[INFO] updating cached repository thiagopnts/brainfuck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/thiagopnts/brainfuck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/thiagopnts/brainfuck" "work/ex/beta-1.38-1/sources/1.37.0/gh/thiagopnts/brainfuck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/thiagopnts/brainfuck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/thiagopnts/brainfuck" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/thiagopnts/brainfuck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/thiagopnts/brainfuck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 241d7ed64c2e5ce85a2b4d739964409f6efb8ee0
[INFO] sha for GitHub repo thiagopnts/brainfuck: 241d7ed64c2e5ce85a2b4d739964409f6efb8ee0
[INFO] validating manifest of thiagopnts/brainfuck 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 thiagopnts/brainfuck 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 thiagopnts/brainfuck
[INFO] finished frobbing thiagopnts/brainfuck
[INFO] frobbed toml for thiagopnts/brainfuck written to work/ex/beta-1.38-1/sources/1.37.0/gh/thiagopnts/brainfuck/Cargo.toml
[INFO] started frobbing thiagopnts/brainfuck
[INFO] finished frobbing thiagopnts/brainfuck
[INFO] frobbed toml for thiagopnts/brainfuck written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/thiagopnts/brainfuck/Cargo.toml
[INFO] crate thiagopnts/brainfuck 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 thiagopnts/brainfuck against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/thiagopnts/brainfuck:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] c276b998db57c1b67216fe905f59dcf8a7dcab5b8dcb3f32c5f82534e1b0f97e
[INFO] running `"docker" "start" "-a" "c276b998db57c1b67216fe905f59dcf8a7dcab5b8dcb3f32c5f82534e1b0f97e"`
[INFO] [stderr]    Compiling brainfuck v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::old_io`
[INFO] [stderr]  --> src/repl.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::old_io;
[INFO] [stderr]   |     ^^^^^^^^^^^ no `old_io` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `old_io` in `std`
[INFO] [stderr]  --> src/brainfuck.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::old_io::stdio::StdinReader;
[INFO] [stderr]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::old_io`
[INFO] [stderr]  --> src/brainfuck.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::old_io::stdin;
[INFO] [stderr]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `StdinReader` in this scope
[INFO] [stderr]   --> src/brainfuck.rs:43:29
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn new(content: Box<StdinReader>) -> Brainfuck {
[INFO] [stderr]    |                             ^^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[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(io, env)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::old_io::stdio::StdinReader`
[INFO] [stderr]  --> src/brainfuck.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::old_io::stdio::StdinReader;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0432, E0433, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: Could not compile `brainfuck`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c276b998db57c1b67216fe905f59dcf8a7dcab5b8dcb3f32c5f82534e1b0f97e"`
[INFO] running `"docker" "rm" "-f" "c276b998db57c1b67216fe905f59dcf8a7dcab5b8dcb3f32c5f82534e1b0f97e"`
[INFO] [stdout] c276b998db57c1b67216fe905f59dcf8a7dcab5b8dcb3f32c5f82534e1b0f97e