Nov 29 02:23:01.025 INFO checking discard-1.0.4 against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 29 02:23:01.025 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/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 +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-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"`
Nov 29 02:23:01.323 INFO [stdout] ea0d5448f0453daf059ad9265a00f0fb2f14a7b7dd667053fbefc04380fc7d75
Nov 29 02:23:01.323 INFO running `"docker" "start" "-a" "ea0d5448f0453daf059ad9265a00f0fb2f14a7b7dd667053fbefc04380fc7d75"`
Nov 29 02:23:02.120 INFO [stderr] usermod: no changes
Nov 29 02:23:02.154 INFO [stderr]     Checking discard v1.0.4 (/source)
Nov 29 02:23:02.880 INFO [stderr] warning: unused `DiscardOnDrop` that must be used
Nov 29 02:23:02.880 INFO [stderr]    --> src/lib.rs:261:9
Nov 29 02:23:02.880 INFO [stderr]     |
Nov 29 02:23:02.881 INFO [stderr] 261 |         DiscardOnDrop::new(Foo::new());
Nov 29 02:23:02.881 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 02:23:02.881 INFO [stderr]     |
Nov 29 02:23:02.881 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 29 02:23:02.881 INFO [stderr]     = note: 
Nov 29 02:23:02.881 INFO [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
Nov 29 02:23:02.881 INFO [stderr]             You probably don't want that to happen.
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]             How to fix this:
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]               * Store the DiscardOnDrop in a variable or data structure.
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
Nov 29 02:23:02.881 INFO [stderr]                 discarded (this *will* leak memory!).
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]             See the DiscardOnDrop documentation for more details.
Nov 29 02:23:02.881 INFO [stderr] 
Nov 29 02:23:02.881 INFO [stderr] warning: unused `DiscardOnDrop` that must be used
Nov 29 02:23:02.881 INFO [stderr]    --> src/lib.rs:262:9
Nov 29 02:23:02.881 INFO [stderr]     |
Nov 29 02:23:02.881 INFO [stderr] 262 |         DiscardOnDrop::new(Foo::new());
Nov 29 02:23:02.881 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 02:23:02.881 INFO [stderr]     |
Nov 29 02:23:02.881 INFO [stderr]     = note: 
Nov 29 02:23:02.881 INFO [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
Nov 29 02:23:02.881 INFO [stderr]             You probably don't want that to happen.
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]             How to fix this:
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]               * Store the DiscardOnDrop in a variable or data structure.
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
Nov 29 02:23:02.881 INFO [stderr]                 discarded (this *will* leak memory!).
Nov 29 02:23:02.881 INFO [stderr]             
Nov 29 02:23:02.881 INFO [stderr]             See the DiscardOnDrop documentation for more details.
Nov 29 02:23:02.881 INFO [stderr] 
Nov 29 02:23:02.896 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Nov 29 02:23:02.901 INFO [stderr] su: No module specific data is present
Nov 29 02:23:03.277 INFO running `"docker" "inspect" "ea0d5448f0453daf059ad9265a00f0fb2f14a7b7dd667053fbefc04380fc7d75"`
Nov 29 02:23:03.382 INFO running `"docker" "rm" "-f" "ea0d5448f0453daf059ad9265a00f0fb2f14a7b7dd667053fbefc04380fc7d75"`
Nov 29 02:23:03.676 INFO [stdout] ea0d5448f0453daf059ad9265a00f0fb2f14a7b7dd667053fbefc04380fc7d75