Dec 19 16:23:35.281 INFO checking grenade/rust-tutorial against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:23:35.281 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/grenade/rust-tutorial:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 16:23:35.782 INFO [stdout] 03b272c39bc5a45ff7dbd89a26f1fe8aea09529d3ccbb382a30bae1869b4d6af
Dec 19 16:23:35.784 INFO running `"docker" "start" "-a" "03b272c39bc5a45ff7dbd89a26f1fe8aea09529d3ccbb382a30bae1869b4d6af"`
Dec 19 16:23:37.473 INFO [stderr]     Checking redisish v0.1.0 (/opt/crater/workdir/redisish)
Dec 19 16:23:37.473 INFO [stderr]     Checking tutorial v0.1.0 (/opt/crater/workdir)
Dec 19 16:23:37.517 INFO [stderr]     Checking clap v2.24.2
Dec 19 16:23:44.065 INFO [stderr]     Checking mailbox v0.1.0 (/opt/crater/workdir/mailbox)
Dec 19 16:23:44.396 INFO [stderr] warning: unused import: `Error`
Dec 19 16:23:44.396 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 19 16:23:44.396 INFO [stderr]   |
Dec 19 16:23:44.396 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 19 16:23:44.396 INFO [stderr]   |                                ^^^^^
Dec 19 16:23:44.396 INFO [stderr]   |
Dec 19 16:23:44.396 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:23:44.396 INFO [stderr] 
Dec 19 16:23:44.484 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 16:23:44.484 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 19 16:23:44.484 INFO [stderr]    |
Dec 19 16:23:44.484 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 19 16:23:44.484 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:23:44.484 INFO [stderr]    |
Dec 19 16:23:44.484 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 16:23:44.484 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 16:23:44.484 INFO [stderr] 
Dec 19 16:23:44.484 INFO [stderr] warning: unused import: `Error`
Dec 19 16:23:44.484 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 19 16:23:44.484 INFO [stderr]   |
Dec 19 16:23:44.484 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 19 16:23:44.484 INFO [stderr]   |                                ^^^^^
Dec 19 16:23:44.484 INFO [stderr]   |
Dec 19 16:23:44.484 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:23:44.484 INFO [stderr] 
Dec 19 16:23:44.636 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 16:23:44.636 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 19 16:23:44.636 INFO [stderr]    |
Dec 19 16:23:44.636 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 19 16:23:44.636 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:23:44.636 INFO [stderr]    |
Dec 19 16:23:44.636 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 16:23:44.636 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 16:23:44.636 INFO [stderr] 
Dec 19 16:23:44.696 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.27s
Dec 19 16:23:45.530 INFO running `"docker" "inspect" "03b272c39bc5a45ff7dbd89a26f1fe8aea09529d3ccbb382a30bae1869b4d6af"`
Dec 19 16:23:45.954 INFO running `"docker" "rm" "-f" "03b272c39bc5a45ff7dbd89a26f1fe8aea09529d3ccbb382a30bae1869b4d6af"`
Dec 19 16:23:46.276 INFO [stdout] 03b272c39bc5a45ff7dbd89a26f1fe8aea09529d3ccbb382a30bae1869b4d6af