12
[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] [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" "e026fac32c5f82ab3b78a40abcd83d1834d090fee155e09429ae840fde05aac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e026fac32c5f82ab3b78a40abcd83d1834d090fee155e09429ae840fde05aac8", kill_on_drop: false }`
[INFO] [stdout] e026fac32c5f82ab3b78a40abcd83d1834d090fee155e09429ae840fde05aac8