[INFO] fetching crate rdxl_rss 0.0.1...
[INFO] testing rdxl_rss-0.0.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate rdxl_rss 0.0.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate rdxl_rss 0.0.1 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 crates.io crate rdxl_rss 0.0.1
[INFO] finished tweaking crates.io crate rdxl_rss 0.0.1
[INFO] tweaked toml for crates.io crate rdxl_rss 0.0.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b2bb0dbe99b91cbbf5635cd1bf744ef393508b3c2583b70b5d1eee6661c05a4
[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" "1b2bb0dbe99b91cbbf5635cd1bf744ef393508b3c2583b70b5d1eee6661c05a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b2bb0dbe99b91cbbf5635cd1bf744ef393508b3c2583b70b5d1eee6661c05a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b2bb0dbe99b91cbbf5635cd1bf744ef393508b3c2583b70b5d1eee6661c05a4", kill_on_drop: false }`
[INFO] [stdout] 1b2bb0dbe99b91cbbf5635cd1bf744ef393508b3c2583b70b5d1eee6661c05a4
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 84a247e7bbdb5357389eb27b38c254f3c75d928747f7611be6aeae0bf5abef3b
[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" "84a247e7bbdb5357389eb27b38c254f3c75d928747f7611be6aeae0bf5abef3b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling rdxl_internals v0.0.9
[INFO] [stderr]    Compiling rdxl v0.5.20
[INFO] [stderr]    Compiling rdxl_rss v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.51s
[INFO] running `Command { std: "docker" "inspect" "84a247e7bbdb5357389eb27b38c254f3c75d928747f7611be6aeae0bf5abef3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84a247e7bbdb5357389eb27b38c254f3c75d928747f7611be6aeae0bf5abef3b", kill_on_drop: false }`
[INFO] [stdout] 84a247e7bbdb5357389eb27b38c254f3c75d928747f7611be6aeae0bf5abef3b
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--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] f63cc16a5d5734151fb17129ebbcb9ed8379ea8abb2dff97e0dfe57386c1ba6a
[INFO] running `Command { std: "docker" "start" "-a" "f63cc16a5d5734151fb17129ebbcb9ed8379ea8abb2dff97e0dfe57386c1ba6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rdxl_rss v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/format.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rdxl_rss`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f63cc16a5d5734151fb17129ebbcb9ed8379ea8abb2dff97e0dfe57386c1ba6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f63cc16a5d5734151fb17129ebbcb9ed8379ea8abb2dff97e0dfe57386c1ba6a", kill_on_drop: false }`
[INFO] [stdout] f63cc16a5d5734151fb17129ebbcb9ed8379ea8abb2dff97e0dfe57386c1ba6a