[INFO] updating cached repository cbarrick/ripl
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cbarrick/ripl
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cbarrick/ripl" "work/ex/beta-1.38-1/sources/1.37.0/gh/cbarrick/ripl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cbarrick/ripl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cbarrick/ripl" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cbarrick/ripl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cbarrick/ripl'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2d4f3dac2f50942ba922259fc497cc1a14ce4d7a
[INFO] sha for GitHub repo cbarrick/ripl: 2d4f3dac2f50942ba922259fc497cc1a14ce4d7a
[INFO] validating manifest of cbarrick/ripl 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 cbarrick/ripl 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 cbarrick/ripl
[INFO] finished frobbing cbarrick/ripl
[INFO] frobbed toml for cbarrick/ripl written to work/ex/beta-1.38-1/sources/1.37.0/gh/cbarrick/ripl/Cargo.toml
[INFO] started frobbing cbarrick/ripl
[INFO] finished frobbing cbarrick/ripl
[INFO] frobbed toml for cbarrick/ripl written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cbarrick/ripl/Cargo.toml
[INFO] crate cbarrick/ripl 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cbarrick/ripl 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cbarrick/ripl:/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] 3f6edda55bda2febdcf46c45891f1a7309d8d7d3d426b5a21e3e514f7f222617
[INFO] running `"docker" "start" "-a" "3f6edda55bda2febdcf46c45891f1a7309d8d7d3d426b5a21e3e514f7f222617"`
[INFO] [stderr]    Compiling thread-id v3.0.0
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling ordered-float v0.4.0
[INFO] [stderr]    Compiling thread_local v0.3.3
[INFO] [stderr]    Compiling regex v0.2.1
[INFO] [stderr]    Compiling ripl v0.1.0-master (/opt/crater/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(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(box_syntax, box_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/syntax/error.rs:20:17
[INFO] [stderr]    |
[INFO] [stderr] 20 |     Wrapper(Box<Error + Send + Sync>),
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[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/syntax/error.rs:37:21
[INFO] [stderr]    |
[INFO] [stderr] 37 |         E: Into<Box<Error + Send + Sync>>,
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/syntax/error.rs:80:32
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/syntax/error.rs:82:15
[INFO] [stderr]    |
[INFO] [stderr] 82 |             e.cause()
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `ripl`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3f6edda55bda2febdcf46c45891f1a7309d8d7d3d426b5a21e3e514f7f222617"`
[INFO] running `"docker" "rm" "-f" "3f6edda55bda2febdcf46c45891f1a7309d8d7d3d426b5a21e3e514f7f222617"`
[INFO] [stdout] 3f6edda55bda2febdcf46c45891f1a7309d8d7d3d426b5a21e3e514f7f222617