[INFO] crate cpclib 0.3.1-alpha is already in cache
[INFO] testing cpclib-0.3.1-alpha against 1.38.0 for beta-1.39-1
[INFO] extracting crate cpclib 0.3.1-alpha into work/builds/worker-3/source
[INFO] validating manifest of crates.io crate cpclib 0.3.1-alpha 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 cpclib 0.3.1-alpha
[INFO] finished tweaking crates.io crate cpclib 0.3.1-alpha
[INFO] tweaked toml for crates.io crate cpclib 0.3.1-alpha written to work/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate cpclib 0.3.1-alpha 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/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] d9662f8a0cfb7e46775b50bfedbe2e81a6c9b120fc8cf473fe60f3060da913ff
[INFO] running `"docker" "start" "-a" "d9662f8a0cfb7e46775b50bfedbe2e81a6c9b120fc8cf473fe60f3060da913ff"`
[INFO] [stderr]    Compiling static_assertions v0.2.5
[INFO] [stderr]    Compiling bitsets v0.1.1
[INFO] [stderr]    Compiling slice-of-array v0.2.1
[INFO] [stderr]    Compiling delegate v0.2.0
[INFO] [stderr]    Compiling custom_error v1.6.0
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libgit2-sys v0.8.1
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling nom v5.0.0
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling casey v0.1.1
[INFO] [stderr]    Compiling stackvector v1.0.6
[INFO] [stderr]    Compiling lexical-core v0.4.2
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling getset v0.0.6
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.8
[INFO] [stderr]    Compiling num_enum v0.2.3
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling rayon v1.1.0
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling paste-impl v0.1.5
[INFO] [stderr]    Compiling tiff v0.2.2
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling paste v0.1.5
[INFO] [stderr]    Compiling image v0.20.1
[INFO] [stderr]    Compiling toml v0.5.1
[INFO] [stderr]    Compiling git2 v0.9.1
[INFO] [stderr]    Compiling built v0.3.1
[INFO] [stderr]    Compiling cpclib v0.3.1-alpha (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(type_ascription)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(proc_macro_hygiene)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(vec_drain_as_slice)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `cpclib`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d9662f8a0cfb7e46775b50bfedbe2e81a6c9b120fc8cf473fe60f3060da913ff"`
[INFO] running `"docker" "rm" "-f" "d9662f8a0cfb7e46775b50bfedbe2e81a6c9b120fc8cf473fe60f3060da913ff"`
[INFO] [stdout] d9662f8a0cfb7e46775b50bfedbe2e81a6c9b120fc8cf473fe60f3060da913ff