Dec 17 23:36:30.864 INFO checking grenade/rust-tutorial against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 23:36:30.864 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:36:31.042 INFO [stdout] 2b75a46b0d5e437180c124365fc89c16aa98897ae8987d73ebc33ab184be9722
Dec 17 23:36:31.043 INFO running `"docker" "start" "-a" "2b75a46b0d5e437180c124365fc89c16aa98897ae8987d73ebc33ab184be9722"`
Dec 17 23:36:31.569 INFO [stderr]     Checking redisish v0.1.0 (/opt/crater/workdir/redisish)
Dec 17 23:36:31.569 INFO [stderr]     Checking tutorial v0.1.0 (/opt/crater/workdir)
Dec 17 23:36:31.814 INFO [stderr]     Checking mailbox v0.1.0 (/opt/crater/workdir/mailbox)
Dec 17 23:36:32.067 INFO [stderr] warning: unused import: `Error`
Dec 17 23:36:32.067 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 17 23:36:32.067 INFO [stderr]   |
Dec 17 23:36:32.067 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 17 23:36:32.067 INFO [stderr]   |                                ^^^^^
Dec 17 23:36:32.067 INFO [stderr]   |
Dec 17 23:36:32.067 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 23:36:32.067 INFO [stderr] 
Dec 17 23:36:32.092 INFO [stderr] warning: unused import: `Error`
Dec 17 23:36:32.092 INFO [stderr]  --> mailbox/src/main.rs:4:32
Dec 17 23:36:32.092 INFO [stderr]   |
Dec 17 23:36:32.092 INFO [stderr] 4 | use redisish::{parse, Command, Error};
Dec 17 23:36:32.092 INFO [stderr]   |                                ^^^^^
Dec 17 23:36:32.092 INFO [stderr]   |
Dec 17 23:36:32.092 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 23:36:32.092 INFO [stderr] 
Dec 17 23:36:32.156 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:36:32.156 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 17 23:36:32.156 INFO [stderr]    |
Dec 17 23:36:32.156 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 17 23:36:32.156 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:36:32.156 INFO [stderr]    |
Dec 17 23:36:32.156 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:36:32.156 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:36:32.156 INFO [stderr] 
Dec 17 23:36:32.218 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 23:36:32.218 INFO [stderr]   --> mailbox/src/main.rs:65:5
Dec 17 23:36:32.218 INFO [stderr]    |
Dec 17 23:36:32.218 INFO [stderr] 65 |     stream.read_to_string(&mut buffer);
Dec 17 23:36:32.219 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:36:32.219 INFO [stderr]    |
Dec 17 23:36:32.219 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:36:32.220 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 23:36:32.220 INFO [stderr] 
Dec 17 23:36:32.249 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
Dec 17 23:36:32.799 INFO running `"docker" "inspect" "2b75a46b0d5e437180c124365fc89c16aa98897ae8987d73ebc33ab184be9722"`
Dec 17 23:36:32.958 INFO running `"docker" "rm" "-f" "2b75a46b0d5e437180c124365fc89c16aa98897ae8987d73ebc33ab184be9722"`
Dec 17 23:36:33.153 INFO [stdout] 2b75a46b0d5e437180c124365fc89c16aa98897ae8987d73ebc33ab184be9722