[INFO] cloning repository https://github.com/gen0x39/gba-engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gen0x39/gba-engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgen0x39%2Fgba-engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgen0x39%2Fgba-engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b77472582ce8f1100f224a03e3801d2014dd170c
[INFO] testing gen0x39/gba-engine against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgen0x39%2Fgba-engine" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  86% (133/153)
Updating files:  87% (134/153)
Updating files:  88% (135/153)
Updating files:  89% (137/153)
Updating files:  90% (138/153)
Updating files:  91% (140/153)
Updating files:  92% (141/153)
Updating files:  93% (143/153)
Updating files:  94% (144/153)
Updating files:  95% (146/153)
Updating files:  96% (147/153)
Updating files:  97% (149/153)
Updating files:  98% (150/153)
Updating files:  99% (152/153)
Updating files: 100% (153/153)
Updating files: 100% (153/153), done.
[INFO] validating manifest of git repo https://github.com/gen0x39/gba-engine 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/gen0x39/gba-engine
[INFO] finished tweaking git repo https://github.com/gen0x39/gba-engine
[INFO] tweaked toml for git repo https://github.com/gen0x39/gba-engine written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/gen0x39/gba-engine 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 34129a2bb4a4bcfa724f91079d3fd0c9def173f87b5679f9181ede560398b567
[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" "34129a2bb4a4bcfa724f91079d3fd0c9def173f87b5679f9181ede560398b567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34129a2bb4a4bcfa724f91079d3fd0c9def173f87b5679f9181ede560398b567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34129a2bb4a4bcfa724f91079d3fd0c9def173f87b5679f9181ede560398b567", kill_on_drop: false }`
[INFO] [stdout] 34129a2bb4a4bcfa724f91079d3fd0c9def173f87b5679f9181ede560398b567
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 92d589adb527aef18ca2297a8ece975889b9b5fca4a3707ac6623c40ae2924ab
[INFO] running `Command { std: "docker" "start" "-a" "92d589adb527aef18ca2297a8ece975889b9b5fca4a3707ac6623c40ae2924ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling linked_list_allocator v0.8.6
[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-0.8.6/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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] running `Command { std: "docker" "inspect" "92d589adb527aef18ca2297a8ece975889b9b5fca4a3707ac6623c40ae2924ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92d589adb527aef18ca2297a8ece975889b9b5fca4a3707ac6623c40ae2924ab", kill_on_drop: false }`
[INFO] [stdout] 92d589adb527aef18ca2297a8ece975889b9b5fca4a3707ac6623c40ae2924ab