Oct 12 11:31:44.520 INFO checking uma0317/Rust-BlockChain against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 11:31:44.521 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-4/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-4/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 12 11:31:45.082 INFO blam! 2d93d055230329ca3228c4fb92748897fcf20b35f405b0b8c968d465391d3f2d
Oct 12 11:31:45.084 INFO running `"docker" "start" "-a" "2d93d055230329ca3228c4fb92748897fcf20b35f405b0b8c968d465391d3f2d"`
Oct 12 11:31:47.028 INFO kablam! usermod: no changes
Oct 12 11:31:47.128 INFO kablam!    Compiling num-traits v0.2.4
Oct 12 11:31:47.132 INFO kablam!    Compiling num-integer v0.1.38
Oct 12 11:31:47.133 INFO kablam!     Checking time v0.1.40
Oct 12 11:31:47.133 INFO kablam!     Checking rand v0.3.22
Oct 12 11:31:50.337 INFO kablam!     Checking rust-crypto v0.2.36
Oct 12 11:31:53.974 INFO kablam!     Checking chrono v0.4.2
Oct 12 11:31:59.567 INFO kablam!     Checking blockchain v0.1.0 (/source)
Oct 12 11:31:59.844 INFO kablam! warning: unused import: `Block`
Oct 12 11:31:59.845 INFO kablam!  --> src/main.rs:3:30
Oct 12 11:31:59.846 INFO kablam!   |
Oct 12 11:31:59.847 INFO kablam! 3 | use blockchain::{Blockchain, Block, Transaction};
Oct 12 11:31:59.847 INFO kablam!   |                              ^^^^^
Oct 12 11:31:59.848 INFO kablam!   |
Oct 12 11:31:59.848 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 12 11:31:59.849 INFO kablam! 
Oct 12 11:31:59.880 INFO kablam! warning: unused import: `Block`
Oct 12 11:31:59.881 INFO kablam!  --> src/main.rs:3:30
Oct 12 11:31:59.882 INFO kablam!   |
Oct 12 11:31:59.882 INFO kablam! 3 | use blockchain::{Blockchain, Block, Transaction};
Oct 12 11:31:59.883 INFO kablam!   |                              ^^^^^
Oct 12 11:31:59.884 INFO kablam!   |
Oct 12 11:31:59.884 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 12 11:31:59.885 INFO kablam! 
Oct 12 11:32:00.076 INFO kablam! warning: method is never used: `is_chain_valid`
Oct 12 11:32:00.077 INFO kablam!    --> src/blockchain.rs:164:5
Oct 12 11:32:00.078 INFO kablam!     |
Oct 12 11:32:00.079 INFO kablam! 164 |     fn is_chain_valid(&self) -> bool {
Oct 12 11:32:00.079 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 11:32:00.080 INFO kablam!     |
Oct 12 11:32:00.080 INFO kablam!     = note: #[warn(dead_code)] on by default
Oct 12 11:32:00.081 INFO kablam! 
Oct 12 11:32:00.100 INFO kablam! warning: method is never used: `is_chain_valid`
Oct 12 11:32:00.101 INFO kablam!    --> src/blockchain.rs:164:5
Oct 12 11:32:00.102 INFO kablam!     |
Oct 12 11:32:00.102 INFO kablam! 164 |     fn is_chain_valid(&self) -> bool {
Oct 12 11:32:00.103 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 11:32:00.104 INFO kablam!     |
Oct 12 11:32:00.104 INFO kablam!     = note: #[warn(dead_code)] on by default
Oct 12 11:32:00.105 INFO kablam! 
Oct 12 11:32:00.181 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 13.13s
Oct 12 11:32:00.185 INFO kablam! su: No module specific data is present
Oct 12 11:32:01.677 INFO running `"docker" "rm" "-f" "2d93d055230329ca3228c4fb92748897fcf20b35f405b0b8c968d465391d3f2d"`
Oct 12 11:32:02.016 INFO blam! 2d93d055230329ca3228c4fb92748897fcf20b35f405b0b8c968d465391d3f2d