[INFO] updating cached repository porglezomp-misc/flapjack-fwop-solver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/porglezomp-misc/flapjack-fwop-solver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/porglezomp-misc/flapjack-fwop-solver" "work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp-misc/flapjack-fwop-solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp-misc/flapjack-fwop-solver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/porglezomp-misc/flapjack-fwop-solver" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp-misc/flapjack-fwop-solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp-misc/flapjack-fwop-solver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 01fe0aa72721958a406f7475f1afcba0c21feb7d
[INFO] sha for GitHub repo porglezomp-misc/flapjack-fwop-solver: 01fe0aa72721958a406f7475f1afcba0c21feb7d
[INFO] validating manifest of porglezomp-misc/flapjack-fwop-solver 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 porglezomp-misc/flapjack-fwop-solver 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 porglezomp-misc/flapjack-fwop-solver
[INFO] disabled cargo feature 'default-run' from porglezomp-misc/flapjack-fwop-solver
[INFO] finished frobbing porglezomp-misc/flapjack-fwop-solver
[INFO] frobbed toml for porglezomp-misc/flapjack-fwop-solver written to work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp-misc/flapjack-fwop-solver/Cargo.toml
[INFO] started frobbing porglezomp-misc/flapjack-fwop-solver
[INFO] disabled cargo feature 'default-run' from porglezomp-misc/flapjack-fwop-solver
[INFO] finished frobbing porglezomp-misc/flapjack-fwop-solver
[INFO] frobbed toml for porglezomp-misc/flapjack-fwop-solver written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp-misc/flapjack-fwop-solver/Cargo.toml
[INFO] crate porglezomp-misc/flapjack-fwop-solver 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 porglezomp-misc/flapjack-fwop-solver 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-3/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/porglezomp-misc/flapjack-fwop-solver:/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] f68ef9b75d154822fc7adcdd11721ef41eb5dbf7e43e66e44275b875fa38afee
[INFO] running `"docker" "start" "-a" "f68ef9b75d154822fc7adcdd11721ef41eb5dbf7e43e66e44275b875fa38afee"`
[INFO] [stderr]    Compiling fwop v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/bin/solve.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_float)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_float_secs` found for type `std::time::Duration` in the current scope
[INFO] [stderr]   --> src/bin/solve.rs:41:29
[INFO] [stderr]    |
[INFO] [stderr] 41 |         (write_end - start).as_float_secs()
[INFO] [stderr]    |                             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_float_secs` found for type `std::time::Duration` in the current scope
[INFO] [stderr]   --> src/bin/solve.rs:45:44
[INFO] [stderr]    |
[INFO] [stderr] 45 |         generate_end.duration_since(start).as_float_secs()
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_float_secs` found for type `std::time::Duration` in the current scope
[INFO] [stderr]   --> src/bin/solve.rs:49:48
[INFO] [stderr]    |
[INFO] [stderr] 49 |         write_end.duration_since(generate_end).as_float_secs()
[INFO] [stderr]    |                                                ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `fwop`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f68ef9b75d154822fc7adcdd11721ef41eb5dbf7e43e66e44275b875fa38afee"`
[INFO] running `"docker" "rm" "-f" "f68ef9b75d154822fc7adcdd11721ef41eb5dbf7e43e66e44275b875fa38afee"`
[INFO] [stdout] f68ef9b75d154822fc7adcdd11721ef41eb5dbf7e43e66e44275b875fa38afee