[INFO] updating cached repository https://github.com/zesterer/funkicrab
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 98528cc593478391a0ef0f91ff533592cf263914
[INFO] testing zesterer/funkicrab against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Ffunkicrab" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zesterer/funkicrab 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 git repo https://github.com/zesterer/funkicrab
[INFO] finished tweaking git repo https://github.com/zesterer/funkicrab
[INFO] tweaked toml for git repo https://github.com/zesterer/funkicrab written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/zesterer/funkicrab already has a lockfile, it will not be regenerated
[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-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/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] bee2b2b41d4d4ce7db9dbcbfc654e25d4842acd35c52c6a3150fad392eb44df2
[INFO] running `"docker" "start" "-a" "bee2b2b41d4d4ce7db9dbcbfc654e25d4842acd35c52c6a3150fad392eb44df2"`
[INFO] [stderr]    Compiling bimap v0.1.5
[INFO] [stderr]    Compiling funkicrab v0.1.0 (/opt/rustwide/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(label_break_value)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::Error`
[INFO] [stderr]  --> src/exec.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use super::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/hir.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `iter::FromIterator`
[INFO] [stderr]  --> src/llir.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     iter::FromIterator,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/llir.rs:242:20
[INFO] [stderr]     |
[INFO] [stderr] 242 |                   if (if let CellAccessInfo::Exactly(cells) = &cell_reads {
[INFO] [stderr]     |  ____________________^
[INFO] [stderr] 243 | |                     cells.len() == 0
[INFO] [stderr] 244 | |                 } else {
[INFO] [stderr] 245 | |                     false
[INFO] [stderr] 246 | |                 }) {
[INFO] [stderr]     | |__________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 242 |                 if if let CellAccessInfo::Exactly(cells) = &cell_reads {
[INFO] [stderr] 243 |                     cells.len() == 0
[INFO] [stderr] 244 |                 } else {
[INFO] [stderr] 245 |                     false
[INFO] [stderr] 246 |                 } {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `CellAccessInfo`
[INFO] [stderr]  --> src/opt.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     CellAccessInfo,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/opt.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 65 | /     loop {
[INFO] [stderr] 66 | |         let new_prog = optimise_program(prog.clone());
[INFO] [stderr] 67 | |         if prog == new_prog {
[INFO] [stderr] 68 | |             return prog;
[INFO] [stderr] ...  |
[INFO] [stderr] 71 | |         }
[INFO] [stderr] 72 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 73 |       prog
[INFO] [stderr]    |       ^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[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 `funkicrab`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bee2b2b41d4d4ce7db9dbcbfc654e25d4842acd35c52c6a3150fad392eb44df2"`
[INFO] running `"docker" "rm" "-f" "bee2b2b41d4d4ce7db9dbcbfc654e25d4842acd35c52c6a3150fad392eb44df2"`
[INFO] [stdout] bee2b2b41d4d4ce7db9dbcbfc654e25d4842acd35c52c6a3150fad392eb44df2