[INFO] cloning repository https://github.com/RealTimeChris/DiscordCoreAPI-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RealTimeChris/DiscordCoreAPI-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRealTimeChris%2FDiscordCoreAPI-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRealTimeChris%2FDiscordCoreAPI-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d17b0e2310ce39ff6a809b7690b952370ae28705
[INFO] testing RealTimeChris/DiscordCoreAPI-Rust against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRealTimeChris%2FDiscordCoreAPI-Rust" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RealTimeChris/DiscordCoreAPI-Rust on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RealTimeChris/DiscordCoreAPI-Rust
[INFO] finished tweaking git repo https://github.com/RealTimeChris/DiscordCoreAPI-Rust
[INFO] tweaked toml for git repo https://github.com/RealTimeChris/DiscordCoreAPI-Rust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/RealTimeChris/DiscordCoreAPI-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.overflow-checks
[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 fallible v0.1.3
[INFO] [stderr]   Downloaded rel v0.2.0
[INFO] [stderr]   Downloaded abort v0.1.3
[INFO] [stderr]   Downloaded hash-table v0.2.5
[INFO] [stderr]   Downloaded ptr v0.2.3
[INFO] [stderr]   Downloaded loca v0.7.4
[INFO] [stderr]   Downloaded containers v0.9.13
[INFO] [stderr]   Downloaded json v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61b6ff4e19011c631038442b201429f87ac0f23279985586c14ae5e16573a178
[INFO] running `Command { std: "docker" "start" "-a" "61b6ff4e19011c631038442b201429f87ac0f23279985586c14ae5e16573a178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61b6ff4e19011c631038442b201429f87ac0f23279985586c14ae5e16573a178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61b6ff4e19011c631038442b201429f87ac0f23279985586c14ae5e16573a178", kill_on_drop: false }`
[INFO] [stdout] 61b6ff4e19011c631038442b201429f87ac0f23279985586c14ae5e16573a178
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a58cd53d1de68070e6edcff33bb6e3c22c7245d0c31b6880674e05ff7d99e112
[INFO] running `Command { std: "docker" "start" "-a" "a58cd53d1de68070e6edcff33bb6e3c22c7245d0c31b6880674e05ff7d99e112", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.overflow-checks
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling ptr v0.2.3
[INFO] [stderr]    Compiling hash-table v0.2.5
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling containers v0.9.13
[INFO] [stderr]    Compiling heap v0.1.0
[INFO] [stderr]    Compiling rel v0.2.0
[INFO] [stderr]    Compiling abort v0.1.3
[INFO] [stderr]    Compiling json v0.2.1
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling fallible v0.1.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/hash-table-0.2.5/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(maybe_uninit_ref)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/hash-table-0.2.5/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(non_ascii_idents)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `non_ascii_idents` has been stable since 1.53.0 and no longer requires an attribute to enable
[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 `hash-table` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ptr-0.2.3/src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(coerce_unsized)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ptr-0.2.3/src/lib.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![feature(unsize)]
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "a58cd53d1de68070e6edcff33bb6e3c22c7245d0c31b6880674e05ff7d99e112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a58cd53d1de68070e6edcff33bb6e3c22c7245d0c31b6880674e05ff7d99e112", kill_on_drop: false }`
[INFO] [stdout] a58cd53d1de68070e6edcff33bb6e3c22c7245d0c31b6880674e05ff7d99e112