[INFO] updating cached repository cheme/cv
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cheme/cv
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cheme/cv" "work/ex/beta-1.38-1/sources/1.37.0/gh/cheme/cv"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cheme/cv'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cheme/cv" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cheme/cv"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cheme/cv'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] af4b67e2aa5d9aef9c3ab8a48be8b0d8b7e056c0
[INFO] sha for GitHub repo cheme/cv: af4b67e2aa5d9aef9c3ab8a48be8b0d8b7e056c0
[INFO] validating manifest of cheme/cv 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 cheme/cv 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 cheme/cv
[INFO] removed 0 missing examples
[INFO] finished frobbing cheme/cv
[INFO] frobbed toml for cheme/cv written to work/ex/beta-1.38-1/sources/1.37.0/gh/cheme/cv/Cargo.toml
[INFO] started frobbing cheme/cv
[INFO] removed 0 missing examples
[INFO] finished frobbing cheme/cv
[INFO] frobbed toml for cheme/cv written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cheme/cv/Cargo.toml
[INFO] crate cheme/cv 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] testing cheme/cv 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/gh/cheme/cv:/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] afe90c44a59d9ba4310639629067b3e4b0cd2606c53a2aca5af9b7f2fc7401e0
[INFO] running `"docker" "start" "-a" "afe90c44a59d9ba4310639629067b3e4b0cd2606c53a2aca5af9b7f2fc7401e0"`
[INFO] [stderr]    Compiling rust-crypto v0.2.36 (https://github.com/cheme/rust-crypto.git#15e12c3a)
[INFO] [stderr]    Compiling base64 v0.8.0
[INFO] [stderr]    Compiling compress v0.1.2 (https://github.com/cheme/rust-compress.git#5c5c4640)
[INFO] [stderr]    Compiling cv v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::heap`
[INFO] [stderr]   --> src/main.rs:13:10
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::heap::{Alloc, Heap, Layout};
[INFO] [stderr]    |          ^^^^ could not find `heap` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(allocator_api)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(link_args)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::repeat`
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use std::iter::repeat;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `CStr`
[INFO] [stderr]   --> src/main.rs:27:3
[INFO] [stderr]    |
[INFO] [stderr] 27 |   CStr,
[INFO] [stderr]    |   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Cursor`, `Write`
[INFO] [stderr]   --> src/main.rs:31:3
[INFO] [stderr]    |
[INFO] [stderr] 31 |   Cursor,
[INFO] [stderr]    |   ^^^^^^
[INFO] [stderr] 32 |   Read,
[INFO] [stderr] 33 |   Write,
[INFO] [stderr]    |   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `cv`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "afe90c44a59d9ba4310639629067b3e4b0cd2606c53a2aca5af9b7f2fc7401e0"`
[INFO] running `"docker" "rm" "-f" "afe90c44a59d9ba4310639629067b3e4b0cd2606c53a2aca5af9b7f2fc7401e0"`
[INFO] [stdout] afe90c44a59d9ba4310639629067b3e4b0cd2606c53a2aca5af9b7f2fc7401e0