Dec 19 16:23:34.015 INFO checking grenade/rust-tutorial against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 16:23:34.016 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 16:23:34.376 INFO [stdout] 8338cc928b81fa6d15f32a0769b93866c5954bd6135cb44fe5afe978e59496a4
Dec 19 16:23:34.378 INFO running `"docker" "start" "-a" "8338cc928b81fa6d15f32a0769b93866c5954bd6135cb44fe5afe978e59496a4"`
Dec 19 16:23:36.172 INFO [stderr]     Checking redisish v0.1.0 (/opt/crater/workdir/redisish)
Dec 19 16:23:36.172 INFO [stderr]     Checking tutorial v0.1.0 (/opt/crater/workdir)
Dec 19 16:23:36.220 INFO [stderr]     Checking clap v2.24.2
Dec 19 16:23:42.982 INFO [stderr]     Checking mailbox v0.1.0 (/opt/crater/workdir/mailbox)
Dec 19 16:23:43.356 INFO [stderr] warning: unused import: `Error`
Dec 19 16:23:43.357 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 19 16:23:43.357 INFO [stderr]   |
Dec 19 16:23:43.357 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 19 16:23:43.357 INFO [stderr]   |                                ^^^^^
Dec 19 16:23:43.359 INFO [stderr]   |
Dec 19 16:23:43.359 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:23:43.359 INFO [stderr] 
Dec 19 16:23:43.408 INFO [stderr] warning: unused import: `Error`
Dec 19 16:23:43.409 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 19 16:23:43.409 INFO [stderr]   |
Dec 19 16:23:43.409 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 19 16:23:43.409 INFO [stderr]   |                                ^^^^^
Dec 19 16:23:43.409 INFO [stderr]   |
Dec 19 16:23:43.409 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:23:43.409 INFO [stderr] 
Dec 19 16:23:43.464 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 16:23:43.464 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 19 16:23:43.464 INFO [stderr]    |
Dec 19 16:23:43.464 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 19 16:23:43.464 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:23:43.464 INFO [stderr]    |
Dec 19 16:23:43.464 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 16:23:43.464 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 16:23:43.464 INFO [stderr] 
Dec 19 16:23:43.624 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 16:23:43.624 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 19 16:23:43.624 INFO [stderr]    |
Dec 19 16:23:43.624 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 19 16:23:43.624 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:23:43.624 INFO [stderr]    |
Dec 19 16:23:43.624 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 16:23:43.624 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 16:23:43.624 INFO [stderr] 
Dec 19 16:23:43.662 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.57s
Dec 19 16:23:44.532 INFO running `"docker" "inspect" "8338cc928b81fa6d15f32a0769b93866c5954bd6135cb44fe5afe978e59496a4"`
Dec 19 16:23:44.858 INFO running `"docker" "rm" "-f" "8338cc928b81fa6d15f32a0769b93866c5954bd6135cb44fe5afe978e59496a4"`
Dec 19 16:23:45.120 INFO [stdout] 8338cc928b81fa6d15f32a0769b93866c5954bd6135cb44fe5afe978e59496a4