[INFO] fetching crate web-glitz 0.2.1...
[INFO] testing web-glitz-0.2.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate web-glitz 0.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate web-glitz 0.2.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate web-glitz 0.2.1
[INFO] finished tweaking crates.io crate web-glitz 0.2.1
[INFO] tweaked toml for crates.io crate web-glitz 0.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 9a40e39740b9a46475755b3516ecdc8e7179b5cc677d4bccf72336ec9fd4fd4f
[INFO] running `Command { std: "docker" "start" "-a" "9a40e39740b9a46475755b3516ecdc8e7179b5cc677d4bccf72336ec9fd4fd4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a40e39740b9a46475755b3516ecdc8e7179b5cc677d4bccf72336ec9fd4fd4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a40e39740b9a46475755b3516ecdc8e7179b5cc677d4bccf72336ec9fd4fd4f", kill_on_drop: false }`
[INFO] [stdout] 9a40e39740b9a46475755b3516ecdc8e7179b5cc677d4bccf72336ec9fd4fd4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42a7a0d00af6351f81e9f4974567c1279fbcb07f1830d56e353fc1cf6269a7b5
[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" "42a7a0d00af6351f81e9f4974567c1279fbcb07f1830d56e353fc1cf6269a7b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.69
[INFO] [stderr]    Compiling staticvec v0.10.5
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.69
[INFO] [stderr]    Compiling std140-macros v0.1.0
[INFO] [stderr]    Compiling web-glitz-macros v0.2.0
[INFO] [stderr]    Compiling futures-util v0.3.8
[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/staticvec-0.10.5/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | / #![feature(
[INFO] [stdout] 32 | |   const_fn,
[INFO] [stdout] 33 | |   const_fn_union,
[INFO] [stdout] 34 | |   const_generics,
[INFO] [stdout] ...  |
[INFO] [stdout] 51 | |   untagged_unions
[INFO] [stdout] 52 | | )]
[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/staticvec-0.10.5/src/lib.rs:53:30
[INFO] [stdout]    |
[INFO] [stdout] 53 | #![cfg_attr(feature = "std", feature(read_initializer))]
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 `staticvec`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "42a7a0d00af6351f81e9f4974567c1279fbcb07f1830d56e353fc1cf6269a7b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42a7a0d00af6351f81e9f4974567c1279fbcb07f1830d56e353fc1cf6269a7b5", kill_on_drop: false }`
[INFO] [stdout] 42a7a0d00af6351f81e9f4974567c1279fbcb07f1830d56e353fc1cf6269a7b5