Dec 17 23:36:30.882 INFO checking grenade/rust-tutorial against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 23:36:30.882 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:36:31.083 INFO [stdout] 6655d86fbe73e7d764f59ecc9a495d22228dd17c55985a61cfb54327907c4d4d
Dec 17 23:36:31.086 INFO running `"docker" "start" "-a" "6655d86fbe73e7d764f59ecc9a495d22228dd17c55985a61cfb54327907c4d4d"`
Dec 17 23:36:32.032 INFO [stderr]     Checking redisish v0.1.0 (/opt/crater/workdir/redisish)
Dec 17 23:36:32.032 INFO [stderr]     Checking tutorial v0.1.0 (/opt/crater/workdir)
Dec 17 23:36:32.332 INFO [stderr]     Checking mailbox v0.1.0 (/opt/crater/workdir/mailbox)
Dec 17 23:36:32.612 INFO [stderr] warning: unused import: `Error`
Dec 17 23:36:32.612 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 17 23:36:32.612 INFO [stderr]   |
Dec 17 23:36:32.612 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 17 23:36:32.612 INFO [stderr]   |                                ^^^^^
Dec 17 23:36:32.612 INFO [stderr]   |
Dec 17 23:36:32.612 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 23:36:32.612 INFO [stderr] 
Dec 17 23:36:32.632 INFO [stderr] warning: unused import: `Error`
Dec 17 23:36:32.632 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 17 23:36:32.632 INFO [stderr]   |
Dec 17 23:36:32.632 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 17 23:36:32.632 INFO [stderr]   |                                ^^^^^
Dec 17 23:36:32.632 INFO [stderr]   |
Dec 17 23:36:32.632 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 23:36:32.632 INFO [stderr] 
Dec 17 23:36:32.700 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:36:32.700 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 17 23:36:32.700 INFO [stderr]    |
Dec 17 23:36:32.700 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 17 23:36:32.700 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:36:32.700 INFO [stderr]    |
Dec 17 23:36:32.700 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:36:32.700 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:36:32.700 INFO [stderr] 
Dec 17 23:36:32.709 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:36:32.709 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 17 23:36:32.709 INFO [stderr]    |
Dec 17 23:36:32.709 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 17 23:36:32.709 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:36:32.709 INFO [stderr]    |
Dec 17 23:36:32.709 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:36:32.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:36:32.709 INFO [stderr] 
Dec 17 23:36:32.729 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
Dec 17 23:36:33.162 INFO running `"docker" "inspect" "6655d86fbe73e7d764f59ecc9a495d22228dd17c55985a61cfb54327907c4d4d"`
Dec 17 23:36:33.451 INFO running `"docker" "rm" "-f" "6655d86fbe73e7d764f59ecc9a495d22228dd17c55985a61cfb54327907c4d4d"`
Dec 17 23:36:33.672 INFO [stdout] 6655d86fbe73e7d764f59ecc9a495d22228dd17c55985a61cfb54327907c4d4d