[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-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/tatref/synacor-challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/tatref/synacor-challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tatref/synacor-challenge" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/tatref/synacor-challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/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#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tatref/synacor-challenge on toolchain try#bad365140e1e8233b42b21af70a407f14ce5fec5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-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-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/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-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/tatref/synacor-challenge/Cargo.toml
[INFO] crate tatref/synacor-challenge has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking tatref/synacor-challenge against try#bad365140e1e8233b42b21af70a407f14ce5fec5 for pr-56896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56896/worker-3/try#bad365140e1e8233b42b21af70a407f14ce5fec5:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/tatref/synacor-challenge:/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=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" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a0eaff3c72f3d7bf127ee051f51a3dc18c3215a03dd9f3fcfc9aca8c99be396b
[INFO] running `"docker" "start" "-a" "a0eaff3c72f3d7bf127ee051f51a3dc18c3215a03dd9f3fcfc9aca8c99be396b"`
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking dirs v1.0.4
[INFO] [stderr]     Checking aho-corasick v0.6.8
[INFO] [stderr]     Checking rustyline v2.1.0
[INFO] [stderr]     Checking regex v1.0.5
[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] 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: 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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a0eaff3c72f3d7bf127ee051f51a3dc18c3215a03dd9f3fcfc9aca8c99be396b"`
[INFO] running `"docker" "rm" "-f" "a0eaff3c72f3d7bf127ee051f51a3dc18c3215a03dd9f3fcfc9aca8c99be396b"`
[INFO] [stdout] a0eaff3c72f3d7bf127ee051f51a3dc18c3215a03dd9f3fcfc9aca8c99be396b