[INFO] updating cached repository michaelgruenewald/brainrust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/michaelgruenewald/brainrust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/michaelgruenewald/brainrust" "work/ex/beta-1.38-1/sources/1.37.0/gh/michaelgruenewald/brainrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/michaelgruenewald/brainrust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/michaelgruenewald/brainrust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/michaelgruenewald/brainrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/michaelgruenewald/brainrust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b8e634280bdf00b787032a2876958d119bead63
[INFO] sha for GitHub repo michaelgruenewald/brainrust: 7b8e634280bdf00b787032a2876958d119bead63
[INFO] validating manifest of michaelgruenewald/brainrust 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 michaelgruenewald/brainrust 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 michaelgruenewald/brainrust
[INFO] finished frobbing michaelgruenewald/brainrust
[INFO] frobbed toml for michaelgruenewald/brainrust written to work/ex/beta-1.38-1/sources/1.37.0/gh/michaelgruenewald/brainrust/Cargo.toml
[INFO] started frobbing michaelgruenewald/brainrust
[INFO] finished frobbing michaelgruenewald/brainrust
[INFO] frobbed toml for michaelgruenewald/brainrust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/michaelgruenewald/brainrust/Cargo.toml
[INFO] crate michaelgruenewald/brainrust 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing michaelgruenewald/brainrust 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/michaelgruenewald/brainrust:/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] 1753884b7af8e871fa4bd4337c4b5ef19d29d7c2fbfec0b8006278bff5a5b048
[INFO] running `"docker" "start" "-a" "1753884b7af8e871fa4bd4337c4b5ef19d29d7c2fbfec0b8006278bff5a5b048"`
[INFO] [stderr]    Compiling brain_rust v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(nll)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runner.rs:11:20
[INFO] [stderr]    |
[INFO] [stderr] 11 |     input: &'a mut Read,
[INFO] [stderr]    |                    ^^^^ help: use `dyn`: `dyn Read`
[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/runner.rs:12:21
[INFO] [stderr]    |
[INFO] [stderr] 12 |     output: &'a mut Write,
[INFO] [stderr]    |                     ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runner.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new<'b>(input: &'b mut Read, output: &'b mut Write) -> State<'b> {
[INFO] [stderr]    |                                   ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/runner.rs:16:57
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new<'b>(input: &'b mut Read, output: &'b mut Write) -> State<'b> {
[INFO] [stderr]    |                                                         ^^^^^ help: use `dyn`: `dyn Write`
[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 `brain_rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1753884b7af8e871fa4bd4337c4b5ef19d29d7c2fbfec0b8006278bff5a5b048"`
[INFO] running `"docker" "rm" "-f" "1753884b7af8e871fa4bd4337c4b5ef19d29d7c2fbfec0b8006278bff5a5b048"`
[INFO] [stdout] 1753884b7af8e871fa4bd4337c4b5ef19d29d7c2fbfec0b8006278bff5a5b048