[INFO] cloning repository RebeccaSyria/mud
[INFO] running `"git" "clone" "--bare" "git://github.com/RebeccaSyria/mud.git" "work/cache/sources/gh/RebeccaSyria/mud"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/RebeccaSyria/mud'...
[INFO] running `"git" "clone" "work/cache/sources/gh/RebeccaSyria/mud" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/RebeccaSyria/mud"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/RebeccaSyria/mud'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/RebeccaSyria/mud" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/RebeccaSyria/mud"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/RebeccaSyria/mud'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b8f2a8d5def731212f3b69b4757de84f288e685a
[INFO] sha for GitHub repo RebeccaSyria/mud: b8f2a8d5def731212f3b69b4757de84f288e685a
[INFO] validating manifest of RebeccaSyria/mud on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of RebeccaSyria/mud on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing RebeccaSyria/mud
[INFO] finished frobbing RebeccaSyria/mud
[INFO] frobbed toml for RebeccaSyria/mud written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/RebeccaSyria/mud/Cargo.toml
[INFO] started frobbing RebeccaSyria/mud
[INFO] finished frobbing RebeccaSyria/mud
[INFO] frobbed toml for RebeccaSyria/mud written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/RebeccaSyria/mud/Cargo.toml
[INFO] crate RebeccaSyria/mud has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking RebeccaSyria/mud against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-3/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/RebeccaSyria/mud:/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6cd90148f228cc01a65ca8501bf4ae4632ec29adef983f2aa67a18dd0e14524e
[INFO] running `"docker" "start" "-a" "6cd90148f228cc01a65ca8501bf4ae4632ec29adef983f2aa67a18dd0e14524e"`
[INFO] [stderr]     Checking mud v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `output` is never read
[INFO] [stderr]   --> src/main.rs:45:21
[INFO] [stderr]    |
[INFO] [stderr] 45 |             let mut output = "";
[INFO] [stderr]    |                     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `output` is never read
[INFO] [stderr]   --> src/main.rs:45:21
[INFO] [stderr]    |
[INFO] [stderr] 45 |             let mut output = "";
[INFO] [stderr]    |                     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `room_name`
[INFO] [stderr]  --> src/room.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     room_name: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `room_id`
[INFO] [stderr]  --> src/room.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     room_id: i32,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `messages`
[INFO] [stderr]  --> src/room.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     messages: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `room_name`
[INFO] [stderr]  --> src/room.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     room_name: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `room_id`
[INFO] [stderr]  --> src/room.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     room_id: i32,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `messages`
[INFO] [stderr]  --> src/room.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     messages: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "6cd90148f228cc01a65ca8501bf4ae4632ec29adef983f2aa67a18dd0e14524e"`
[INFO] running `"docker" "rm" "-f" "6cd90148f228cc01a65ca8501bf4ae4632ec29adef983f2aa67a18dd0e14524e"`
[INFO] [stdout] 6cd90148f228cc01a65ca8501bf4ae4632ec29adef983f2aa67a18dd0e14524e