Nov 29 02:23:00.976 INFO checking discard-1.0.4 against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 29 02:23:00.976 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-1/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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 02:23:01.283 INFO [stdout] 337543c5ac22be02a89ec4a1326c93d6a0b1eb891ea952dcc4c918d3fd68e0a0
Nov 29 02:23:01.285 INFO running `"docker" "start" "-a" "337543c5ac22be02a89ec4a1326c93d6a0b1eb891ea952dcc4c918d3fd68e0a0"`
Nov 29 02:23:01.792 INFO [stderr] usermod: no changes
Nov 29 02:23:01.836 INFO [stderr]     Checking discard v1.0.4 (/source)
Nov 29 02:23:02.891 INFO [stderr] warning: unused `DiscardOnDrop` that must be used
Nov 29 02:23:02.891 INFO [stderr]    --> src/lib.rs:261:9
Nov 29 02:23:02.891 INFO [stderr]     |
Nov 29 02:23:02.891 INFO [stderr] 261 |         DiscardOnDrop::new(Foo::new());
Nov 29 02:23:02.891 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 02:23:02.891 INFO [stderr]     |
Nov 29 02:23:02.891 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 29 02:23:02.891 INFO [stderr]     = note: 
Nov 29 02:23:02.891 INFO [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
Nov 29 02:23:02.891 INFO [stderr]             You probably don't want that to happen.
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]             How to fix this:
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]               * Store the DiscardOnDrop in a variable or data structure.
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
Nov 29 02:23:02.891 INFO [stderr]                 discarded (this *will* leak memory!).
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]             See the DiscardOnDrop documentation for more details.
Nov 29 02:23:02.891 INFO [stderr] 
Nov 29 02:23:02.891 INFO [stderr] warning: unused `DiscardOnDrop` that must be used
Nov 29 02:23:02.891 INFO [stderr]    --> src/lib.rs:262:9
Nov 29 02:23:02.891 INFO [stderr]     |
Nov 29 02:23:02.891 INFO [stderr] 262 |         DiscardOnDrop::new(Foo::new());
Nov 29 02:23:02.891 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 02:23:02.891 INFO [stderr]     |
Nov 29 02:23:02.891 INFO [stderr]     = note: 
Nov 29 02:23:02.891 INFO [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
Nov 29 02:23:02.891 INFO [stderr]             You probably don't want that to happen.
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]             How to fix this:
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]               * Store the DiscardOnDrop in a variable or data structure.
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
Nov 29 02:23:02.891 INFO [stderr]                 discarded (this *will* leak memory!).
Nov 29 02:23:02.891 INFO [stderr]             
Nov 29 02:23:02.891 INFO [stderr]             See the DiscardOnDrop documentation for more details.
Nov 29 02:23:02.891 INFO [stderr] 
Nov 29 02:23:02.930 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
Nov 29 02:23:02.934 INFO [stderr] su: No module specific data is present
Nov 29 02:23:03.272 INFO running `"docker" "inspect" "337543c5ac22be02a89ec4a1326c93d6a0b1eb891ea952dcc4c918d3fd68e0a0"`
Nov 29 02:23:03.432 INFO running `"docker" "rm" "-f" "337543c5ac22be02a89ec4a1326c93d6a0b1eb891ea952dcc4c918d3fd68e0a0"`
Nov 29 02:23:03.646 INFO [stdout] 337543c5ac22be02a89ec4a1326c93d6a0b1eb891ea952dcc4c918d3fd68e0a0