[INFO] fetching crate oak-sass 0.0.11...
[INFO] checking oak-sass-0.0.11 against 1.95.0 for pr-155915
[INFO] extracting crate oak-sass 0.0.11 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate oak-sass 0.0.11
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate oak-sass 0.0.11
[INFO] tweaked toml for crates.io crate oak-sass 0.0.11 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate oak-sass 0.0.11 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate oak-sass 0.0.11 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66c602c0e7e0fadc27a03e884e94b2fbafd1f57829b812fe9d7dab398136623b
[INFO] running `Command { std: "docker" "start" "-a" "66c602c0e7e0fadc27a03e884e94b2fbafd1f57829b812fe9d7dab398136623b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66c602c0e7e0fadc27a03e884e94b2fbafd1f57829b812fe9d7dab398136623b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66c602c0e7e0fadc27a03e884e94b2fbafd1f57829b812fe9d7dab398136623b", kill_on_drop: false }`
[INFO] [stdout] 66c602c0e7e0fadc27a03e884e94b2fbafd1f57829b812fe9d7dab398136623b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fa862a8d2c57c9ab1644828a050468d065c0fbd710fd77a88ee3e801afe292b
[INFO] running `Command { std: "docker" "start" "-a" "8fa862a8d2c57c9ab1644828a050468d065c0fbd710fd77a88ee3e801afe292b", kill_on_drop: false }`
[INFO] [stderr]     Checking oak-core v0.0.11
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/oak-core-0.0.11/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(allocator_api)] // Required for custom arena allocation and manual memory management
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `oak-core` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8fa862a8d2c57c9ab1644828a050468d065c0fbd710fd77a88ee3e801afe292b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fa862a8d2c57c9ab1644828a050468d065c0fbd710fd77a88ee3e801afe292b", kill_on_drop: false }`
[INFO] [stdout] 8fa862a8d2c57c9ab1644828a050468d065c0fbd710fd77a88ee3e801afe292b