[INFO] fetching crate exonum_leveldb 0.9.1...
[INFO] testing exonum_leveldb-0.9.1 against 1.69.0 for beta-1.70-1
[INFO] extracting crate exonum_leveldb 0.9.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate exonum_leveldb 0.9.1 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exonum_leveldb 0.9.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate exonum_leveldb 0.9.1
[INFO] tweaked toml for crates.io crate exonum_leveldb 0.9.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/database.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/management.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/utils.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/snapshots.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/compaction.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/iterator.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/comparator.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/cache.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/concurrent_access.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/binary.rs
[INFO] [stderr] * /workspace/builds/worker-7-tc1/source/tests/writebatch.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ffi-opaque v2.0.1
[INFO] [stderr]   Downloaded leveldb-sys v2.0.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2d84813f705d51cdb820a69554508e3fbdb799eecfddff78579306497ec714a5
[INFO] running `Command { std: "docker" "start" "-a" "2d84813f705d51cdb820a69554508e3fbdb799eecfddff78579306497ec714a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d84813f705d51cdb820a69554508e3fbdb799eecfddff78579306497ec714a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d84813f705d51cdb820a69554508e3fbdb799eecfddff78579306497ec714a5", kill_on_drop: false }`
[INFO] [stdout] 2d84813f705d51cdb820a69554508e3fbdb799eecfddff78579306497ec714a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d8114495bc0e5ea5319f9a75775b551d5cbc70e4f788db6840e840b333658a7
[INFO] running `Command { std: "docker" "start" "-a" "2d8114495bc0e5ea5319f9a75775b551d5cbc70e4f788db6840e840b333658a7", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/tests/database.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/management.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/utils.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/snapshots.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/compaction.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/iterator.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/comparator.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/cache.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/concurrent_access.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/binary.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/writebatch.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling ffi-opaque v2.0.1
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling cmake v0.1.50
[INFO] [stderr]    Compiling leveldb-sys v2.0.9
[INFO] [stderr]    Compiling exonum_leveldb v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/database/error.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&dyn std::error::Error> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.47s
[INFO] running `Command { std: "docker" "inspect" "2d8114495bc0e5ea5319f9a75775b551d5cbc70e4f788db6840e840b333658a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d8114495bc0e5ea5319f9a75775b551d5cbc70e4f788db6840e840b333658a7", kill_on_drop: false }`
[INFO] [stdout] 2d8114495bc0e5ea5319f9a75775b551d5cbc70e4f788db6840e840b333658a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f87f516535865853487b9e85f41a39e63fea479d5d83fd38b70a76bb04a64bd1
[INFO] running `Command { std: "docker" "start" "-a" "f87f516535865853487b9e85f41a39e63fea479d5d83fd38b70a76bb04a64bd1", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/tests/database.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/management.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/utils.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/snapshots.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/compaction.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/iterator.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/comparator.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/cache.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/concurrent_access.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/binary.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/writebatch.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/database/error.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&dyn std::error::Error> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling exonum_leveldb v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/database/error.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&dyn std::error::Error> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/iterator.rs:65:22
[INFO] [stdout]    |
[INFO] [stdout] 65 |   let iterable: &mut Iterable = database;
[INFO] [stdout]    |                      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |   let iterable: &mut dyn Iterable = database;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/iterator.rs:80:22
[INFO] [stdout]    |
[INFO] [stdout] 80 |   let iterable: &mut Iterable = database;
[INFO] [stdout]    |                      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 80 |   let iterable: &mut dyn Iterable = database;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]   --> tests/concurrent_access.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     (0..10).map(|i| {
