[INFO] crate robo6502 0.3.2 is already in cache
[INFO] testing robo6502-0.3.2 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate robo6502 0.3.2 into work/builds/worker-3/source
[INFO] validating manifest of crates.io crate robo6502 0.3.2 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 robo6502 0.3.2
[INFO] finished tweaking crates.io crate robo6502 0.3.2
[INFO] tweaked toml for crates.io crate robo6502 0.3.2 written to work/builds/worker-3/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-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] f284bde55828c0f541094bdc0bf6bc915ee3b16e519ef453847cfb2850c3ce66
[INFO] running `"docker" "start" "-a" "f284bde55828c0f541094bdc0bf6bc915ee3b16e519ef453847cfb2850c3ce66"`
[INFO] [stderr]    Compiling machine_int v0.1.4
[INFO] [stderr]    Compiling robo6502 v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/cmos/ops.rs:2096:13
[INFO] [stderr]      |
[INFO] [stderr] 2096 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/cmos/ops/cycle.rs:2208:13
[INFO] [stderr]      |
[INFO] [stderr] 2208 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/nmos/ops.rs:2248:13
[INFO] [stderr]      |
[INFO] [stderr] 2248 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/nmos/ops/cycle.rs:2746:13
[INFO] [stderr]      |
[INFO] [stderr] 2746 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `"docker" "inspect" "f284bde55828c0f541094bdc0bf6bc915ee3b16e519ef453847cfb2850c3ce66"`
[INFO] running `"docker" "rm" "-f" "f284bde55828c0f541094bdc0bf6bc915ee3b16e519ef453847cfb2850c3ce66"`
[INFO] [stdout] f284bde55828c0f541094bdc0bf6bc915ee3b16e519ef453847cfb2850c3ce66
[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" "test" "--frozen" "--no-run"`
[INFO] [stdout] f243d1fcadc084b011ca55bada12a7738b3493352b10cafd1b48f7f77f298ce0
[INFO] running `"docker" "start" "-a" "f243d1fcadc084b011ca55bada12a7738b3493352b10cafd1b48f7f77f298ce0"`
[INFO] [stderr]    Compiling robo6502 v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> examples/benchmark.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_as_u128)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `robo6502`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/cmos/ops.rs:2096:13
[INFO] [stderr]      |
[INFO] [stderr] 2096 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/cmos/ops/cycle.rs:2208:13
[INFO] [stderr]      |
[INFO] [stderr] 2208 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/nmos/ops.rs:2248:13
[INFO] [stderr]      |
[INFO] [stderr] 2248 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]     --> src/nmos/ops/cycle.rs:2746:13
[INFO] [stderr]      |
[INFO] [stderr] 2746 |             _ => unreachable!(),
[INFO] [stderr]      |             ^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f243d1fcadc084b011ca55bada12a7738b3493352b10cafd1b48f7f77f298ce0"`
[INFO] running `"docker" "rm" "-f" "f243d1fcadc084b011ca55bada12a7738b3493352b10cafd1b48f7f77f298ce0"`
[INFO] [stdout] f243d1fcadc084b011ca55bada12a7738b3493352b10cafd1b48f7f77f298ce0