Dec 11 17:48:31.137 INFO checking grenade/rust-tutorial against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 17:48:31.137 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 17:48:31.737 INFO [stdout] cb41bd922c408cbb9d1a29b4a7850b3789f37c3af8343bbd2035a81156d144b3
Dec 11 17:48:31.739 INFO running `"docker" "start" "-a" "cb41bd922c408cbb9d1a29b4a7850b3789f37c3af8343bbd2035a81156d144b3"`
Dec 11 17:48:33.340 INFO [stderr] usermod: no changes
Dec 11 17:48:33.417 INFO [stderr]     Checking redisish v0.1.0 (/source/redisish)
Dec 11 17:48:33.417 INFO [stderr]     Checking tutorial v0.1.0 (/source)
Dec 11 17:48:34.005 INFO [stderr]     Checking mailbox v0.1.0 (/source/mailbox)
Dec 11 17:48:35.284 INFO [stderr] warning: unused import: `Error`
Dec 11 17:48:35.284 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 11 17:48:35.284 INFO [stderr]   |
Dec 11 17:48:35.284 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 11 17:48:35.284 INFO [stderr]   |                                ^^^^^
Dec 11 17:48:35.284 INFO [stderr]   |
Dec 11 17:48:35.284 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 17:48:35.284 INFO [stderr] 
Dec 11 17:48:35.457 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 17:48:35.457 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 11 17:48:35.457 INFO [stderr]    |
Dec 11 17:48:35.457 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 11 17:48:35.457 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 17:48:35.457 INFO [stderr]    |
Dec 11 17:48:35.457 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 17:48:35.457 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 17:48:35.457 INFO [stderr] 
Dec 11 17:48:35.513 INFO [stderr] warning: unused import: `Error`
Dec 11 17:48:35.513 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 11 17:48:35.513 INFO [stderr]   |
Dec 11 17:48:35.513 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 11 17:48:35.513 INFO [stderr]   |                                ^^^^^
Dec 11 17:48:35.513 INFO [stderr]   |
Dec 11 17:48:35.513 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 17:48:35.513 INFO [stderr] 
Dec 11 17:48:35.588 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 17:48:35.588 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 11 17:48:35.588 INFO [stderr]    |
Dec 11 17:48:35.588 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 11 17:48:35.588 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 17:48:35.588 INFO [stderr]    |
Dec 11 17:48:35.588 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 17:48:35.588 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 17:48:35.588 INFO [stderr] 
Dec 11 17:48:35.608 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
Dec 11 17:48:35.612 INFO [stderr] su: No module specific data is present
Dec 11 17:48:36.789 INFO running `"docker" "inspect" "cb41bd922c408cbb9d1a29b4a7850b3789f37c3af8343bbd2035a81156d144b3"`
Dec 11 17:48:37.192 INFO running `"docker" "rm" "-f" "cb41bd922c408cbb9d1a29b4a7850b3789f37c3af8343bbd2035a81156d144b3"`
Dec 11 17:48:37.544 INFO [stdout] cb41bd922c408cbb9d1a29b4a7850b3789f37c3af8343bbd2035a81156d144b3