[INFO] updating cached repository selenologist/autovaporwave
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/selenologist/autovaporwave
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/selenologist/autovaporwave" "work/ex/beta-1.38-1/sources/1.37.0/gh/selenologist/autovaporwave"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/selenologist/autovaporwave'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/selenologist/autovaporwave" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/selenologist/autovaporwave"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/selenologist/autovaporwave'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9433be2f83e4491cfbea093b0c39009989c00ad6
[INFO] sha for GitHub repo selenologist/autovaporwave: 9433be2f83e4491cfbea093b0c39009989c00ad6
[INFO] validating manifest of selenologist/autovaporwave 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 selenologist/autovaporwave 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 selenologist/autovaporwave
[INFO] finished frobbing selenologist/autovaporwave
[INFO] frobbed toml for selenologist/autovaporwave written to work/ex/beta-1.38-1/sources/1.37.0/gh/selenologist/autovaporwave/Cargo.toml
[INFO] started frobbing selenologist/autovaporwave
[INFO] finished frobbing selenologist/autovaporwave
[INFO] frobbed toml for selenologist/autovaporwave written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/selenologist/autovaporwave/Cargo.toml
[INFO] crate selenologist/autovaporwave 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 selenologist/autovaporwave 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-6/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/selenologist/autovaporwave:/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] 7dc9ae1f1e3eeb0eb846838ff4faa3beb4126dbf43394ffaee3cd98bc0e977af
[INFO] running `"docker" "start" "-a" "7dc9ae1f1e3eeb0eb846838ff4faa3beb4126dbf43394ffaee3cd98bc0e977af"`
[INFO] [stderr]    Compiling autovaporwave 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(io)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/main.rs:5:28
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, Write, Read};
[INFO] [stderr]   |                            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::io::Stdin` in the current scope
[INFO] [stderr]   --> src/main.rs:46:30
[INFO] [stderr]    |
[INFO] [stderr] 46 |     for input in io::stdin().chars(){
[INFO] [stderr]    |                              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 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 `autovaporwave`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7dc9ae1f1e3eeb0eb846838ff4faa3beb4126dbf43394ffaee3cd98bc0e977af"`
[INFO] running `"docker" "rm" "-f" "7dc9ae1f1e3eeb0eb846838ff4faa3beb4126dbf43394ffaee3cd98bc0e977af"`
[INFO] [stdout] 7dc9ae1f1e3eeb0eb846838ff4faa3beb4126dbf43394ffaee3cd98bc0e977af