[INFO] crate brainfuck 0.2.0 is already in cache
[INFO] testing brainfuck-0.2.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate brainfuck 0.2.0 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate brainfuck 0.2.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate brainfuck 0.2.0
[INFO] finished tweaking crates.io crate brainfuck 0.2.0
[INFO] tweaked toml for crates.io crate brainfuck 0.2.0 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 43f908abded4e574a65ae4d311f22ac3bc525df98d3b0ef654c8e55a3313ca45
[INFO] running `"docker" "start" "-a" "43f908abded4e574a65ae4d311f22ac3bc525df98d3b0ef654c8e55a3313ca45"`
[INFO] [stderr]    Compiling brainfuck v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | #![feature(augmented_assignments)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:80:10
[INFO] [stderr]    |
[INFO] [stderr] 80 |     eval(try!(Program::parse(source)))
[INFO] [stderr]    |          ^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: `#[warn(deprecated)]` implied by `#[warn(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:85:19
[INFO] [stderr]    |
[INFO] [stderr] 85 |     let program = try!(Program::from_file(path));
[INFO] [stderr]    |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/interpreter.rs:64:29
[INFO] [stderr]    |
[INFO] [stderr] 64 |         while let Some(r) = try!(self.step()) {
[INFO] [stderr]    |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/interpreter.rs:75:29
[INFO] [stderr]    |
[INFO] [stderr] 75 |         while let Some(r) = try!(self.step()) {
[INFO] [stderr]    |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:107:17
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 try!(self.tape.inc_ptr());
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:110:17
[INFO] [stderr]     |
[INFO] [stderr] 110 |                 try!(self.tape.dec_ptr());
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:113:17
[INFO] [stderr]     |
[INFO] [stderr] 113 |                 try!(self.tape.inc_val());
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:116:17
[INFO] [stderr]     |
[INFO] [stderr] 116 |                 try!(self.tape.dec_val());
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:120:21
[INFO] [stderr]     |
[INFO] [stderr] 120 |                     try!(w.write(&[**self.tape]));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:126:39
[INFO] [stderr]     |
[INFO] [stderr] 126 |                         **self.tape = try!(b);
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/program/mod.rs:69:24
[INFO] [stderr]    |
[INFO] [stderr] 69 |         let mut file = try!(File::open(path));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/program/mod.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         try!(file.read_to_string(&mut source));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:25:28
[INFO] [stderr]    |
[INFO] [stderr] 25 |     reader: Option<&'a mut Read>,
[INFO] [stderr]    |                            ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` implied by `#[warn(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:26:28
[INFO] [stderr]    |
[INFO] [stderr] 26 |     writer: Option<&'a mut Write>,
[INFO] [stderr]    |                            ^^^^^ help: use `dyn`: `dyn Write`
[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 `brainfuck`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "43f908abded4e574a65ae4d311f22ac3bc525df98d3b0ef654c8e55a3313ca45"`
[INFO] running `"docker" "rm" "-f" "43f908abded4e574a65ae4d311f22ac3bc525df98d3b0ef654c8e55a3313ca45"`
[INFO] [stdout] 43f908abded4e574a65ae4d311f22ac3bc525df98d3b0ef654c8e55a3313ca45