[INFO] crate robo6502 0.3.2 is already in cache
[INFO] extracting crate robo6502 0.3.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/robo6502/0.3.2
[INFO] extracting crate robo6502 0.3.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/robo6502/0.3.2
[INFO] validating manifest of robo6502-0.3.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of robo6502-0.3.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing robo6502-0.3.2
[INFO] finished frobbing robo6502-0.3.2
[INFO] frobbed toml for robo6502-0.3.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/robo6502/0.3.2/Cargo.toml
[INFO] started frobbing robo6502-0.3.2
[INFO] finished frobbing robo6502-0.3.2
[INFO] frobbed toml for robo6502-0.3.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/robo6502/0.3.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing robo6502-0.3.2 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/robo6502/0.3.2:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 9b6286cabe2e58633b59bfae6d68b7f46a866539d9e9747dd6c556542e846594
[INFO] running `"docker" "start" "-a" "9b6286cabe2e58633b59bfae6d68b7f46a866539d9e9747dd6c556542e846594"`
[INFO] [stderr]    Compiling machine_int v0.1.4
[INFO] [stderr]    Compiling robo6502 v0.3.2 (/opt/crater/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 5.33s
[INFO] running `"docker" "inspect" "9b6286cabe2e58633b59bfae6d68b7f46a866539d9e9747dd6c556542e846594"`
[INFO] running `"docker" "rm" "-f" "9b6286cabe2e58633b59bfae6d68b7f46a866539d9e9747dd6c556542e846594"`
[INFO] [stdout] 9b6286cabe2e58633b59bfae6d68b7f46a866539d9e9747dd6c556542e846594
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/robo6502/0.3.2:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 41cd4225b7cc3d7988ccc4463f55009b6c8a1003020576214ea19a56f31333e4
[INFO] running `"docker" "start" "-a" "41cd4225b7cc3d7988ccc4463f55009b6c8a1003020576214ea19a56f31333e4"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling robo6502 v0.3.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable 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" "41cd4225b7cc3d7988ccc4463f55009b6c8a1003020576214ea19a56f31333e4"`
[INFO] running `"docker" "rm" "-f" "41cd4225b7cc3d7988ccc4463f55009b6c8a1003020576214ea19a56f31333e4"`
[INFO] [stdout] 41cd4225b7cc3d7988ccc4463f55009b6c8a1003020576214ea19a56f31333e4