[INFO] updating cached repository cleech/adventofcode2016
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cleech/adventofcode2016
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cleech/adventofcode2016" "work/ex/beta-1.38-1/sources/1.37.0/gh/cleech/adventofcode2016"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cleech/adventofcode2016'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cleech/adventofcode2016" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cleech/adventofcode2016"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cleech/adventofcode2016'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] caab75d8a62b0f0fc1b33a91b81d1d045917d237
[INFO] sha for GitHub repo cleech/adventofcode2016: caab75d8a62b0f0fc1b33a91b81d1d045917d237
[INFO] validating manifest of cleech/adventofcode2016 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 cleech/adventofcode2016 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 cleech/adventofcode2016
[INFO] finished frobbing cleech/adventofcode2016
[INFO] frobbed toml for cleech/adventofcode2016 written to work/ex/beta-1.38-1/sources/1.37.0/gh/cleech/adventofcode2016/Cargo.toml
[INFO] started frobbing cleech/adventofcode2016
[INFO] finished frobbing cleech/adventofcode2016
[INFO] frobbed toml for cleech/adventofcode2016 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cleech/adventofcode2016/Cargo.toml
[INFO] crate cleech/adventofcode2016 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 cleech/adventofcode2016 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cleech/adventofcode2016:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] a976331fe2ee2e962d6ac83b56174f09ec3888677845cb2dd00d486efb2da899
[INFO] running `"docker" "start" "-a" "a976331fe2ee2e962d6ac83b56174f09ec3888677845cb2dd00d486efb2da899"`
[INFO] [stderr]    Compiling scan_fmt v0.1.1
[INFO] [stderr]    Compiling nom v2.0.1
[INFO] [stderr]    Compiling permutohedron v0.2.2
[INFO] [stderr]    Compiling term_size v0.2.1
[INFO] [stderr]    Compiling num_cpus v1.2.1
[INFO] [stderr]    Compiling num-complex v0.1.35
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling nodrop v0.1.8
[INFO] [stderr]    Compiling itertools v0.5.8
[INFO] [stderr]    Compiling num-bigint v0.1.35
[INFO] [stderr]    Compiling num-iter v0.1.32
[INFO] [stderr]    Compiling arrayvec v0.3.20
[INFO] [stderr]    Compiling clap v2.19.3
[INFO] [stderr]    Compiling num-rational v0.1.35
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling nalgebra v0.10.1
[INFO] [stderr]    Compiling adventofcode2016 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `to`
[INFO] [stderr]    --> src/bin/day22.rs:131:41
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn move_gap(&mut self, from: Coord, to: Coord) -> Result<usize, ()> {
[INFO] [stderr]     |                                         ^^ help: consider prefixing with an underscore: `_to`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/bin/day05.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(step_by)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/bin/day05.rs:100:17
[INFO] [stderr]     |
[INFO] [stderr] 100 |             b'0'...b'9' => Some(*self - b'0'),
[INFO] [stderr]     |                 ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/bin/day05.rs:101:17
[INFO] [stderr]     |
[INFO] [stderr] 101 |             b'a'...b'f' => Some(*self - b'a' + 10),
[INFO] [stderr]     |                 ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/bin/day05.rs:112:33
[INFO] [stderr]     |
[INFO] [stderr] 112 |     *start = (*start..).step_by(stride)
[INFO] [stderr]     |                                 ^^^^^^ expected usize, found u32
[INFO] [stderr] help: you can convert an `u32` to `usize` and panic if the converted value wouldn't fit
[INFO] [stderr]     |
[INFO] [stderr] 112 |     *start = (*start..).step_by(stride.try_into().unwrap())
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `adventofcode2016`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a976331fe2ee2e962d6ac83b56174f09ec3888677845cb2dd00d486efb2da899"`
[INFO] running `"docker" "rm" "-f" "a976331fe2ee2e962d6ac83b56174f09ec3888677845cb2dd00d486efb2da899"`
[INFO] [stdout] a976331fe2ee2e962d6ac83b56174f09ec3888677845cb2dd00d486efb2da899