Dec 04 18:00:44.406 INFO checking grenade/rust-tutorial against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 18:00:44.407 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-1/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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 04 18:00:44.884 INFO [stdout] 1797670ed2104d66845422e8b8d906968b318b8d791aa88c6e08ac5a304d77c9
Dec 04 18:00:44.889 INFO running `"docker" "start" "-a" "1797670ed2104d66845422e8b8d906968b318b8d791aa88c6e08ac5a304d77c9"`
Dec 04 18:00:46.051 INFO [stderr] usermod: no changes
Dec 04 18:00:46.181 INFO [stderr]     Checking redisish v0.1.0 (/source/redisish)
Dec 04 18:00:46.182 INFO [stderr]     Checking tutorial v0.1.0 (/source)
Dec 04 18:00:46.182 INFO [stderr]     Checking clap v2.24.2
Dec 04 18:00:52.815 INFO [stderr]     Checking mailbox v0.1.0 (/source/mailbox)
Dec 04 18:00:53.415 INFO [stderr] warning: unused import: `Error`
Dec 04 18:00:53.415 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 04 18:00:53.415 INFO [stderr]   |
Dec 04 18:00:53.415 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 04 18:00:53.415 INFO [stderr]   |                                ^^^^^
Dec 04 18:00:53.415 INFO [stderr]   |
Dec 04 18:00:53.415 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 18:00:53.415 INFO [stderr] 
Dec 04 18:00:53.479 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 18:00:53.479 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 04 18:00:53.479 INFO [stderr]    |
Dec 04 18:00:53.479 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 04 18:00:53.479 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:00:53.479 INFO [stderr]    |
Dec 04 18:00:53.479 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 18:00:53.479 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 18:00:53.479 INFO [stderr] 
Dec 04 18:00:53.634 INFO [stderr] warning: unused import: `Error`
Dec 04 18:00:53.634 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 04 18:00:53.634 INFO [stderr]   |
Dec 04 18:00:53.634 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 04 18:00:53.634 INFO [stderr]   |                                ^^^^^
Dec 04 18:00:53.634 INFO [stderr]   |
Dec 04 18:00:53.634 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 18:00:53.634 INFO [stderr] 
Dec 04 18:00:53.727 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 18:00:53.727 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 04 18:00:53.727 INFO [stderr]    |
Dec 04 18:00:53.727 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 04 18:00:53.727 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:00:53.727 INFO [stderr]    |
Dec 04 18:00:53.727 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 18:00:53.727 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 18:00:53.727 INFO [stderr] 
Dec 04 18:00:53.759 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.68s
Dec 04 18:00:53.797 INFO [stderr] su: No module specific data is present
Dec 04 18:00:54.642 INFO running `"docker" "inspect" "1797670ed2104d66845422e8b8d906968b318b8d791aa88c6e08ac5a304d77c9"`
Dec 04 18:00:55.023 INFO running `"docker" "rm" "-f" "1797670ed2104d66845422e8b8d906968b318b8d791aa88c6e08ac5a304d77c9"`
Dec 04 18:00:55.395 INFO [stdout] 1797670ed2104d66845422e8b8d906968b318b8d791aa88c6e08ac5a304d77c9