[INFO] updating cached repository https://github.com/entropic-dev/dstopic
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 71d2558e380fc53dd148e326679ba32301c85dba
[INFO] testing entropic-dev/dstopic against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fentropic-dev%2Fdstopic" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/entropic-dev/dstopic on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/entropic-dev/dstopic
[INFO] removed workspace from git repo https://github.com/entropic-dev/dstopic
[INFO] finished tweaking git repo https://github.com/entropic-dev/dstopic
[INFO] tweaked toml for git repo https://github.com/entropic-dev/dstopic written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/entropic-dev/dstopic already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] ac883fabd5c6f5026439bd65579cca3b998c35f56d6435bf3e44a6353a59afb1
[INFO] running `"docker" "start" "-a" "ac883fabd5c6f5026439bd65579cca3b998c35f56d6435bf3e44a6353a59afb1"`
[INFO] [stderr]    Compiling mkdirp v1.0.0
[INFO] [stderr]    Compiling openssl-sys v0.9.47
[INFO] [stderr]    Compiling block-padding v0.1.4
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling hyper v0.12.31
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.2.2
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling flate2 v1.0.9
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling sha-1 v0.8.1
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling http v0.1.17
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling publicsuffix v1.5.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling h2 v0.1.25
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling chownr v2.0.0
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling ssri v3.0.0
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling cacache v1.0.1
[INFO] [stderr]    Compiling reqwest v0.9.18
[INFO] [stderr]    Compiling dstopic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(async_await)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `cacache`
[INFO] [stderr]  --> src/fetch.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use cacache;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `reqwest`
[INFO] [stderr]  --> src/fetch.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use reqwest;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[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 `dstopic`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ac883fabd5c6f5026439bd65579cca3b998c35f56d6435bf3e44a6353a59afb1"`
[INFO] running `"docker" "rm" "-f" "ac883fabd5c6f5026439bd65579cca3b998c35f56d6435bf3e44a6353a59afb1"`
[INFO] [stdout] ac883fabd5c6f5026439bd65579cca3b998c35f56d6435bf3e44a6353a59afb1