Nov 05 00:43:09.981 INFO checking discard-1.0.4 against try#e740b9aa0b624fa39feb39613e76d15bdf57e594 for pr-55655 Nov 05 00:43:09.981 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55655/worker-7/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-55655/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/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 +e740b9aa0b624fa39feb39613e76d15bdf57e594-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 05 00:43:10.327 INFO blam! bf56f0915501019608b3353dd86489095529ef8ddfc46933b298b374f134b795 Nov 05 00:43:10.336 INFO running `"docker" "start" "-a" "bf56f0915501019608b3353dd86489095529ef8ddfc46933b298b374f134b795"` Nov 05 00:43:11.451 INFO kablam! usermod: no changes Nov 05 00:43:11.519 INFO kablam! Checking discard v1.0.4 (/source) Nov 05 00:43:12.783 INFO kablam! warning: unused `DiscardOnDrop` that must be used Nov 05 00:43:12.783 INFO kablam! --> src/lib.rs:261:9 Nov 05 00:43:12.783 INFO kablam! | Nov 05 00:43:12.783 INFO kablam! 261 | DiscardOnDrop::new(Foo::new()); Nov 05 00:43:12.783 INFO kablam! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Nov 05 00:43:12.783 INFO kablam! | Nov 05 00:43:12.783 INFO kablam! = note: #[warn(unused_must_use)] on by default Nov 05 00:43:12.783 INFO kablam! = note: Nov 05 00:43:12.783 INFO kablam! The DiscardOnDrop is unused, which causes it to be immediately discarded. Nov 05 00:43:12.783 INFO kablam! You probably don't want that to happen. Nov 05 00:43:12.783 INFO kablam! Nov 05 00:43:12.783 INFO kablam! How to fix this: Nov 05 00:43:12.783 INFO kablam! Nov 05 00:43:12.783 INFO kablam! * Store the DiscardOnDrop in a variable or data structure. Nov 05 00:43:12.783 INFO kablam! Nov 05 00:43:12.783 INFO kablam! * Or use the DiscardOnDrop::leak function which will cause it to not be Nov 05 00:43:12.783 INFO kablam! discarded (this *will* leak memory!). Nov 05 00:43:12.783 INFO kablam! Nov 05 00:43:12.783 INFO kablam! See the DiscardOnDrop documentation for more details. Nov 05 00:43:12.784 INFO kablam! Nov 05 00:43:12.784 INFO kablam! warning: unused `DiscardOnDrop` that must be used Nov 05 00:43:12.784 INFO kablam! --> src/lib.rs:262:9 Nov 05 00:43:12.784 INFO kablam! | Nov 05 00:43:12.784 INFO kablam! 262 | DiscardOnDrop::new(Foo::new()); Nov 05 00:43:12.784 INFO kablam! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Nov 05 00:43:12.784 INFO kablam! | Nov 05 00:43:12.784 INFO kablam! = note: Nov 05 00:43:12.784 INFO kablam! The DiscardOnDrop is unused, which causes it to be immediately discarded. Nov 05 00:43:12.784 INFO kablam! You probably don't want that to happen. Nov 05 00:43:12.784 INFO kablam! Nov 05 00:43:12.784 INFO kablam! How to fix this: Nov 05 00:43:12.784 INFO kablam! Nov 05 00:43:12.784 INFO kablam! * Store the DiscardOnDrop in a variable or data structure. Nov 05 00:43:12.784 INFO kablam! Nov 05 00:43:12.784 INFO kablam! * Or use the DiscardOnDrop::leak function which will cause it to not be Nov 05 00:43:12.784 INFO kablam! discarded (this *will* leak memory!). Nov 05 00:43:12.784 INFO kablam! Nov 05 00:43:12.784 INFO kablam! See the DiscardOnDrop documentation for more details. Nov 05 00:43:12.784 INFO kablam! Nov 05 00:43:12.799 INFO kablam! Finished dev [unoptimized + debuginfo] target(s) in 1.31s Nov 05 00:43:12.799 INFO kablam! su: No module specific data is present Nov 05 00:43:13.327 INFO running `"docker" "rm" "-f" "bf56f0915501019608b3353dd86489095529ef8ddfc46933b298b374f134b795"` Nov 05 00:43:13.627 INFO blam! bf56f0915501019608b3353dd86489095529ef8ddfc46933b298b374f134b795