[INFO] cloning repository https://github.com/jnferner/uzh-biomed-bot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jnferner/uzh-biomed-bot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjnferner%2Fuzh-biomed-bot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjnferner%2Fuzh-biomed-bot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 144cbbde90f7c054a4407564649ea650c143f46b
[INFO] testing jnferner/uzh-biomed-bot against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjnferner%2Fuzh-biomed-bot" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jnferner/uzh-biomed-bot on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jnferner/uzh-biomed-bot
[INFO] finished tweaking git repo https://github.com/jnferner/uzh-biomed-bot
[INFO] tweaked toml for git repo https://github.com/jnferner/uzh-biomed-bot written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jnferner/uzh-biomed-bot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60407e76df310a628afdb563632c7f34482fa0125fcd5f8417162bf33355285b
[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" "60407e76df310a628afdb563632c7f34482fa0125fcd5f8417162bf33355285b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60407e76df310a628afdb563632c7f34482fa0125fcd5f8417162bf33355285b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60407e76df310a628afdb563632c7f34482fa0125fcd5f8417162bf33355285b", kill_on_drop: false }`
[INFO] [stdout] 60407e76df310a628afdb563632c7f34482fa0125fcd5f8417162bf33355285b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1252dddc1bcadbd43ac9d2058d19c829ee73b47f82280bf17901611c40d5b604
[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" "1252dddc1bcadbd43ac9d2058d19c829ee73b47f82280bf17901611c40d5b604", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling once_cell v1.4.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling pin-project-lite v0.1.7
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling hashbrown v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling dotenv v0.15.0
[INFO] [stderr]    Compiling tracing-core v0.1.16
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling http v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling net2 v0.2.35
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling socket2 v0.3.15
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling chrono v0.4.15
[INFO] [stderr]    Compiling typed-headers v0.2.0
[INFO] [stderr]    Compiling clokwerk v0.3.3
[INFO] [stderr]    Compiling pmutil v0.5.3
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling is-macro v0.1.8
[INFO] [stderr]    Compiling tokio v0.2.22
[INFO] [stderr]    Compiling tracing v0.1.19
[INFO] [stderr]    Compiling pin-project v0.4.23
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling tracing-futures v0.2.4
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tls v0.3.1
[INFO] [stderr]    Compiling h2 v0.2.6
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling hyper v0.13.8
[INFO] [stderr]    Compiling hyper-tls v0.4.3
[INFO] [stderr]    Compiling hyper-proxy v0.6.0
[INFO] [stderr]    Compiling tbot v0.5.3
[INFO] [stderr]    Compiling uzh-biomed-bot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[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 `uzh-biomed-bot`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "1252dddc1bcadbd43ac9d2058d19c829ee73b47f82280bf17901611c40d5b604", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1252dddc1bcadbd43ac9d2058d19c829ee73b47f82280bf17901611c40d5b604", kill_on_drop: false }`
[INFO] [stdout] 1252dddc1bcadbd43ac9d2058d19c829ee73b47f82280bf17901611c40d5b604