[INFO] updating cached repository tatref/synacor-challenge
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tatref/synacor-challenge
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tatref/synacor-challenge" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/tatref/synacor-challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/tatref/synacor-challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tatref/synacor-challenge" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/tatref/synacor-challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/tatref/synacor-challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6261bbf2ceeacf6397f12e34fd9fdf13039791f1
[INFO] sha for GitHub repo tatref/synacor-challenge: 6261bbf2ceeacf6397f12e34fd9fdf13039791f1
[INFO] validating manifest of tatref/synacor-challenge on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tatref/synacor-challenge on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tatref/synacor-challenge
[INFO] finished frobbing tatref/synacor-challenge
[INFO] frobbed toml for tatref/synacor-challenge written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/tatref/synacor-challenge/Cargo.toml
[INFO] started frobbing tatref/synacor-challenge
[INFO] finished frobbing tatref/synacor-challenge
[INFO] frobbed toml for tatref/synacor-challenge written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/tatref/synacor-challenge/Cargo.toml
[INFO] crate tatref/synacor-challenge already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] checking tatref/synacor-challenge against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-0/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/tatref/synacor-challenge:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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=forbid" "-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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e91783eff0db595228e244594b830f876c3e8ed6839058e801156b202a25b78a
[INFO] running `"docker" "start" "-a" "e91783eff0db595228e244594b830f876c3e8ed6839058e801156b202a25b78a"`
[INFO] [stderr]     Checking memchr v2.1.0
[INFO] [stderr]     Checking nix v0.11.0
[INFO] [stderr]     Checking aho-corasick v0.6.8
[INFO] [stderr]     Checking regex v1.0.5
[INFO] [stderr]     Checking rustyline v2.1.0
[INFO] [stderr]     Checking synacor-challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:37:34
[INFO] [stderr]    |
[INFO] [stderr] 37 |         vm.load_program_from_mem(program);
[INFO] [stderr]    |                                  ^^^^^^^
[INFO] [stderr]    |                                  |
[INFO] [stderr]    |                                  expected &[u16], found struct `std::vec::Vec`
[INFO] [stderr]    |                                  help: consider borrowing here: `&program`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&[u16]`
[INFO] [stderr]               found type `std::vec::Vec<{integer}>`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/main.rs:131:13
[INFO] [stderr]     |
[INFO] [stderr] 131 |             _ => unreachable!(),
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_patterns)] 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 E0308`.
[INFO] [stderr] error: Could not compile `synacor-challenge`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:684:21
[INFO] [stderr]     |
[INFO] [stderr] 684 |                     self.app.print_long_help();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e91783eff0db595228e244594b830f876c3e8ed6839058e801156b202a25b78a"`
[INFO] running `"docker" "rm" "-f" "e91783eff0db595228e244594b830f876c3e8ed6839058e801156b202a25b78a"`
[INFO] [stdout] e91783eff0db595228e244594b830f876c3e8ed6839058e801156b202a25b78a