[INFO] cloning repository https://github.com/zeta-lang/zeta
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zeta-lang/zeta" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeta-lang%2Fzeta", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeta-lang%2Fzeta'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7cddcee3eac65d36153550148e8b5b55bc858ef
[INFO] checking zeta-lang/zeta against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeta-lang%2Fzeta" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zeta-lang/zeta on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-13/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-13/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/zeta-lang/zeta
[INFO] finished tweaking git repo https://github.com/zeta-lang/zeta
[INFO] tweaked toml for git repo https://github.com/zeta-lang/zeta written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "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 peg-runtime v0.7.0
[INFO] [stderr]   Downloaded peg-macros v0.7.0
[INFO] [stderr]   Downloaded peg v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86bea148dac7112b846032d1b71a53f6cd61b561f7c98c70a40a3168c701de28
[INFO] running `Command { std: "docker" "start" "-a" "86bea148dac7112b846032d1b71a53f6cd61b561f7c98c70a40a3168c701de28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86bea148dac7112b846032d1b71a53f6cd61b561f7c98c70a40a3168c701de28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86bea148dac7112b846032d1b71a53f6cd61b561f7c98c70a40a3168c701de28", kill_on_drop: false }`
[INFO] [stdout] 86bea148dac7112b846032d1b71a53f6cd61b561f7c98c70a40a3168c701de28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1c74a6c3ae36e86ed1ec55e4b4d95a981fe17693675889576070bda64fdb577
[INFO] running `Command { std: "docker" "start" "-a" "e1c74a6c3ae36e86ed1ec55e4b4d95a981fe17693675889576070bda64fdb577", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]     Checking zeta_log v0.2.0 (/opt/rustwide/workdir/crates/log)
[INFO] [stderr]    Compiling peg-runtime v0.7.0
[INFO] [stderr]     Checking zeta_macros v0.2.0 (/opt/rustwide/workdir/crates/macros)
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking zeta_common v0.2.0 (/opt/rustwide/workdir/crates/common)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> crates/common/src/lib.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / #![feature(
[INFO] [stdout] 3  | |     specialization,
[INFO] [stdout] 4  | |     const_panic,
[INFO] [stdout] 5  | |     maybe_uninit_ref,
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     trait_alias
[INFO] [stdout] 13 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> crates/common/src/lib.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / #![feature(
[INFO] [stdout] 3  | |     specialization,
[INFO] [stdout] 4  | |     const_panic,
[INFO] [stdout] 5  | |     maybe_uninit_ref,
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     trait_alias
[INFO] [stdout] 13 | | )]
[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 `zeta_common` due to 2 previous errors
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e1c74a6c3ae36e86ed1ec55e4b4d95a981fe17693675889576070bda64fdb577", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1c74a6c3ae36e86ed1ec55e4b4d95a981fe17693675889576070bda64fdb577", kill_on_drop: false }`
[INFO] [stdout] e1c74a6c3ae36e86ed1ec55e4b4d95a981fe17693675889576070bda64fdb577