[INFO] [stdout] 18 | |          let local_db = shared.clone();
[INFO] [stdout] 19 | |
[INFO] [stdout] 20 | |          thread::spawn(move || {
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |     .map(JoinHandle::join)
[INFO] [stdout] 29 | |     .collect::<Vec<_>>();
[INFO] [stdout]    | |________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.56s
[INFO] running `Command { std: "docker" "inspect" "f87f516535865853487b9e85f41a39e63fea479d5d83fd38b70a76bb04a64bd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f87f516535865853487b9e85f41a39e63fea479d5d83fd38b70a76bb04a64bd1", kill_on_drop: false }`
[INFO] [stdout] f87f516535865853487b9e85f41a39e63fea479d5d83fd38b70a76bb04a64bd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] dac82df02be0ba5e224bc181a7ccc50fa49448e2c51dc260757eac5bf1a8e832
[INFO] running `Command { std: "docker" "start" "-a" "dac82df02be0ba5e224bc181a7ccc50fa49448e2c51dc260757eac5bf1a8e832", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/tests/database.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/management.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/utils.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/snapshots.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/compaction.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/iterator.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/comparator.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/cache.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/concurrent_access.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/binary.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/writebatch.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/database/error.rs:41:32
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn cause(&self) -> Option<&dyn std::error::Error> {
[INFO] [stderr]    |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: `exonum_leveldb` (lib) generated 1 warning (run `cargo fix --lib -p exonum_leveldb` to apply 1 suggestion)
[INFO] [stderr] warning: `exonum_leveldb` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/iterator.rs:65:22
[INFO] [stderr]    |
[INFO] [stderr] 65 |   let iterable: &mut Iterable = database;
[INFO] [stderr]    |                      ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 65 |   let iterable: &mut dyn Iterable = database;
[INFO] [stderr]    |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/iterator.rs:80:22
[INFO] [stderr]    |
[INFO] [stderr] 80 |   let iterable: &mut Iterable = database;
[INFO] [stderr]    |                      ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 80 |   let iterable: &mut dyn Iterable = database;
[INFO] [stderr]    |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `collect` that must be used
[INFO] [stderr]   --> tests/concurrent_access.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     (0..10).map(|i| {
[INFO] [stderr] 18 | |          let local_db = shared.clone();
[INFO] [stderr] 19 | |
[INFO] [stderr] 20 | |          thread::spawn(move || {
[INFO] [stderr] ...  |
[INFO] [stderr] 28 | |     .map(JoinHandle::join)
[INFO] [stderr] 29 | |     .collect::<Vec<_>>();
[INFO] [stderr]    | |________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `exonum_leveldb` (test "tests") generated 3 warnings (run `cargo fix --test "tests"` to apply 2 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/exonum_leveldb-a00c96f4afaf4998)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-df9d8075bd51d271)
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test database::test_create_options ... ok
[INFO] [stdout] test database::test_open_non_existant_database_without_create ... ok
[INFO] [stdout] test database::test_open_database ... ok
[INFO] [stdout] test binary::test_delete_from_database ... ok
[INFO] [stdout] test comparator::comparator::test_ord_comparator ... ok
[INFO] [stdout] test comparator::comparator::test_comparator ... ok
[INFO] [stdout] test binary::test_get_from_filled_database ... ok
[INFO] [stdout] test iterator::test_iterator_from_to ... ok
[INFO] [stdout] test iterator::test_key_iterator ... ok
[INFO] [stdout] test iterator::test_iterator ... ok
[INFO] [stdout] test compaction::compaction::test_iterator_from_to ... ok
[INFO] [stdout] test cache::test_open_database_with_cache ... ok
[INFO] [stdout] test iterator::test_value_iterator ... ok
[INFO] [stdout] test management::test_repair_database ... ok
[INFO] [stdout] test snapshots::test_snapshots ... ok
[INFO] [stdout] test binary::test_get_from_empty_database ... ok
[INFO] [stdout] test iterator::test_iterator_last ... ok
[INFO] [stdout] test binary::test_write_to_database ... ok
[INFO] [stdout] test writebatch::test_writebatch ... ok
[INFO] [stdout] test management::test_destroy_database ... ok
[INFO] [stdout] test snapshots::test_snapshot_iterator ... ok
[INFO] [stdout] test writebatch::test_writebatchiter ... ok
[INFO] [stdout] test concurrent_access::access_from_threads ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.13s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests exonum_leveldb
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 5) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dac82df02be0ba5e224bc181a7ccc50fa49448e2c51dc260757eac5bf1a8e832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dac82df02be0ba5e224bc181a7ccc50fa49448e2c51dc260757eac5bf1a8e832", kill_on_drop: false }`
[INFO] [stdout] dac82df02be0ba5e224bc181a7ccc50fa49448e2c51dc260757eac5bf1a8e832
