[INFO] fetching crate rhythmc_macros 0.0.2...
[INFO] testing rhythmc_macros-0.0.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate rhythmc_macros 0.0.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate rhythmc_macros 0.0.2 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rhythmc_macros 0.0.2
[INFO] finished tweaking crates.io crate rhythmc_macros 0.0.2
[INFO] tweaked toml for crates.io crate rhythmc_macros 0.0.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded glsl v6.0.0
[INFO] [stderr]   Downloaded rhythmc_compiler v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70f8453967ff97021238692c9ab105ed3d5aebd0948631075726b732d3b6cbd2
[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" "70f8453967ff97021238692c9ab105ed3d5aebd0948631075726b732d3b6cbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70f8453967ff97021238692c9ab105ed3d5aebd0948631075726b732d3b6cbd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70f8453967ff97021238692c9ab105ed3d5aebd0948631075726b732d3b6cbd2", kill_on_drop: false }`
[INFO] [stdout] 70f8453967ff97021238692c9ab105ed3d5aebd0948631075726b732d3b6cbd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3950ca29a6ddd64e0de6e41361705bcc6702f719c1932688a0d01070550d255c
[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" "3950ca29a6ddd64e0de6e41361705bcc6702f719c1932688a0d01070550d255c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling nom v6.0.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling glsl v6.0.0
[INFO] [stderr]    Compiling rhythmc_compiler v0.0.2
[INFO] [stderr]    Compiling rhythmc_macros v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |   custom_inner_attributes,
[INFO] [stdout] 3 | |   proc_macro_span,
[INFO] [stdout] 4 | |   proc_macro_diagnostic,
[INFO] [stdout] 5 | |   proc_macro_def_site
[INFO] [stdout] 6 | | )]
[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 `rhythmc_macros`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "3950ca29a6ddd64e0de6e41361705bcc6702f719c1932688a0d01070550d255c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3950ca29a6ddd64e0de6e41361705bcc6702f719c1932688a0d01070550d255c", kill_on_drop: false }`
[INFO] [stdout] 3950ca29a6ddd64e0de6e41361705bcc6702f719c1932688a0d01070550d255c