[INFO] cloning repository https://github.com/unic0rn9k/tagstack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/unic0rn9k/tagstack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funic0rn9k%2Ftagstack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funic0rn9k%2Ftagstack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 26571df2edc3932c224d9aedd3961f0bf3b0ca2d
[INFO] testing unic0rn9k/tagstack against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funic0rn9k%2Ftagstack" "/workspace/builds/worker-114/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-114/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/unic0rn9k/tagstack 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/unic0rn9k/tagstack
[INFO] finished tweaking git repo https://github.com/unic0rn9k/tagstack
[INFO] tweaked toml for git repo https://github.com/unic0rn9k/tagstack written to /workspace/builds/worker-114/source/Cargo.toml
[INFO] crate git repo https://github.com/unic0rn9k/tagstack 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/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] 120cfdf4643aad1524cd61cb32b3da53357b653b64eab6620e5a38200eb3270b
[INFO] running `Command { std: "docker" "start" "-a" "120cfdf4643aad1524cd61cb32b3da53357b653b64eab6620e5a38200eb3270b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "120cfdf4643aad1524cd61cb32b3da53357b653b64eab6620e5a38200eb3270b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "120cfdf4643aad1524cd61cb32b3da53357b653b64eab6620e5a38200eb3270b", kill_on_drop: false }`
[INFO] [stdout] 120cfdf4643aad1524cd61cb32b3da53357b653b64eab6620e5a38200eb3270b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/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] 61f32c51fa709c905d33c2ae9a1361c1f6c82b6d71475919520de4f693416d7a
[INFO] running `Command { std: "docker" "start" "-a" "61f32c51fa709c905d33c2ae9a1361c1f6c82b6d71475919520de4f693416d7a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling flagstack v0.1.0 (/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(const_trait_impl, const_fn_trait_bound)]
[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 `flagstack` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "61f32c51fa709c905d33c2ae9a1361c1f6c82b6d71475919520de4f693416d7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61f32c51fa709c905d33c2ae9a1361c1f6c82b6d71475919520de4f693416d7a", kill_on_drop: false }`
[INFO] [stdout] 61f32c51fa709c905d33c2ae9a1361c1f6c82b6d71475919520de4f693416d7a