[INFO] crate cpclib 0.3.1-alpha is already in cache
[INFO] extracting crate cpclib 0.3.1-alpha into work/ex/beta-1.38-1/sources/1.37.0/reg/cpclib/0.3.1-alpha
[INFO] extracting crate cpclib 0.3.1-alpha into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cpclib/0.3.1-alpha
[INFO] validating manifest of cpclib-0.3.1-alpha on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cpclib-0.3.1-alpha on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cpclib-0.3.1-alpha
[INFO] finished frobbing cpclib-0.3.1-alpha
[INFO] frobbed toml for cpclib-0.3.1-alpha written to work/ex/beta-1.38-1/sources/1.37.0/reg/cpclib/0.3.1-alpha/Cargo.toml
[INFO] started frobbing cpclib-0.3.1-alpha
[INFO] finished frobbing cpclib-0.3.1-alpha
[INFO] frobbed toml for cpclib-0.3.1-alpha written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cpclib/0.3.1-alpha/Cargo.toml
[INFO] crate cpclib-0.3.1-alpha already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing cpclib-0.3.1-alpha against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cpclib/0.3.1-alpha:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] b1ef21c3b170a6aadeb348742a4fae64434198624adeeafbdc91605f11effead
[INFO] running `"docker" "start" "-a" "b1ef21c3b170a6aadeb348742a4fae64434198624adeeafbdc91605f11effead"`
[INFO] [stderr]    Compiling piston-float v0.3.0
[INFO] [stderr]    Compiling delegate v0.2.0
[INFO] [stderr]    Compiling custom_error v1.6.0
[INFO] [stderr]    Compiling bitsets v0.1.1
[INFO] [stderr]    Compiling slice-of-array v0.2.1
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling libgit2-sys v0.8.1
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]    Compiling nom v5.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling vecmath v0.3.1
[INFO] [stderr]    Compiling casey v0.1.1
[INFO] [stderr]    Compiling getrandom v0.1.6
[INFO] [stderr]    Compiling stackvector v1.0.6
[INFO] [stderr]    Compiling lexical-core v0.4.2
[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 rand_core v0.5.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]    Compiling toml v0.5.1
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling paste-impl v0.1.5
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling paste v0.1.5
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling rayon v1.1.0
[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 image v0.20.1
[INFO] [stderr]    Compiling git2 v0.9.1
[INFO] [stderr]    Compiling built v0.3.1
[INFO] [stderr]    Compiling cpclib v0.3.1-alpha (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta 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 beta 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 beta 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 beta 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" "b1ef21c3b170a6aadeb348742a4fae64434198624adeeafbdc91605f11effead"`
[INFO] running `"docker" "rm" "-f" "b1ef21c3b170a6aadeb348742a4fae64434198624adeeafbdc91605f11effead"`
[INFO] [stdout] b1ef21c3b170a6aadeb348742a4fae64434198624adeeafbdc91605f11effead