[INFO] updating cached repository cdebotton/ApiTools
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cdebotton/ApiTools
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cdebotton/ApiTools" "work/ex/beta-1.38-1/sources/1.37.0/gh/cdebotton/ApiTools"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cdebotton/ApiTools'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cdebotton/ApiTools" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cdebotton/ApiTools"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cdebotton/ApiTools'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b8ddee23d2c79b4760629c6cd4d336a3e27fe4f3
[INFO] sha for GitHub repo cdebotton/ApiTools: b8ddee23d2c79b4760629c6cd4d336a3e27fe4f3
[INFO] validating manifest of cdebotton/ApiTools 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 cdebotton/ApiTools 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 cdebotton/ApiTools
[INFO] finished frobbing cdebotton/ApiTools
[INFO] frobbed toml for cdebotton/ApiTools written to work/ex/beta-1.38-1/sources/1.37.0/gh/cdebotton/ApiTools/Cargo.toml
[INFO] started frobbing cdebotton/ApiTools
[INFO] finished frobbing cdebotton/ApiTools
[INFO] frobbed toml for cdebotton/ApiTools written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cdebotton/ApiTools/Cargo.toml
[INFO] crate cdebotton/ApiTools 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 cdebotton/ApiTools 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cdebotton/ApiTools:/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] c4f9f8ba60b331d3dece65db9c95e8ba799aafdce103dd11ed8e40b68f01a013
[INFO] running `"docker" "start" "-a" "c4f9f8ba60b331d3dece65db9c95e8ba799aafdce103dd11ed8e40b68f01a013"`
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[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 aho-corasick v0.5.3
[INFO] [stderr]    Compiling regex v0.1.80
[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" "c4f9f8ba60b331d3dece65db9c95e8ba799aafdce103dd11ed8e40b68f01a013"`
[INFO] running `"docker" "rm" "-f" "c4f9f8ba60b331d3dece65db9c95e8ba799aafdce103dd11ed8e40b68f01a013"`
[INFO] [stdout] c4f9f8ba60b331d3dece65db9c95e8ba799aafdce103dd11ed8e40b68f01a013