Dec 05 10:27:58.121 INFO checking mhash-0.3.0 against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 10:27:58.121 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 10:27:58.572 INFO [stdout] 3c963b5712e3bea0385714d442ae1ebeee02f5f94b86809b3b5386ca6680d14e
Dec 05 10:27:58.574 INFO running `"docker" "start" "-a" "3c963b5712e3bea0385714d442ae1ebeee02f5f94b86809b3b5386ca6680d14e"`
Dec 05 10:28:00.307 INFO [stderr] usermod: no changes
Dec 05 10:28:00.407 INFO [stderr]     Checking varmint v0.1.3
Dec 05 10:28:00.407 INFO [stderr]     Checking backtrace v0.2.3
Dec 05 10:28:01.136 INFO [stderr]     Checking error-chain v0.5.0
Dec 05 10:28:02.047 INFO [stderr]     Checking mhash v0.3.0 (/source)
Dec 05 10:28:02.161 INFO [stderr] warning: lint `fat_ptr_transmutes` has been removed: `was accidentally removed back in 2014`
Dec 05 10:28:02.161 INFO [stderr]  --> src/lib.rs:4:9
Dec 05 10:28:02.161 INFO [stderr]   |
Dec 05 10:28:02.161 INFO [stderr] 4 | #![warn(fat_ptr_transmutes)]
Dec 05 10:28:02.161 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Dec 05 10:28:02.161 INFO [stderr]   |
Dec 05 10:28:02.161 INFO [stderr]   = note: #[warn(renamed_and_removed_lints)] on by default
Dec 05 10:28:02.161 INFO [stderr] 
Dec 05 10:28:02.164 INFO [stderr] warning: lint `fat_ptr_transmutes` has been removed: `was accidentally removed back in 2014`
Dec 05 10:28:02.164 INFO [stderr]  --> src/lib.rs:4:9
Dec 05 10:28:02.164 INFO [stderr]   |
Dec 05 10:28:02.164 INFO [stderr] 4 | #![warn(fat_ptr_transmutes)]
Dec 05 10:28:02.164 INFO [stderr]   |         ^^^^^^^^^^^^^^^^^^
Dec 05 10:28:02.164 INFO [stderr]   |
Dec 05 10:28:02.164 INFO [stderr]   = note: #[warn(renamed_and_removed_lints)] on by default
Dec 05 10:28:02.164 INFO [stderr] 
Dec 05 10:28:03.547 INFO [stderr] warning: variable does not need to be mutable
Dec 05 10:28:03.547 INFO [stderr]   --> src/multihash_vec.rs:23:17
Dec 05 10:28:03.547 INFO [stderr]    |
Dec 05 10:28:03.547 INFO [stderr] 23 |             let mut writer = &mut bytes;
Dec 05 10:28:03.547 INFO [stderr]    |                 ----^^^^^^
Dec 05 10:28:03.547 INFO [stderr]    |                 |
Dec 05 10:28:03.547 INFO [stderr]    |                 help: remove this `mut`
Dec 05 10:28:03.547 INFO [stderr]    |
Dec 05 10:28:03.547 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 10:28:03.547 INFO [stderr] 
Dec 05 10:28:03.851 INFO [stderr] warning: variable does not need to be mutable
Dec 05 10:28:03.851 INFO [stderr]   --> src/multihash_vec.rs:23:17
Dec 05 10:28:03.851 INFO [stderr]    |
Dec 05 10:28:03.851 INFO [stderr] 23 |             let mut writer = &mut bytes;
Dec 05 10:28:03.851 INFO [stderr]    |                 ----^^^^^^
Dec 05 10:28:03.851 INFO [stderr]    |                 |
Dec 05 10:28:03.851 INFO [stderr]    |                 help: remove this `mut`
Dec 05 10:28:03.851 INFO [stderr]    |
Dec 05 10:28:03.851 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 10:28:03.851 INFO [stderr] 
Dec 05 10:28:03.895 INFO [stderr] warning: unused result
Dec 05 10:28:03.895 INFO [stderr]   --> src/read.rs:83:9
Dec 05 10:28:03.895 INFO [stderr]    |
Dec 05 10:28:03.895 INFO [stderr] 83 |         buffer.read_multihash().is_err();
Dec 05 10:28:03.895 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 10:28:03.895 INFO [stderr]    |
Dec 05 10:28:03.895 INFO [stderr] note: lint level defined here
Dec 05 10:28:03.895 INFO [stderr]   --> src/lib.rs:11:9
Dec 05 10:28:03.895 INFO [stderr]    |
Dec 05 10:28:03.895 INFO [stderr] 11 | #![warn(unused_results)]
Dec 05 10:28:03.895 INFO [stderr]    |         ^^^^^^^^^^^^^^
Dec 05 10:28:03.895 INFO [stderr] 
Dec 05 10:28:03.895 INFO [stderr] warning: unused result
Dec 05 10:28:03.895 INFO [stderr]   --> src/read.rs:89:9
Dec 05 10:28:03.895 INFO [stderr]    |
Dec 05 10:28:03.895 INFO [stderr] 89 |         buffer.read_multihash().is_err();
Dec 05 10:28:03.895 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 10:28:03.895 INFO [stderr] 
Dec 05 10:28:03.895 INFO [stderr] warning: unused result
Dec 05 10:28:03.895 INFO [stderr]   --> src/read.rs:95:9
Dec 05 10:28:03.895 INFO [stderr]    |
Dec 05 10:28:03.895 INFO [stderr] 95 |         buffer.read_multihash().is_err();
Dec 05 10:28:03.895 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 10:28:03.895 INFO [stderr] 
Dec 05 10:28:03.895 INFO [stderr] warning: unused result
Dec 05 10:28:03.895 INFO [stderr]    --> src/read.rs:101:9
Dec 05 10:28:03.895 INFO [stderr]     |
Dec 05 10:28:03.895 INFO [stderr] 101 |         buffer.read_multihash().is_err();
Dec 05 10:28:03.895 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 10:28:03.895 INFO [stderr] 
Dec 05 10:28:03.895 INFO [stderr] warning: unused result
Dec 05 10:28:03.895 INFO [stderr]    --> src/read.rs:113:9
Dec 05 10:28:03.895 INFO [stderr]     |
Dec 05 10:28:03.895 INFO [stderr] 113 |         buffer.read_multihash().is_err();
Dec 05 10:28:03.895 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 10:28:03.895 INFO [stderr] 
Dec 05 10:28:03.922 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.58s
Dec 05 10:28:03.937 INFO [stderr] su: No module specific data is present
Dec 05 10:28:04.751 INFO running `"docker" "inspect" "3c963b5712e3bea0385714d442ae1ebeee02f5f94b86809b3b5386ca6680d14e"`
Dec 05 10:28:05.078 INFO running `"docker" "rm" "-f" "3c963b5712e3bea0385714d442ae1ebeee02f5f94b86809b3b5386ca6680d14e"`
Dec 05 10:28:05.399 INFO [stdout] 3c963b5712e3bea0385714d442ae1ebeee02f5f94b86809b3b5386ca6680d14e