[INFO] updating cached repository themadprofessor/rbrainfuck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/themadprofessor/rbrainfuck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/themadprofessor/rbrainfuck" "work/ex/beta-1.38-1/sources/1.37.0/gh/themadprofessor/rbrainfuck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/themadprofessor/rbrainfuck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/themadprofessor/rbrainfuck" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/themadprofessor/rbrainfuck"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/themadprofessor/rbrainfuck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ded37c7de0945ee38c6ca4b269c2f7f525a81abe
[INFO] sha for GitHub repo themadprofessor/rbrainfuck: ded37c7de0945ee38c6ca4b269c2f7f525a81abe
[INFO] validating manifest of themadprofessor/rbrainfuck 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 themadprofessor/rbrainfuck 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 themadprofessor/rbrainfuck
[INFO] finished frobbing themadprofessor/rbrainfuck
[INFO] frobbed toml for themadprofessor/rbrainfuck written to work/ex/beta-1.38-1/sources/1.37.0/gh/themadprofessor/rbrainfuck/Cargo.toml
[INFO] started frobbing themadprofessor/rbrainfuck
[INFO] finished frobbing themadprofessor/rbrainfuck
[INFO] frobbed toml for themadprofessor/rbrainfuck written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/themadprofessor/rbrainfuck/Cargo.toml
[INFO] crate themadprofessor/rbrainfuck 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 themadprofessor/rbrainfuck 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-0/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/themadprofessor/rbrainfuck:/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] b4fcb516a648132484cb09659796f90fbe102569207338d4edd5ee34d1ddd6f7
[INFO] running `"docker" "start" "-a" "b4fcb516a648132484cb09659796f90fbe102569207338d4edd5ee34d1ddd6f7"`
[INFO] [stderr]    Compiling exit-code v1.0.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]    Compiling backtrace v0.3.2
[INFO] [stderr]    Compiling nom v3.1.0
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling rbrainfuck 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(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `nom`
[INFO] [stderr]  --> src/ast.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use nom;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / error_chain! {
[INFO] [stderr] 2  | |     foreign_links {
[INFO] [stderr] 3  | |         IoError(::std::io::Error);
[INFO] [stderr] 4  | |         NomError(::nom::simple_errors::Err);
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     }
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / error_chain! {
[INFO] [stderr] 2  | |     foreign_links {
[INFO] [stderr] 3  | |         IoError(::std::io::Error);
[INFO] [stderr] 4  | |         NomError(::nom::simple_errors::Err);
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     }
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rbrainfuck`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b4fcb516a648132484cb09659796f90fbe102569207338d4edd5ee34d1ddd6f7"`
[INFO] running `"docker" "rm" "-f" "b4fcb516a648132484cb09659796f90fbe102569207338d4edd5ee34d1ddd6f7"`
[INFO] [stdout] b4fcb516a648132484cb09659796f90fbe102569207338d4edd5ee34d1ddd6f7