[INFO] crate discard 1.0.4 is already in cache
[INFO] testing discard-1.0.4 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate discard 1.0.4 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate discard 1.0.4 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate discard 1.0.4
[INFO] finished tweaking crates.io crate discard 1.0.4
[INFO] tweaked toml for crates.io crate discard 1.0.4 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 0c947585c955c1f516af9f93ca5499bf531c56af6cdd33ec284422823f721260
[INFO] running `"docker" "start" "-a" "0c947585c955c1f516af9f93ca5499bf531c56af6cdd33ec284422823f721260"`
[INFO] [stderr]    Compiling discard v1.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `"docker" "inspect" "0c947585c955c1f516af9f93ca5499bf531c56af6cdd33ec284422823f721260"`
[INFO] running `"docker" "rm" "-f" "0c947585c955c1f516af9f93ca5499bf531c56af6cdd33ec284422823f721260"`
[INFO] [stdout] 0c947585c955c1f516af9f93ca5499bf531c56af6cdd33ec284422823f721260
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3cef17fe2cb079b651f8d09fd5cbf9bdd3aa742a22edb6f2e03cd6bb11fd5fd7
[INFO] running `"docker" "start" "-a" "3cef17fe2cb079b651f8d09fd5cbf9bdd3aa742a22edb6f2e03cd6bb11fd5fd7"`
[INFO] [stderr]    Compiling discard v1.0.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `DiscardOnDrop` that must be used
[INFO] [stderr]    --> src/lib.rs:261:9
[INFO] [stderr]     |
[INFO] [stderr] 261 |         DiscardOnDrop::new(Foo::new());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: 
[INFO] [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
[INFO] [stderr]             You probably don't want that to happen.
[INFO] [stderr]             
[INFO] [stderr]             How to fix this:
[INFO] [stderr]             
[INFO] [stderr]               * Store the DiscardOnDrop in a variable or data structure.
[INFO] [stderr]             
[INFO] [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
[INFO] [stderr]                 discarded (this *will* leak memory!).
[INFO] [stderr]             
[INFO] [stderr]             See the DiscardOnDrop documentation for more details.
[INFO] [stderr] 
[INFO] [stderr] warning: unused `DiscardOnDrop` that must be used
[INFO] [stderr]    --> src/lib.rs:262:9
[INFO] [stderr]     |
[INFO] [stderr] 262 |         DiscardOnDrop::new(Foo::new());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: 
[INFO] [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
[INFO] [stderr]             You probably don't want that to happen.
[INFO] [stderr]             
[INFO] [stderr]             How to fix this:
[INFO] [stderr]             
[INFO] [stderr]               * Store the DiscardOnDrop in a variable or data structure.
[INFO] [stderr]             
[INFO] [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
[INFO] [stderr]                 discarded (this *will* leak memory!).
[INFO] [stderr]             
[INFO] [stderr]             See the DiscardOnDrop documentation for more details.
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "3cef17fe2cb079b651f8d09fd5cbf9bdd3aa742a22edb6f2e03cd6bb11fd5fd7"`
[INFO] running `"docker" "rm" "-f" "3cef17fe2cb079b651f8d09fd5cbf9bdd3aa742a22edb6f2e03cd6bb11fd5fd7"`
[INFO] [stdout] 3cef17fe2cb079b651f8d09fd5cbf9bdd3aa742a22edb6f2e03cd6bb11fd5fd7
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 84881c7f7522469a2465de27038c5b5c3d8ba83d2fe5c69c169e2f2fc4d70986
[INFO] running `"docker" "start" "-a" "84881c7f7522469a2465de27038c5b5c3d8ba83d2fe5c69c169e2f2fc4d70986"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/discard-60e2d96fa609f2ee
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::deref_mut ... ok
[INFO] [stdout] test tests::discard ... ok
[INFO] [stdout] test tests::discard_on_drop ... ok
[INFO] [stdout] test tests::leak ... ok
[INFO] [stdout] test tests::no_discard ... ok
[INFO] [stdout] test tests::unused ... ok
[INFO] [stdout] test tests::unused_discard_on_drop ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests discard
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs -  (line 15) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 30) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 61) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 3 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "84881c7f7522469a2465de27038c5b5c3d8ba83d2fe5c69c169e2f2fc4d70986"`
[INFO] running `"docker" "rm" "-f" "84881c7f7522469a2465de27038c5b5c3d8ba83d2fe5c69c169e2f2fc4d70986"`
[INFO] [stdout] 84881c7f7522469a2465de27038c5b5c3d8ba83d2fe5c69c169e2f2fc4d70986