[INFO] fetching crate widestring 0.4.3...
[INFO] testing widestring-0.4.3 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate widestring 0.4.3 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate widestring 0.4.3 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate widestring 0.4.3
[INFO] finished tweaking crates.io crate widestring 0.4.3
[INFO] tweaked toml for crates.io crate widestring 0.4.3 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03a92343de69fc8b33fc372cc8b3651723b439543ba322c6e9528c33cd3b731f
[INFO] running `Command { std: "docker" "start" "-a" "03a92343de69fc8b33fc372cc8b3651723b439543ba322c6e9528c33cd3b731f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03a92343de69fc8b33fc372cc8b3651723b439543ba322c6e9528c33cd3b731f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03a92343de69fc8b33fc372cc8b3651723b439543ba322c6e9528c33cd3b731f", kill_on_drop: false }`
[INFO] [stdout] 03a92343de69fc8b33fc372cc8b3651723b439543ba322c6e9528c33cd3b731f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6832134a274d69dcae6be65bf80b0eae3bc73dc13d4c84b9859c4e9fe941e9af
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6832134a274d69dcae6be65bf80b0eae3bc73dc13d4c84b9859c4e9fe941e9af", kill_on_drop: false }`
[INFO] [stderr]    Compiling widestring v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:784:13
[INFO] [stdout]     |
[INFO] [stdout] 784 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:184:5
[INFO] [stdout]     |
[INFO] [stdout] 184 |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` implied by `#[warn(unused)]`
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:826:13
[INFO] [stdout]     |
[INFO] [stdout] 826 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:848:13
[INFO] [stdout]     |
[INFO] [stdout] 848 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:868:13
[INFO] [stdout]     |
[INFO] [stdout] 868 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ustring.rs:402:17
[INFO] [stdout]     |
[INFO] [stdout] 402 |                 ManuallyDrop::new(chars);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "6832134a274d69dcae6be65bf80b0eae3bc73dc13d4c84b9859c4e9fe941e9af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6832134a274d69dcae6be65bf80b0eae3bc73dc13d4c84b9859c4e9fe941e9af", kill_on_drop: false }`
[INFO] [stdout] 6832134a274d69dcae6be65bf80b0eae3bc73dc13d4c84b9859c4e9fe941e9af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 196cc2b30bfa8d60205f5ae4d87f147e016790a78bbdff8cdeeab9f2a1607a88
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "196cc2b30bfa8d60205f5ae4d87f147e016790a78bbdff8cdeeab9f2a1607a88", kill_on_drop: false }`
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:784:13
[INFO] [stdout]     |
[INFO] [stdout] 784 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:184:5
[INFO] [stdout]     |
[INFO] [stdout] 184 |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` implied by `#[warn(unused)]`
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling winapi v0.3.9
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:826:13
[INFO] [stdout]     |
[INFO] [stdout] 826 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:848:13
[INFO] [stdout]     |
[INFO] [stdout] 848 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:868:13
[INFO] [stdout]     |
[INFO] [stdout] 868 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ustring.rs:402:17
[INFO] [stdout]     |
[INFO] [stdout] 402 |                 ManuallyDrop::new(chars);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling widestring v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:784:13
[INFO] [stdout]     |
[INFO] [stdout] 784 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:184:5
[INFO] [stdout]     |
[INFO] [stdout] 184 |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` implied by `#[warn(unused)]`
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:826:13
[INFO] [stdout]     |
[INFO] [stdout] 826 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:848:13
[INFO] [stdout]     |
[INFO] [stdout] 848 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ucstring.rs:868:13
[INFO] [stdout]     |
[INFO] [stdout] 868 |             ManuallyDrop::new(chars);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/ustring.rs:402:17
[INFO] [stdout]     |
[INFO] [stdout] 402 |                 ManuallyDrop::new(chars);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `Command { std: "docker" "inspect" "196cc2b30bfa8d60205f5ae4d87f147e016790a78bbdff8cdeeab9f2a1607a88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "196cc2b30bfa8d60205f5ae4d87f147e016790a78bbdff8cdeeab9f2a1607a88", kill_on_drop: false }`
[INFO] [stdout] 196cc2b30bfa8d60205f5ae4d87f147e016790a78bbdff8cdeeab9f2a1607a88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9135a57097e9595150be79e988e49d2a74d922aeaafdf9d924a91720bd70fdb7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9135a57097e9595150be79e988e49d2a74d922aeaafdf9d924a91720bd70fdb7", kill_on_drop: false }`
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:784:13
[INFO] [stderr]     |
[INFO] [stderr] 784 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/lib.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     unused,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` implied by `#[warn(unused)]`
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:826:13
[INFO] [stderr]     |
[INFO] [stderr] 826 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:848:13
[INFO] [stderr]     |
[INFO] [stderr] 848 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:868:13
[INFO] [stderr]     |
[INFO] [stderr] 868 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ustring.rs:402:17
[INFO] [stderr]     |
[INFO] [stderr] 402 |                 ManuallyDrop::new(chars);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:784:13
[INFO] [stderr]     |
[INFO] [stderr] 784 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/lib.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     unused,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` implied by `#[warn(unused)]`
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:826:13
[INFO] [stderr]     |
[INFO] [stderr] 826 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:848:13
[INFO] [stderr]     |
[INFO] [stderr] 848 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ucstring.rs:868:13
[INFO] [stderr]     |
[INFO] [stderr] 868 |             ManuallyDrop::new(chars);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stderr]    --> src/ustring.rs:402:17
[INFO] [stderr]     |
[INFO] [stderr] 402 |                 ManuallyDrop::new(chars);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/widestring-b7086ec7b346139c
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests widestring
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 83 tests
[INFO] [stdout] test src/lib.rs - (line 96) ... ok
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<u32>::to_string (line 478) ... FAILED
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<C>::into_ucstring (line 260) ... FAILED
[INFO] [stdout] test src/ucstring.rs - ucstring::U16CString (line 1532) ... FAILED
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString (line 42) ... FAILED
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<u16>::to_os_string (line 301) ... FAILED
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString (line 54) ... FAILED
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<u16>::to_string (line 325) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 140) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::U32CString (line 1558) ... ok
