[INFO] fetching crate rhythmc_macros 0.0.2...
[INFO] testing rhythmc_macros-0.0.2 against 1.59.0 for beta-1.60-1
[INFO] extracting crate rhythmc_macros 0.0.2 into /workspace/builds/worker-94/source
[INFO] validating manifest of crates.io crate rhythmc_macros 0.0.2 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-94/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded glsl v6.0.1
[INFO] [stderr]   Downloaded rhythmc_compiler v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 386a86970cb13b74a7a8467d839df41622951fb90c238f2948987e14ff75f389
[INFO] running `Command { std: "docker" "start" "-a" "386a86970cb13b74a7a8467d839df41622951fb90c238f2948987e14ff75f389", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "386a86970cb13b74a7a8467d839df41622951fb90c238f2948987e14ff75f389", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "386a86970cb13b74a7a8467d839df41622951fb90c238f2948987e14ff75f389", kill_on_drop: false }`
[INFO] [stdout] 386a86970cb13b74a7a8467d839df41622951fb90c238f2948987e14ff75f389
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af0c887aaefc608684469d1e57551f291a11ff364bb977913ca4bcc38ce81f96
[INFO] running `Command { std: "docker" "start" "-a" "af0c887aaefc608684469d1e57551f291a11ff364bb977913ca4bcc38ce81f96", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]    Compiling bitvec v0.19.6
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling glsl v6.0.1
[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 stable 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` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "af0c887aaefc608684469d1e57551f291a11ff364bb977913ca4bcc38ce81f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af0c887aaefc608684469d1e57551f291a11ff364bb977913ca4bcc38ce81f96", kill_on_drop: false }`
[INFO] [stdout] af0c887aaefc608684469d1e57551f291a11ff364bb977913ca4bcc38ce81f96