[INFO] fetching crate bandsocks-sand 0.2.0...
[INFO] checking bandsocks-sand-0.2.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate bandsocks-sand 0.2.0 into /workspace/builds/worker-42/source
[INFO] validating manifest of crates.io crate bandsocks-sand 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 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-42/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" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded raw-cpuid v8.1.2
[INFO] [stderr]   Downloaded generic-array v0.13.2
[INFO] [stderr]   Downloaded proc-macro2 v0.3.8
[INFO] [stderr]   Downloaded syn v1.0.53
[INFO] [stderr]   Downloaded compiler_builtins v0.1.36
[INFO] [stderr]   Downloaded syn v0.13.11
[INFO] [stderr]   Downloaded as-slice v0.1.4
[INFO] [stderr]   Downloaded file_limit v0.0.2
[INFO] [stderr]   Downloaded seccomp-tiny v0.1.1
[INFO] [stderr]   Downloaded smalloca v0.1.0
[INFO] [stderr]   Downloaded hash32-derive v0.1.0
[INFO] [stderr]   Downloaded sc v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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] [stdout] 0b14f734bdb20b13971fd3907de3c79d5b0cd5ddf188ab67d47ed8c359086fd2
[INFO] running `Command { std: "docker" "start" "-a" "0b14f734bdb20b13971fd3907de3c79d5b0cd5ddf188ab67d47ed8c359086fd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b14f734bdb20b13971fd3907de3c79d5b0cd5ddf188ab67d47ed8c359086fd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b14f734bdb20b13971fd3907de3c79d5b0cd5ddf188ab67d47ed8c359086fd2", kill_on_drop: false }`
[INFO] [stdout] 0b14f734bdb20b13971fd3907de3c79d5b0cd5ddf188ab67d47ed8c359086fd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09209ecab98ae741c806473ea4283af3364d6ed12571bb1054979353b945b779
[INFO] running `Command { std: "docker" "start" "-a" "09209ecab98ae741c806473ea4283af3364d6ed12571bb1054979353b945b779", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[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 byteorder v1.3.4
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling compiler_builtins v0.1.36
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking unchecked-index v0.2.2
[INFO] [stderr]     Checking scroll v0.10.2
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]     Checking sc v0.2.3
[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:15:1
[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] [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:15:1
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "09209ecab98ae741c806473ea4283af3364d6ed12571bb1054979353b945b779", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09209ecab98ae741c806473ea4283af3364d6ed12571bb1054979353b945b779", kill_on_drop: false }`
[INFO] [stdout] 09209ecab98ae741c806473ea4283af3364d6ed12571bb1054979353b945b779
