[INFO] updating cached repository porglezomp/bf-arm
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/porglezomp/bf-arm
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/porglezomp/bf-arm" "work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp/bf-arm"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp/bf-arm'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/porglezomp/bf-arm" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp/bf-arm"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp/bf-arm'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 925f274188a46616d4e4351a3b043d93329b6800
[INFO] sha for GitHub repo porglezomp/bf-arm: 925f274188a46616d4e4351a3b043d93329b6800
[INFO] validating manifest of porglezomp/bf-arm 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 porglezomp/bf-arm 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 porglezomp/bf-arm
[INFO] finished frobbing porglezomp/bf-arm
[INFO] frobbed toml for porglezomp/bf-arm written to work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp/bf-arm/Cargo.toml
[INFO] started frobbing porglezomp/bf-arm
[INFO] finished frobbing porglezomp/bf-arm
[INFO] frobbed toml for porglezomp/bf-arm written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp/bf-arm/Cargo.toml
[INFO] crate porglezomp/bf-arm 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 porglezomp/bf-arm 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/porglezomp/bf-arm:/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] 3be967f55b615979de46689b51d44ef3b124738b88eadcb028c17e32a8e47b09
[INFO] running `"docker" "start" "-a" "3be967f55b615979de46689b51d44ef3b124738b88eadcb028c17e32a8e47b09"`
[INFO] [stderr]    Compiling compiler v0.1.0 (/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(io)]
[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(box_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(box_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/main.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::io::{Read, BufReader};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:128:48
[INFO] [stderr]     |
[INFO] [stderr] 128 | fn read(fname: &String) -> std::io::Result<Box<Iterator<Item=char>>> {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=char>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::io::BufReader<std::fs::File>` in the current scope
[INFO] [stderr]    --> src/main.rs:130:35
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let chars = BufReader::new(f).chars();
[INFO] [stderr]     |                                   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `compiler`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3be967f55b615979de46689b51d44ef3b124738b88eadcb028c17e32a8e47b09"`
[INFO] running `"docker" "rm" "-f" "3be967f55b615979de46689b51d44ef3b124738b88eadcb028c17e32a8e47b09"`
[INFO] [stdout] 3be967f55b615979de46689b51d44ef3b124738b88eadcb028c17e32a8e47b09