[INFO] fetching crate newport_graphics 0.2.0...
[INFO] testing newport_graphics-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate newport_graphics 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate newport_graphics 0.2.0 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 crates.io crate newport_graphics 0.2.0
[INFO] finished tweaking crates.io crate newport_graphics 0.2.0
[INFO] tweaked toml for crates.io crate newport_graphics 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 64faf9a6124ae49d7b81f220fa47077d84dd4ac0200a78e9685e0335cd3179a2
[INFO] running `Command { std: "docker" "start" "-a" "64faf9a6124ae49d7b81f220fa47077d84dd4ac0200a78e9685e0335cd3179a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64faf9a6124ae49d7b81f220fa47077d84dd4ac0200a78e9685e0335cd3179a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64faf9a6124ae49d7b81f220fa47077d84dd4ac0200a78e9685e0335cd3179a2", kill_on_drop: false }`
[INFO] [stdout] 64faf9a6124ae49d7b81f220fa47077d84dd4ac0200a78e9685e0335cd3179a2
[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: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] 366e783ecab655289f76815953b73749c58535f972e13a159b282e370d0a13dc
[INFO] running `Command { std: "docker" "start" "-a" "366e783ecab655289f76815953b73749c58535f972e13a159b282e370d0a13dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling com-rs v0.2.1
[INFO] [stderr]    Compiling inflections v1.1.1
[INFO] [stderr]    Compiling newport_gpu v0.2.0
[INFO] [stderr]    Compiling stb_image v0.2.3
[INFO] [stderr]    Compiling freetype-sys v0.14.0
[INFO] [stderr]    Compiling ash v0.32.1
[INFO] [stderr]    Compiling image v0.23.14
[INFO] [stderr]    Compiling newport_math v0.2.0
[INFO] [stderr]    Compiling ron v0.6.5
[INFO] [stderr]    Compiling serde_json v1.0.67
[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/newport_math-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn_floating_point_arithmetic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/newport_math-0.2.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_float_classify)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling gltf-derive v0.16.0
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `newport_math` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "366e783ecab655289f76815953b73749c58535f972e13a159b282e370d0a13dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "366e783ecab655289f76815953b73749c58535f972e13a159b282e370d0a13dc", kill_on_drop: false }`
[INFO] [stdout] 366e783ecab655289f76815953b73749c58535f972e13a159b282e370d0a13dc