[INFO] updating cached repository Ralith/rackup
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Ralith/rackup
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Ralith/rackup" "work/ex/beta-1.37-6/sources/1.36.0/gh/Ralith/rackup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Ralith/rackup'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Ralith/rackup" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ralith/rackup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ralith/rackup'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c3a89aca871e1ff2be4d1c505b8a5ab29ea427dc
[INFO] sha for GitHub repo Ralith/rackup: c3a89aca871e1ff2be4d1c505b8a5ab29ea427dc
[INFO] validating manifest of Ralith/rackup on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Ralith/rackup on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Ralith/rackup
[INFO] finished frobbing Ralith/rackup
[INFO] frobbed toml for Ralith/rackup written to work/ex/beta-1.37-6/sources/1.36.0/gh/Ralith/rackup/Cargo.toml
[INFO] started frobbing Ralith/rackup
[INFO] finished frobbing Ralith/rackup
[INFO] frobbed toml for Ralith/rackup written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ralith/rackup/Cargo.toml
[INFO] crate Ralith/rackup already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Ralith/rackup against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ralith/rackup:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 58a6151f5e7c9e2cd1233a3b1d6747a9cf7585dfcc71801b9272ad9d0dcbf5fc
[INFO] running `"docker" "start" "-a" "58a6151f5e7c9e2cd1233a3b1d6747a9cf7585dfcc71801b9272ad9d0dcbf5fc"`
[INFO] [stderr]    Compiling slog v2.1.1
[INFO] [stderr]    Compiling dangerous_option v0.2.0
[INFO] [stderr]    Compiling rdedup-cdc v0.1.0
[INFO] [stderr]    Compiling two-lock-queue v0.1.1
[INFO] [stderr]    Compiling bytevec v0.2.0
[INFO] [stderr]    Compiling yapb v0.3.1
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]    Compiling zstd-sys v1.4.2+zstd.1.3.3
[INFO] [stderr]    Compiling libsodium-sys v0.0.15
[INFO] [stderr]    Compiling rust-lzma v0.2.1
[INFO] [stderr]    Compiling fs2 v0.4.2
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling base64 v0.4.2
[INFO] [stderr]    Compiling bincode v0.9.2
[INFO] [stderr]    Compiling sgdata v0.1.0 (https://github.com/dpc/rdedup.git#bb7bcf79)
[INFO] [stderr]    Compiling serde_yaml v0.6.2
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling slog-perf v0.2.0
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling crypto-mac v0.4.0
[INFO] [stderr]    Compiling digest v0.6.2
[INFO] [stderr]    Compiling block-buffer v0.2.0
[INFO] [stderr]    Compiling chrono v0.4.0
[INFO] [stderr]    Compiling sodiumoxide v0.0.15
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling blake2 v0.6.1
[INFO] [stderr]    Compiling sha2 v0.6.0
[INFO] [stderr]    Compiling bzip2 v0.3.2
[INFO] [stderr]    Compiling hyper-native-tls v0.2.4
[INFO] [stderr]    Compiling backblaze-b2 v0.1.8
[INFO] [stderr]    Compiling zstd-safe v1.4.2+zstd.1.3.3
[INFO] [stderr]    Compiling zstd v0.4.17+zstd.1.3.3
[INFO] [stderr]    Compiling rdedup-lib v3.0.0-0.1.0 (https://github.com/dpc/rdedup.git#bb7bcf79)
[INFO] [stderr]    Compiling rackup v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(integer_atomics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:34:30
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub struct PrettyErr<'a>(&'a Fail);
[INFO] [stderr]    |                              ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:38:21
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let mut x: &Fail = self.0;
[INFO] [stderr]    |                     ^^^^ help: use `dyn`: `dyn Fail`
[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 `rackup`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "58a6151f5e7c9e2cd1233a3b1d6747a9cf7585dfcc71801b9272ad9d0dcbf5fc"`
[INFO] running `"docker" "rm" "-f" "58a6151f5e7c9e2cd1233a3b1d6747a9cf7585dfcc71801b9272ad9d0dcbf5fc"`
[INFO] [stdout] 58a6151f5e7c9e2cd1233a3b1d6747a9cf7585dfcc71801b9272ad9d0dcbf5fc