[INFO] cloning repository https://github.com/PhotonQuantum/opam-file-format-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PhotonQuantum/opam-file-format-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhotonQuantum%2Fopam-file-format-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhotonQuantum%2Fopam-file-format-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d7423d42b33084307a18291d68bb1146cc883d6d
[INFO] testing PhotonQuantum/opam-file-format-rs against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhotonQuantum%2Fopam-file-format-rs" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PhotonQuantum/opam-file-format-rs on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PhotonQuantum/opam-file-format-rs
[INFO] finished tweaking git repo https://github.com/PhotonQuantum/opam-file-format-rs
[INFO] tweaked toml for git repo https://github.com/PhotonQuantum/opam-file-format-rs written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/PhotonQuantum/opam-file-format-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded beef v0.4.4
[INFO] [stderr]   Downloaded logos v0.11.4
[INFO] [stderr]   Downloaded logos-derive v0.11.5
[INFO] [stderr]   Downloaded unidecode v0.3.0
[INFO] [stderr]   Downloaded slugify v0.1.0
[INFO] [stderr]   Downloaded lalr v0.0.2
[INFO] [stderr]   Downloaded plex v0.2.5
[INFO] [stderr]   Downloaded redfa v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a823d5acd32ea8ad2ce1a0316992a933f72c2a128ef11e302d9672d5dd3f908
[INFO] running `Command { std: "docker" "start" "-a" "6a823d5acd32ea8ad2ce1a0316992a933f72c2a128ef11e302d9672d5dd3f908", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a823d5acd32ea8ad2ce1a0316992a933f72c2a128ef11e302d9672d5dd3f908", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a823d5acd32ea8ad2ce1a0316992a933f72c2a128ef11e302d9672d5dd3f908", kill_on_drop: false }`
[INFO] [stdout] 6a823d5acd32ea8ad2ce1a0316992a933f72c2a128ef11e302d9672d5dd3f908
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9e48368d88c9955609a55a734d4e4e48c069ffad0bf8602adf29a60e2aa5e47
[INFO] running `Command { std: "docker" "start" "-a" "e9e48368d88c9955609a55a734d4e4e48c069ffad0bf8602adf29a60e2aa5e47", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling regex-syntax v0.6.20
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling vec_map v0.6.0
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling lalr v0.0.2
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling unidecode v0.3.0
[INFO] [stderr]    Compiling partial_application v0.2.1
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling redfa v0.0.2
[INFO] [stderr]    Compiling aho-corasick v0.7.14
[INFO] [stderr]    Compiling slugify v0.1.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling regex v1.4.1
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]    Compiling plex v0.2.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/plex-0.2.5/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/plex-0.2.5/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(proc_macro_span)]
[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 `plex` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e9e48368d88c9955609a55a734d4e4e48c069ffad0bf8602adf29a60e2aa5e47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9e48368d88c9955609a55a734d4e4e48c069ffad0bf8602adf29a60e2aa5e47", kill_on_drop: false }`
[INFO] [stdout] e9e48368d88c9955609a55a734d4e4e48c069ffad0bf8602adf29a60e2aa5e47