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<u32>::to_os_string (line 454) ... ok
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<u16>::to_string_lossy (line 346) ... ok
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<C>::to_ustring (line 208) ... ok
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<C>::into_ucstring (line 269) ... ok
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<u32>::to_string_lossy (line 499) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::from_vec_with_nul (line 155) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::from_vec_with_nul (line 146) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::new (line 97) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::into_boxed_ucstr (line 367) ... ok
[INFO] [stdout] test src/ucstr.rs - ucstr::UCStr<C>::to_ustring (line 194) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::from_vec_with_nul (line 166) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::new (line 117) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::from_vec_with_nul (line 174) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::new (line 88) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::new (line 108) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<C>::into_boxed_ucstr (line 377) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_os_str_with_nul (line 696) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_os_str_unchecked (line 671) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_str_with_nul (line 471) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_os_str_with_nul (line 706) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_os_str (line 636) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_str_unchecked (line 448) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_os_str (line 646) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_str (line 424) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_str (line 414) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_str_with_nul (line 481) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_str_with_nul_unchecked (line 504) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u16>::from_os_str_with_nul_unchecked (line 732) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_chars_with_nul (line 813) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_os_str (line 1206) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_chars (line 770) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_str (line 885) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_os_str_with_nul (line 1256) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_os_str_unchecked (line 1231) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_os_str (line 1196) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_chars (line 759) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_chars_with_nul (line 802) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_str_with_nul_unchecked (line 975) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_str (line 895) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_os_str_with_nul (line 1266) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_os_str_with_nul_unchecked (line 1292) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_str_unchecked (line 919) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_str_with_nul (line 952) ... ok
[INFO] [stdout] test src/ucstring.rs - ucstring::UCString<u32>::from_str_with_nul (line 942) ... ok
[INFO] [stdout] test src/ustr.rs - ustr::UStr<u16>::to_string (line 166) ... ok
[INFO] [stdout] test src/ustr.rs - ustr::UStr<u16>::to_string_lossy (line 187) ... ok
[INFO] [stdout] test src/ustr.rs - ustr::UStr<u32>::to_os_string (line 242) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString (line 45) ... ok
[INFO] [stdout] test src/ustr.rs - ustr::UStr<u16>::to_os_string (line 142) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::U16String (line 745) ... ok
[INFO] [stdout] test src/ustr.rs - ustr::UStr<u32>::to_string_lossy (line 299) ... ok
[INFO] [stdout] test src/ustr.rs - ustr::UStr<u32>::to_string (line 266) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString (line 57) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::push_slice (line 212) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::into_boxed_ustr (line 272) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::push (line 180) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::shrink_to_fit (line 241) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::U32String (line 773) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::into_boxed_ustr (line 280) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::from_vec (line 84) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::from_vec (line 93) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u32>::from_os_str (line 436) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::push_slice (line 223) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::shrink_to_fit (line 253) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u16>::push_str (line 345) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<C>::push (line 191) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u32>::from_str (line 415) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u16>::from_os_str (line 323) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u16>::from_str (line 301) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u32>::from_chars (line 387) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u16>::push_os_str (line 365) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u32>::push_os_str (line 493) ... ok
[INFO] [stdout] test src/ustring.rs - ustring::UString<u32>::push_str (line 473) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/ucstr.rs - ucstr::UCStr<u32>::to_string (line 478) stdout ----
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ucstr.rs - ucstr::UCStr<C>::into_ucstring (line 260) stdout ----
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ucstring.rs - ucstring::U16CString (line 1532) stdout ----
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ucstring.rs - ucstring::UCString (line 42) stdout ----
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ucstr.rs - ucstr::UCStr<u16>::to_os_string (line 301) stdout ----
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ucstring.rs - ucstring::UCString (line 54) stdout ----
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ucstr.rs - ucstr::UCStr<u16>::to_string (line 325) stdout ----
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/ucstr.rs - ucstr::UCStr<C>::into_ucstring (line 260)
[INFO] [stdout]     src/ucstr.rs - ucstr::UCStr<u16>::to_os_string (line 301)
[INFO] [stdout]     src/ucstr.rs - ucstr::UCStr<u16>::to_string (line 325)
[INFO] [stdout]     src/ucstr.rs - ucstr::UCStr<u32>::to_string (line 478)
[INFO] [stdout]     src/ucstring.rs - ucstring::U16CString (line 1532)
[INFO] [stdout]     src/ucstring.rs - ucstring::UCString (line 42)
[INFO] [stdout]     src/ucstring.rs - ucstring::UCString (line 54)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 76 passed; 7 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "9135a57097e9595150be79e988e49d2a74d922aeaafdf9d924a91720bd70fdb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9135a57097e9595150be79e988e49d2a74d922aeaafdf9d924a91720bd70fdb7", kill_on_drop: false }`
[INFO] [stdout] 9135a57097e9595150be79e988e49d2a74d922aeaafdf9d924a91720bd70fdb7
