[INFO] cloning repository https://github.com/aarch64-switch-rs/ui2d
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aarch64-switch-rs/ui2d" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faarch64-switch-rs%2Fui2d", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faarch64-switch-rs%2Fui2d'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e9504819932a99f3a4eb67709cb8a4c8d8734c5
[INFO] testing aarch64-switch-rs/ui2d against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faarch64-switch-rs%2Fui2d" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aarch64-switch-rs/ui2d 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/aarch64-switch-rs/ui2d
[INFO] finished tweaking git repo https://github.com/aarch64-switch-rs/ui2d
[INFO] tweaked toml for git repo https://github.com/aarch64-switch-rs/ui2d written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/aarch64-switch-rs/ui2d 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]     Updating git repository `https://github.com/aarch64-switch-rs/nx`
[INFO] [stderr]     Updating git repository `https://github.com/aarch64-switch-rs/logpacket`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linked_list_allocator v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e2aebb9f33ed569ab9cb16db73f856f6bc6563111c1b98a08044baf7c6b169cd
[INFO] running `Command { std: "docker" "start" "-a" "e2aebb9f33ed569ab9cb16db73f856f6bc6563111c1b98a08044baf7c6b169cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2aebb9f33ed569ab9cb16db73f856f6bc6563111c1b98a08044baf7c6b169cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2aebb9f33ed569ab9cb16db73f856f6bc6563111c1b98a08044baf7c6b169cd", kill_on_drop: false }`
[INFO] [stdout] e2aebb9f33ed569ab9cb16db73f856f6bc6563111c1b98a08044baf7c6b169cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f621252a4d85d48d31547d35391faf422c84c695be55d366052cdc5b0c50ab6e
[INFO] running `Command { std: "docker" "start" "-a" "f621252a4d85d48d31547d35391faf422c84c695be55d366052cdc5b0c50ab6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling ttf-parser v0.6.2
[INFO] [stderr]    Compiling logpacket v0.1.0 (https://github.com/aarch64-switch-rs/logpacket#eb8b99fc)
[INFO] [stderr]    Compiling linked_list_allocator v0.9.0
[INFO] [stderr]    Compiling ab_glyph_rasterizer v0.1.4
[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/linked_list_allocator-0.9.0/src/lib.rs:1:41
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature = "const_mut_refs", feature(const_mut_refs))]
[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 `linked_list_allocator` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f621252a4d85d48d31547d35391faf422c84c695be55d366052cdc5b0c50ab6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f621252a4d85d48d31547d35391faf422c84c695be55d366052cdc5b0c50ab6e", kill_on_drop: false }`
[INFO] [stdout] f621252a4d85d48d31547d35391faf422c84c695be55d366052cdc5b0c50ab6e