[INFO] crate constellation-rs 0.1.5 is already in cache
[INFO] testing constellation-rs-0.1.5 against 1.38.0 for beta-1.39-1
[INFO] extracting crate constellation-rs 0.1.5 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate constellation-rs 0.1.5 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate constellation-rs 0.1.5
[INFO] removed 28 missing tests
[INFO] finished tweaking crates.io crate constellation-rs 0.1.5
[INFO] tweaked toml for crates.io crate constellation-rs 0.1.5 written to work/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate constellation-rs 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 02e39e196b1f51ee7791e3c31ae5509d928b1ee14ebd5c49341c300321300eb2
[INFO] running `"docker" "start" "-a" "02e39e196b1f51ee7791e3c31ae5509d928b1ee14ebd5c49341c300321300eb2"`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling heapless v0.5.1
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling twox-hash v1.5.0
[INFO] [stderr]    Compiling constellation-rs v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling replace_with v0.1.4
[INFO] [stderr]    Compiling once_cell v1.0.2
[INFO] [stderr]    Compiling hash32 v0.1.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling serde_bytes v0.11.2
[INFO] [stderr]    Compiling toml v0.5.3
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uuid-0.7.4/src/lib.rs:118:35
[INFO] [stderr]     |
[INFO] [stderr] 118 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cargo_metadata v0.8.2
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `uuid`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "02e39e196b1f51ee7791e3c31ae5509d928b1ee14ebd5c49341c300321300eb2"`
[INFO] running `"docker" "rm" "-f" "02e39e196b1f51ee7791e3c31ae5509d928b1ee14ebd5c49341c300321300eb2"`
[INFO] [stdout] 02e39e196b1f51ee7791e3c31ae5509d928b1ee14ebd5c49341c300321300eb2