[INFO] updating cached repository SirVer/giti
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/SirVer/giti
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/SirVer/giti" "work/ex/beta-1.38-1/sources/1.37.0/gh/SirVer/giti"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/SirVer/giti'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/SirVer/giti" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SirVer/giti"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SirVer/giti'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2f2cf5d1e6975a241a398b5b4318277b77f4c570
[INFO] sha for GitHub repo SirVer/giti: 2f2cf5d1e6975a241a398b5b4318277b77f4c570
[INFO] validating manifest of SirVer/giti 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 SirVer/giti 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 SirVer/giti
[INFO] finished frobbing SirVer/giti
[INFO] frobbed toml for SirVer/giti written to work/ex/beta-1.38-1/sources/1.37.0/gh/SirVer/giti/Cargo.toml
[INFO] started frobbing SirVer/giti
[INFO] finished frobbing SirVer/giti
[INFO] frobbed toml for SirVer/giti written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SirVer/giti/Cargo.toml
[INFO] crate SirVer/giti 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 SirVer/giti 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/SirVer/giti:/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] 697470855ca16801ad49008cb6f1bc119eb3673ae2d37d75211040c8c10d2bfd
[INFO] running `"docker" "start" "-a" "697470855ca16801ad49008cb6f1bc119eb3673ae2d37d75211040c8c10d2bfd"`
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling webbrowser v0.3.1
[INFO] [stderr]    Compiling default-editor v0.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.2
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.15
[INFO] [stderr]    Compiling libssh2-sys v0.2.11
[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/futures-0.1.25/src/lib.rs:161:34
[INFO] [stderr]     |
[INFO] [stderr] 161 | #![cfg_attr(feature = "nightly", feature(pin))]
[INFO] [stderr]     |                                  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling libgit2-sys v0.7.10
[INFO] [stderr]    Compiling getopts v0.2.19
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling filetime v0.2.4
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling pbr v1.0.1
[INFO] [stderr]    Compiling tempdir v0.3.7
[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 `futures`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "697470855ca16801ad49008cb6f1bc119eb3673ae2d37d75211040c8c10d2bfd"`
[INFO] running `"docker" "rm" "-f" "697470855ca16801ad49008cb6f1bc119eb3673ae2d37d75211040c8c10d2bfd"`
[INFO] [stdout] 697470855ca16801ad49008cb6f1bc119eb3673ae2d37d75211040c8c10d2bfd