[INFO] cloning repository https://github.com/Starlight-JS/Starlight
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Starlight-JS/Starlight" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStarlight-JS%2FStarlight", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStarlight-JS%2FStarlight'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55daef22c1429fd30b42cae6529e5d60010f8266
[INFO] testing Starlight-JS/Starlight against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStarlight-JS%2FStarlight" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Starlight-JS/Starlight on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Starlight-JS/Starlight
[INFO] finished tweaking git repo https://github.com/Starlight-JS/Starlight
[INFO] tweaked toml for git repo https://github.com/Starlight-JS/Starlight written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Starlight-JS/Starlight already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc15f0fcfef36dcf36f58656647e9413c13f2d3001d01bfa3246aff01eb79f7a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fc15f0fcfef36dcf36f58656647e9413c13f2d3001d01bfa3246aff01eb79f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc15f0fcfef36dcf36f58656647e9413c13f2d3001d01bfa3246aff01eb79f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc15f0fcfef36dcf36f58656647e9413c13f2d3001d01bfa3246aff01eb79f7a", kill_on_drop: false }`
[INFO] [stdout] fc15f0fcfef36dcf36f58656647e9413c13f2d3001d01bfa3246aff01eb79f7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 2fdc245d22ec3e5e0be7902e22a9394e4997bed39fcafa3eb33655102461723f
[INFO] running `Command { std: "docker" "start" "-a" "2fdc245d22ec3e5e0be7902e22a9394e4997bed39fcafa3eb33655102461723f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling siphasher v0.3.6
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling cty v0.2.1
[INFO] [stderr]    Compiling mopa v0.2.2
[INFO] [stderr]    Compiling starlight-bytecode v0.1.0 (/opt/rustwide/workdir/crates/starlight-bytecode)
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling generic_static v0.2.0
[INFO] [stderr]    Compiling jobserver v0.1.23
[INFO] [stderr]    Compiling errno v0.2.7
[INFO] [stderr]    Compiling memmap2 v0.3.0
[INFO] [stderr]    Compiling object v0.26.0
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> crates/starlight-bytecode/src/virtual_register.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling regress v0.4.1
[INFO] [stderr]    Compiling dashmap v4.0.2
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling intrusive-collections v0.9.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling num-format v0.4.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling wtf-rs v0.1.0 (/opt/rustwide/workdir/crates/wtf-rs)
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> crates/wtf-rs/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(backtrace)]
[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 `wtf-rs` 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" "2fdc245d22ec3e5e0be7902e22a9394e4997bed39fcafa3eb33655102461723f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fdc245d22ec3e5e0be7902e22a9394e4997bed39fcafa3eb33655102461723f", kill_on_drop: false }`
[INFO] [stdout] 2fdc245d22ec3e5e0be7902e22a9394e4997bed39fcafa3eb33655102461723f