[INFO] fetching crate cluFullTransmute 1.0.3...
[INFO] testing cluFullTransmute-1.0.3 against 1.54.0 for beta-1.55-1
[INFO] extracting crate cluFullTransmute 1.0.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate cluFullTransmute 1.0.3 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cluFullTransmute 1.0.3
[INFO] finished tweaking crates.io crate cluFullTransmute 1.0.3
[INFO] tweaked toml for crates.io crate cluFullTransmute 1.0.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate cluFullTransmute 1.0.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78d25f0402d155566de477b4723ce2c58c6af5627206da898c6be7e4df3e20a8
[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" "78d25f0402d155566de477b4723ce2c58c6af5627206da898c6be7e4df3e20a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78d25f0402d155566de477b4723ce2c58c6af5627206da898c6be7e4df3e20a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78d25f0402d155566de477b4723ce2c58c6af5627206da898c6be7e4df3e20a8", kill_on_drop: false }`
[INFO] [stdout] 78d25f0402d155566de477b4723ce2c58c6af5627206da898c6be7e4df3e20a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 778a1c14b9c5857a35a16394d575f1f47fc62830ab3bf9906372c0d9f60e18a9
[INFO] running `Command { std: "docker" "start" "-a" "778a1c14b9c5857a35a16394d575f1f47fc62830ab3bf9906372c0d9f60e18a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling cluFullTransmute v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:133:1
[INFO] [stdout]     |
[INFO] [stdout] 133 | #![feature(untagged_unions)]
[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:134:1
[INFO] [stdout]     |
[INFO] [stdout] 134 | #![feature(const_fn_union)]
[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 `cluFullTransmute`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "778a1c14b9c5857a35a16394d575f1f47fc62830ab3bf9906372c0d9f60e18a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "778a1c14b9c5857a35a16394d575f1f47fc62830ab3bf9906372c0d9f60e18a9", kill_on_drop: false }`
[INFO] [stdout] 778a1c14b9c5857a35a16394d575f1f47fc62830ab3bf9906372c0d9f60e18a9
