Dec 05 00:43:28.899 INFO checking Parfyonator/merkle_tree against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 00:43:28.899 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 00:43:29.194 INFO [stdout] 17962f9be7970d39c8d3c301f74c62944e1a807fd99fadce604ebef79364e40d
Dec 05 00:43:29.194 INFO running `"docker" "start" "-a" "17962f9be7970d39c8d3c301f74c62944e1a807fd99fadce604ebef79364e40d"`
Dec 05 00:43:29.843 INFO [stderr] usermod: no changes
Dec 05 00:43:30.003 INFO [stderr]     Checking rust-crypto v0.2.36
Dec 05 00:43:35.343 INFO [stderr]     Checking merkle_tree v0.1.0 (/source)
Dec 05 00:43:36.231 INFO [stderr] warning: method is never used: `add_child`
Dec 05 00:43:36.231 INFO [stderr]   --> src/merkle_tree.rs:60:5
Dec 05 00:43:36.231 INFO [stderr]    |
Dec 05 00:43:36.231 INFO [stderr] 60 |     fn add_child(&mut self, new_val: String) -> bool {
Dec 05 00:43:36.231 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 00:43:36.231 INFO [stderr]    |
Dec 05 00:43:36.231 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 05 00:43:36.231 INFO [stderr] 
Dec 05 00:43:36.231 INFO [stderr] warning: method is never used: `has_children`
Dec 05 00:43:36.231 INFO [stderr]   --> src/merkle_tree.rs:74:5
Dec 05 00:43:36.231 INFO [stderr]    |
Dec 05 00:43:36.231 INFO [stderr] 74 |     fn has_children(&self) -> bool {
Dec 05 00:43:36.231 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 00:43:36.231 INFO [stderr] 
Dec 05 00:43:36.503 INFO [stderr] warning: method is never used: `add_child`
Dec 05 00:43:36.503 INFO [stderr]   --> src/merkle_tree.rs:60:5
Dec 05 00:43:36.503 INFO [stderr]    |
Dec 05 00:43:36.503 INFO [stderr] 60 |     fn add_child(&mut self, new_val: String) -> bool {
Dec 05 00:43:36.503 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 00:43:36.503 INFO [stderr]    |
Dec 05 00:43:36.503 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 05 00:43:36.503 INFO [stderr] 
Dec 05 00:43:36.503 INFO [stderr] warning: method is never used: `has_children`
Dec 05 00:43:36.503 INFO [stderr]   --> src/merkle_tree.rs:74:5
Dec 05 00:43:36.503 INFO [stderr]    |
Dec 05 00:43:36.503 INFO [stderr] 74 |     fn has_children(&self) -> bool {
Dec 05 00:43:36.503 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 00:43:36.503 INFO [stderr] 
Dec 05 00:43:36.518 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.65s
Dec 05 00:43:36.524 INFO [stderr] su: No module specific data is present
Dec 05 00:43:37.223 INFO running `"docker" "inspect" "17962f9be7970d39c8d3c301f74c62944e1a807fd99fadce604ebef79364e40d"`
Dec 05 00:43:37.484 INFO running `"docker" "rm" "-f" "17962f9be7970d39c8d3c301f74c62944e1a807fd99fadce604ebef79364e40d"`
Dec 05 00:43:37.788 INFO [stdout] 17962f9be7970d39c8d3c301f74c62944e1a807fd99fadce604ebef79364e40d