[INFO] fetching crate gridsim 0.6.1...
[INFO] testing gridsim-0.6.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate gridsim 0.6.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate gridsim 0.6.1 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] started tweaking crates.io crate gridsim 0.6.1
[INFO] finished tweaking crates.io crate gridsim 0.6.1
[INFO] tweaked toml for crates.io crate gridsim 0.6.1 written to /workspace/builds/worker-1/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 84fe861c82d7395db5e1f02bbb63f7d2acf641e4acd9f062b38b13ea6518fd8e
[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" "84fe861c82d7395db5e1f02bbb63f7d2acf641e4acd9f062b38b13ea6518fd8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84fe861c82d7395db5e1f02bbb63f7d2acf641e4acd9f062b38b13ea6518fd8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84fe861c82d7395db5e1f02bbb63f7d2acf641e4acd9f062b38b13ea6518fd8e", kill_on_drop: false }`
[INFO] [stdout] 84fe861c82d7395db5e1f02bbb63f7d2acf641e4acd9f062b38b13ea6518fd8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "build" "--frozen" "--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] 7cf2e74bc0a6715185331e1e9e6180becac0a2730eff991dee6aa9c3b30a23e0
[INFO] running `Command { std: "docker" "start" "-a" "7cf2e74bc0a6715185331e1e9e6180becac0a2730eff991dee6aa9c3b30a23e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling ndarray v0.14.0
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling gridsim v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(generic_associated_types)]
[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: could not compile `gridsim` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7cf2e74bc0a6715185331e1e9e6180becac0a2730eff991dee6aa9c3b30a23e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cf2e74bc0a6715185331e1e9e6180becac0a2730eff991dee6aa9c3b30a23e0", kill_on_drop: false }`
[INFO] [stdout] 7cf2e74bc0a6715185331e1e9e6180becac0a2730eff991dee6aa9c3b30a23e0