[INFO] updating cached repository gamozolabs/slime_tree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gamozolabs/slime_tree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gamozolabs/slime_tree" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/gamozolabs/slime_tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/gamozolabs/slime_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gamozolabs/slime_tree" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/gamozolabs/slime_tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/gamozolabs/slime_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b3522d61582ee4bd0742a265b81d2b94ffcf1a6c
[INFO] sha for GitHub repo gamozolabs/slime_tree: b3522d61582ee4bd0742a265b81d2b94ffcf1a6c
[INFO] validating manifest of gamozolabs/slime_tree on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gamozolabs/slime_tree on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gamozolabs/slime_tree
[INFO] finished frobbing gamozolabs/slime_tree
[INFO] frobbed toml for gamozolabs/slime_tree written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/gamozolabs/slime_tree/Cargo.toml
[INFO] started frobbing gamozolabs/slime_tree
[INFO] finished frobbing gamozolabs/slime_tree
[INFO] frobbed toml for gamozolabs/slime_tree written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/gamozolabs/slime_tree/Cargo.toml
[INFO] crate gamozolabs/slime_tree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking gamozolabs/slime_tree against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-2/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/gamozolabs/slime_tree:/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fa52ca79adc8db8a32a1ef1529ab7182eaeb6b7656b0e79a2cce571a9cb64eaf
[INFO] running `"docker" "start" "-a" "fa52ca79adc8db8a32a1ef1529ab7182eaeb6b7656b0e79a2cce571a9cb64eaf"`
[INFO] [stderr]     Checking slime_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]   --> src/main.rs:55:53
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn worker(listing: Arc<Vec<(PathBuf, bool, bool)>>, stream: Arc<Mutex<TcpStream>>) {
[INFO] [stderr]    |                                                     ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inform_filename`
[INFO] [stderr]    --> src/main.rs:122:1
[INFO] [stderr]     |
[INFO] [stderr] 122 | fn inform_filename(handle: &Mutex<TcpStream>, filename: &str) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]   --> src/main.rs:55:53
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn worker(listing: Arc<Vec<(PathBuf, bool, bool)>>, stream: Arc<Mutex<TcpStream>>) {
[INFO] [stderr]    |                                                     ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inform_filename`
[INFO] [stderr]    --> src/main.rs:122:1
[INFO] [stderr]     |
[INFO] [stderr] 122 | fn inform_filename(handle: &Mutex<TcpStream>, filename: &str) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "fa52ca79adc8db8a32a1ef1529ab7182eaeb6b7656b0e79a2cce571a9cb64eaf"`
[INFO] running `"docker" "rm" "-f" "fa52ca79adc8db8a32a1ef1529ab7182eaeb6b7656b0e79a2cce571a9cb64eaf"`
[INFO] [stdout] fa52ca79adc8db8a32a1ef1529ab7182eaeb6b7656b0e79a2cce571a9cb64eaf