[INFO] fetching crate bandsocks-sand 0.2.0...
[INFO] testing bandsocks-sand-0.2.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate bandsocks-sand 0.2.0 into /workspace/builds/worker-22/source
[INFO] validating manifest of crates.io crate bandsocks-sand 0.2.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bandsocks-sand 0.2.0
[INFO] finished tweaking crates.io crate bandsocks-sand 0.2.0
[INFO] tweaked toml for crates.io crate bandsocks-sand 0.2.0 written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate crates.io crate bandsocks-sand 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2c7cdb7fefba2d13d518ac9f3544fe94b2a1da611b41a2c1a00bc9f45013f25
[INFO] running `Command { std: "docker" "start" "-a" "a2c7cdb7fefba2d13d518ac9f3544fe94b2a1da611b41a2c1a00bc9f45013f25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2c7cdb7fefba2d13d518ac9f3544fe94b2a1da611b41a2c1a00bc9f45013f25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2c7cdb7fefba2d13d518ac9f3544fe94b2a1da611b41a2c1a00bc9f45013f25", kill_on_drop: false }`
[INFO] [stdout] a2c7cdb7fefba2d13d518ac9f3544fe94b2a1da611b41a2c1a00bc9f45013f25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 82c98b23b6a41ea392d8d61ee8fa917dab817f060fbcc2f9373cc4d49ed54f52
[INFO] running `Command { std: "docker" "start" "-a" "82c98b23b6a41ea392d8d61ee8fa917dab817f060fbcc2f9373cc4d49ed54f52", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling compiler_builtins v0.1.36
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling scroll v0.10.2
[INFO] [stderr]    Compiling unchecked-index v0.2.2
[INFO] [stderr]    Compiling sc v0.2.3
[INFO] [stderr]    Compiling plain v0.2.3
[INFO] [stderr]    Compiling proc-macro2 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/sc-0.2.3/src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(llvm_asm)]
[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 `sc` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "82c98b23b6a41ea392d8d61ee8fa917dab817f060fbcc2f9373cc4d49ed54f52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82c98b23b6a41ea392d8d61ee8fa917dab817f060fbcc2f9373cc4d49ed54f52", kill_on_drop: false }`
[INFO] [stdout] 82c98b23b6a41ea392d8d61ee8fa917dab817f060fbcc2f9373cc4d49ed54f52