[INFO] crate rustv 0.5.1 is already in cache
[INFO] extracting crate rustv 0.5.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/rustv/0.5.1
[INFO] extracting crate rustv 0.5.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustv/0.5.1
[INFO] validating manifest of rustv-0.5.1 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 rustv-0.5.1 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 rustv-0.5.1
[INFO] removed path dependency elfloader32 from rustv-0.5.1
[INFO] finished frobbing rustv-0.5.1
[INFO] frobbed toml for rustv-0.5.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rustv/0.5.1/Cargo.toml
[INFO] started frobbing rustv-0.5.1
[INFO] removed path dependency elfloader32 from rustv-0.5.1
[INFO] finished frobbing rustv-0.5.1
[INFO] frobbed toml for rustv-0.5.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustv/0.5.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 rustv-0.5.1 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/rustv/0.5.1:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4bf673dd48af410b0aeb7fad6b489d47fa68da96f337b9d7cb247a6037fcf86d
[INFO] running `"docker" "start" "-a" "4bf673dd48af410b0aeb7fad6b489d47fa68da96f337b9d7cb247a6037fcf86d"`
[INFO] [stderr]    Compiling elfloader32 v0.0.3
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/elfloader32-0.0.3/src/lib.rs:1:56
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(no_std, core, core_prelude, core_slice_ext, custom_derive)]
[INFO] [stderr]   |                                                        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: subsumed by `#[proc_macro_derive]`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/elfloader32-0.0.3/src/lib.rs:1:56
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(no_std, core, core_prelude, core_slice_ext, custom_derive)]
[INFO] [stderr]   |                                                        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/elfloader32-0.0.3/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(no_std, core, core_prelude, core_slice_ext, custom_derive)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `elfloader32`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4bf673dd48af410b0aeb7fad6b489d47fa68da96f337b9d7cb247a6037fcf86d"`
[INFO] running `"docker" "rm" "-f" "4bf673dd48af410b0aeb7fad6b489d47fa68da96f337b9d7cb247a6037fcf86d"`
[INFO] [stdout] 4bf673dd48af410b0aeb7fad6b489d47fa68da96f337b9d7cb247a6037fcf86d