Dec 04 19:39:29.704 INFO checking dowoncha/blockchain against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 19:39:29.704 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 04 19:39:30.282 INFO [stdout] 3961405838f59206c1322925eba09a5f70be618a0115e28ca07480aef864eb7a
Dec 04 19:39:30.284 INFO running `"docker" "start" "-a" "3961405838f59206c1322925eba09a5f70be618a0115e28ca07480aef864eb7a"`
Dec 04 19:39:31.771 INFO [stderr] usermod: no changes
Dec 04 19:39:31.846 INFO [stderr]     Checking blockchain v0.1.0 (/source)
Dec 04 19:39:32.555 INFO [stderr] warning: method is never used: `blocks`
Dec 04 19:39:32.555 INFO [stderr]   --> src/main.rs:82:5
Dec 04 19:39:32.555 INFO [stderr]    |
Dec 04 19:39:32.555 INFO [stderr] 82 |     pub fn blocks(&self) -> &[Block] {
Dec 04 19:39:32.555 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 19:39:32.558 INFO [stderr]    |
Dec 04 19:39:32.559 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 19:39:32.559 INFO [stderr] 
Dec 04 19:39:32.570 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 19:39:32.571 INFO [stderr]    --> src/main.rs:131:13
Dec 04 19:39:32.571 INFO [stderr]     |
Dec 04 19:39:32.571 INFO [stderr] 131 |             writeln!(f, "Block {} Hash: {}", index, block.hash());
Dec 04 19:39:32.571 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 19:39:32.571 INFO [stderr]     |
Dec 04 19:39:32.571 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 04 19:39:32.571 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 19:39:32.571 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 04 19:39:32.571 INFO [stderr] 
Dec 04 19:39:32.615 INFO [stderr] warning: method is never used: `blocks`
Dec 04 19:39:32.615 INFO [stderr]   --> src/main.rs:82:5
Dec 04 19:39:32.615 INFO [stderr]    |
Dec 04 19:39:32.615 INFO [stderr] 82 |     pub fn blocks(&self) -> &[Block] {
Dec 04 19:39:32.619 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 19:39:32.619 INFO [stderr]    |
Dec 04 19:39:32.619 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 19:39:32.619 INFO [stderr] 
Dec 04 19:39:32.635 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 19:39:32.635 INFO [stderr]    --> src/main.rs:131:13
Dec 04 19:39:32.635 INFO [stderr]     |
Dec 04 19:39:32.635 INFO [stderr] 131 |             writeln!(f, "Block {} Hash: {}", index, block.hash());
Dec 04 19:39:32.635 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 19:39:32.635 INFO [stderr]     |
Dec 04 19:39:32.635 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 04 19:39:32.635 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 19:39:32.635 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 04 19:39:32.635 INFO [stderr] 
Dec 04 19:39:32.663 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
Dec 04 19:39:32.666 INFO [stderr] su: No module specific data is present
Dec 04 19:39:33.458 INFO running `"docker" "inspect" "3961405838f59206c1322925eba09a5f70be618a0115e28ca07480aef864eb7a"`
Dec 04 19:39:33.765 INFO running `"docker" "rm" "-f" "3961405838f59206c1322925eba09a5f70be618a0115e28ca07480aef864eb7a"`
Dec 04 19:39:34.070 INFO [stdout] 3961405838f59206c1322925eba09a5f70be618a0115e28ca07480aef864eb7a