[INFO] updating cached repository jsdw/boundvariable
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jsdw/boundvariable
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jsdw/boundvariable" "work/ex/beta-1.38-1/sources/1.37.0/gh/jsdw/boundvariable"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jsdw/boundvariable'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jsdw/boundvariable" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jsdw/boundvariable"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jsdw/boundvariable'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bfb34083f5a3b7588d31630f59538d6585f93dba
[INFO] sha for GitHub repo jsdw/boundvariable: bfb34083f5a3b7588d31630f59538d6585f93dba
[INFO] validating manifest of jsdw/boundvariable 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 jsdw/boundvariable 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 jsdw/boundvariable
[INFO] finished frobbing jsdw/boundvariable
[INFO] frobbed toml for jsdw/boundvariable written to work/ex/beta-1.38-1/sources/1.37.0/gh/jsdw/boundvariable/Cargo.toml
[INFO] started frobbing jsdw/boundvariable
[INFO] finished frobbing jsdw/boundvariable
[INFO] frobbed toml for jsdw/boundvariable written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jsdw/boundvariable/Cargo.toml
[INFO] crate jsdw/boundvariable 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 jsdw/boundvariable 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-6/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/jsdw/boundvariable:/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] 1f0081474329ea68defa12ff49656d4a2e6e8a9d266171117fb7f6dabec67e8b
[INFO] running `"docker" "start" "-a" "1f0081474329ea68defa12ff49656d4a2e6e8a9d266171117fb7f6dabec67e8b"`
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling lazycell v1.2.0
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling jemalloc-sys v0.1.8
[INFO] [stderr]    Compiling lock_api v0.1.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.5.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.0
[INFO] [stderr]    Compiling bytes v0.4.10
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta 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 crossbeam-deque v0.6.1
[INFO] [stderr]    Compiling crossbeam-deque v0.5.2
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling crossbeam-channel v0.2.6
[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" "1f0081474329ea68defa12ff49656d4a2e6e8a9d266171117fb7f6dabec67e8b"`
[INFO] running `"docker" "rm" "-f" "1f0081474329ea68defa12ff49656d4a2e6e8a9d266171117fb7f6dabec67e8b"`
[INFO] [stdout] 1f0081474329ea68defa12ff49656d4a2e6e8a9d266171117fb7f6dabec67e8b