Dec 11 07:00:55.875 INFO checking uma0317/Rust-BlockChain against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 07:00:55.875 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-3/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 07:00:56.348 INFO [stdout] 3948f125eca3da66931f817f1ff14390615a4edd723780948b3ebd807bb46f64
Dec 11 07:00:56.350 INFO running `"docker" "start" "-a" "3948f125eca3da66931f817f1ff14390615a4edd723780948b3ebd807bb46f64"`
Dec 11 07:00:57.956 INFO [stderr] usermod: no changes
Dec 11 07:00:58.080 INFO [stderr]     Checking libc v0.2.41
Dec 11 07:00:58.080 INFO [stderr]    Compiling num-integer v0.1.38
Dec 11 07:01:00.597 INFO [stderr]     Checking rand v0.4.2
Dec 11 07:01:00.599 INFO [stderr]     Checking time v0.1.40
Dec 11 07:01:01.942 INFO [stderr]     Checking chrono v0.4.2
Dec 11 07:01:03.338 INFO [stderr]     Checking rand v0.3.22
Dec 11 07:01:03.686 INFO [stderr]     Checking rust-crypto v0.2.36
Dec 11 07:01:09.126 INFO [stderr]     Checking blockchain v0.1.0 (/source)
Dec 11 07:01:09.392 INFO [stderr] warning: unused import: `Block`
Dec 11 07:01:09.392 INFO [stderr]  --> src/main.rs:3:30
Dec 11 07:01:09.393 INFO [stderr]   |
Dec 11 07:01:09.393 INFO [stderr] 3 | use blockchain::{Blockchain, Block, Transaction};
Dec 11 07:01:09.393 INFO [stderr]   |                              ^^^^^
Dec 11 07:01:09.393 INFO [stderr]   |
Dec 11 07:01:09.393 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 07:01:09.393 INFO [stderr] 
Dec 11 07:01:09.486 INFO [stderr] warning: unused import: `Block`
Dec 11 07:01:09.486 INFO [stderr]  --> src/main.rs:3:30
Dec 11 07:01:09.486 INFO [stderr]   |
Dec 11 07:01:09.486 INFO [stderr] 3 | use blockchain::{Blockchain, Block, Transaction};
Dec 11 07:01:09.486 INFO [stderr]   |                              ^^^^^
Dec 11 07:01:09.486 INFO [stderr]   |
Dec 11 07:01:09.486 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 07:01:09.486 INFO [stderr] 
Dec 11 07:01:09.500 INFO [stderr] warning: method is never used: `is_chain_valid`
Dec 11 07:01:09.500 INFO [stderr]    --> src/blockchain.rs:164:5
Dec 11 07:01:09.500 INFO [stderr]     |
Dec 11 07:01:09.500 INFO [stderr] 164 |     fn is_chain_valid(&self) -> bool {
Dec 11 07:01:09.500 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 07:01:09.500 INFO [stderr]     |
Dec 11 07:01:09.500 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 11 07:01:09.500 INFO [stderr] 
Dec 11 07:01:09.724 INFO [stderr] warning: method is never used: `is_chain_valid`
Dec 11 07:01:09.724 INFO [stderr]    --> src/blockchain.rs:164:5
Dec 11 07:01:09.724 INFO [stderr]     |
Dec 11 07:01:09.724 INFO [stderr] 164 |     fn is_chain_valid(&self) -> bool {
Dec 11 07:01:09.724 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 07:01:09.724 INFO [stderr]     |
Dec 11 07:01:09.724 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 11 07:01:09.724 INFO [stderr] 
Dec 11 07:01:09.772 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.78s
Dec 11 07:01:09.776 INFO [stderr] su: No module specific data is present
Dec 11 07:01:10.986 INFO running `"docker" "inspect" "3948f125eca3da66931f817f1ff14390615a4edd723780948b3ebd807bb46f64"`
Dec 11 07:01:11.436 INFO running `"docker" "rm" "-f" "3948f125eca3da66931f817f1ff14390615a4edd723780948b3ebd807bb46f64"`
Dec 11 07:01:11.762 INFO [stdout] 3948f125eca3da66931f817f1ff14390615a4edd723780948b3ebd807bb46f64