[INFO] fetching crate git-repo-manager 0.6.1...
[INFO] testing git-repo-manager-0.6.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate git-repo-manager 0.6.1 into /workspace/builds/worker-108/source
[INFO] validating manifest of crates.io crate git-repo-manager 0.6.1 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 crates.io crate git-repo-manager 0.6.1
[INFO] finished tweaking crates.io crate git-repo-manager 0.6.1
[INFO] tweaked toml for crates.io crate git-repo-manager 0.6.1 written to /workspace/builds/worker-108/source/Cargo.toml
[INFO] crate crates.io crate git-repo-manager 0.6.1 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossterm v0.23.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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] db914967553b075b165700431e938c15090d20af6a9551a046d8074281670c4a
[INFO] running `Command { std: "docker" "start" "-a" "db914967553b075b165700431e938c15090d20af6a9551a046d8074281670c4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db914967553b075b165700431e938c15090d20af6a9551a046d8074281670c4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db914967553b075b165700431e938c15090d20af6a9551a046d8074281670c4a", kill_on_drop: false }`
[INFO] [stdout] db914967553b075b165700431e938c15090d20af6a9551a046d8074281670c4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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] f3332a5f33fe6b0a9f65227b5507a5f7ea5bae398d72720d71d91fa02402c863
[INFO] running `Command { std: "docker" "start" "-a" "f3332a5f33fe6b0a9f65227b5507a5f7ea5bae398d72720d71d91fa02402c863", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling strum v0.23.0
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling shellexpand v2.1.0
[INFO] [stderr]    Compiling signal-hook-mio v0.2.1
[INFO] [stderr]    Compiling crossterm v0.23.0
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling libssh2-sys v0.2.23
[INFO] [stderr]    Compiling libgit2-sys v0.12.26+1.3.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling git2 v0.13.25
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling strum_macros v0.23.1
[INFO] [stderr]    Compiling clap_derive v3.1.0
[INFO] [stderr]    Compiling comfy-table v5.0.1
[INFO] [stderr]    Compiling clap v3.1.1
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling serde_yaml v0.8.23
[INFO] [stderr]    Compiling git-repo-manager v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io_error_more)]
[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 `git-repo-manager` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f3332a5f33fe6b0a9f65227b5507a5f7ea5bae398d72720d71d91fa02402c863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3332a5f33fe6b0a9f65227b5507a5f7ea5bae398d72720d71d91fa02402c863", kill_on_drop: false }`
[INFO] [stdout] f3332a5f33fe6b0a9f65227b5507a5f7ea5bae398d72720d71d91fa02402c863