[INFO] fetching crate axvirtio-blk 0.1.0...
[INFO] checking axvirtio-blk-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate axvirtio-blk 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate axvirtio-blk 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate axvirtio-blk 0.1.0
[INFO] tweaked toml for crates.io crate axvirtio-blk 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate axvirtio-blk 0.1.0 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 axvirtio-blk 0.1.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded axaddrspace v0.2.0
[INFO] [stderr]   Downloaded riscv v0.14.0
[INFO] [stderr]   Downloaded const_fn v0.4.11
[INFO] [stderr]   Downloaded page_table_multiarch v0.5.7
[INFO] [stderr]   Downloaded page_table_entry v0.5.7
[INFO] [stderr]   Downloaded riscv-pac v0.2.0
[INFO] [stderr]   Downloaded aarch64-cpu v10.0.0
[INFO] [stderr]   Downloaded numeric-enum-macro v0.2.0
[INFO] [stderr]   Downloaded tock-registers v0.9.0
[INFO] [stderr]   Downloaded axvirtio-common v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 14e707746d24e0e8cdeb19a70a07db0bb39b5651ce1742fc2249593f641006e3
[INFO] running `Command { std: "docker" "start" "-a" "14e707746d24e0e8cdeb19a70a07db0bb39b5651ce1742fc2249593f641006e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14e707746d24e0e8cdeb19a70a07db0bb39b5651ce1742fc2249593f641006e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14e707746d24e0e8cdeb19a70a07db0bb39b5651ce1742fc2249593f641006e3", kill_on_drop: false }`
[INFO] [stdout] 14e707746d24e0e8cdeb19a70a07db0bb39b5651ce1742fc2249593f641006e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 48881ddef8cc2f8b648ac82178df5b508f49197f11d6eb91a854a1e0e383ce65
[INFO] running `Command { std: "docker" "start" "-a" "48881ddef8cc2f8b648ac82178df5b508f49197f11d6eb91a854a1e0e383ce65", kill_on_drop: false }`
[INFO] [stderr]    Compiling const_fn v0.4.11
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]     Checking bit_field v0.10.3
[INFO] [stderr]    Compiling x86 v0.52.0
[INFO] [stderr]    Compiling axerrno v0.2.2
[INFO] [stderr]     Checking memory_addr v0.4.1
[INFO] [stderr]     Checking volatile v0.4.6
[INFO] [stderr]     Checking lazyinit v0.2.2
[INFO] [stderr]     Checking numeric-enum-macro v0.2.0
[INFO] [stderr]     Checking raw-cpuid v10.7.0
[INFO] [stderr]     Checking spin v0.10.0
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking memory_set v0.4.1
[INFO] [stderr]     Checking x86_64 v0.15.4
[INFO] [stderr]     Checking page_table_entry v0.5.7
[INFO] [stderr]    Compiling strum_macros v0.27.2
[INFO] [stderr]     Checking page_table_multiarch v0.5.7
[INFO] [stderr]     Checking strum v0.27.2
[INFO] [stderr]     Checking axerrno v0.1.2
[INFO] [stderr]     Checking axaddrspace v0.2.0
[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/axaddrspace-0.2.0/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_trait_impl)]
[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 `axaddrspace` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "48881ddef8cc2f8b648ac82178df5b508f49197f11d6eb91a854a1e0e383ce65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48881ddef8cc2f8b648ac82178df5b508f49197f11d6eb91a854a1e0e383ce65", kill_on_drop: false }`
[INFO] [stdout] 48881ddef8cc2f8b648ac82178df5b508f49197f11d6eb91a854a1e0e383ce65