[INFO] updating cached repository xfix/PSDevBot-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/xfix/PSDevBot-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/xfix/PSDevBot-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/PSDevBot-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/PSDevBot-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/xfix/PSDevBot-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/xfix/PSDevBot-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/xfix/PSDevBot-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 11ecdfab021ad36dbb439f5a414cb6c0075b159e
[INFO] sha for GitHub repo xfix/PSDevBot-rust: 11ecdfab021ad36dbb439f5a414cb6c0075b159e
[INFO] validating manifest of xfix/PSDevBot-rust 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 xfix/PSDevBot-rust 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 xfix/PSDevBot-rust
[INFO] finished frobbing xfix/PSDevBot-rust
[INFO] frobbed toml for xfix/PSDevBot-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/xfix/PSDevBot-rust/Cargo.toml
[INFO] started frobbing xfix/PSDevBot-rust
[INFO] finished frobbing xfix/PSDevBot-rust
[INFO] frobbed toml for xfix/PSDevBot-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/xfix/PSDevBot-rust/Cargo.toml
[INFO] crate xfix/PSDevBot-rust 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 xfix/PSDevBot-rust 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/xfix/PSDevBot-rust:/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] 4b6229214e437a777bb1d7832d5c12f4355154ee22b754275f26c5f32b989b2e
[INFO] running `"docker" "start" "-a" "4b6229214e437a777bb1d7832d5c12f4355154ee22b754275f26c5f32b989b2e"`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling cc v1.0.31
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling openssl v0.10.20
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling string v0.1.3
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[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 urlencoding v1.0.0
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling unicase v2.3.0
[INFO] [stderr]    Compiling tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling im v12.3.3
[INFO] [stderr]    Compiling sentry v0.13.0
[INFO] [stderr]    Compiling sized-chunks v0.1.2
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[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" "4b6229214e437a777bb1d7832d5c12f4355154ee22b754275f26c5f32b989b2e"`
[INFO] running `"docker" "rm" "-f" "4b6229214e437a777bb1d7832d5c12f4355154ee22b754275f26c5f32b989b2e"`
[INFO] [stdout] 4b6229214e437a777bb1d7832d5c12f4355154ee22b754275f26c5f32b989b2e