[INFO] fetching crate tree_decorator 0.1.2...
[INFO] testing tree_decorator-0.1.2 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate tree_decorator 0.1.2 into /workspace/builds/worker-71/source
[INFO] validating manifest of crates.io crate tree_decorator 0.1.2 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tree_decorator 0.1.2
[INFO] finished tweaking crates.io crate tree_decorator 0.1.2
[INFO] tweaked toml for crates.io crate tree_decorator 0.1.2 written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1bc33b94371f2e4810694bb4eae43415163cf4d1e14d32165e8b5e21dd89270f
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[INFO] running `Command { std: "docker" "inspect" "1bc33b94371f2e4810694bb4eae43415163cf4d1e14d32165e8b5e21dd89270f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bc33b94371f2e4810694bb4eae43415163cf4d1e14d32165e8b5e21dd89270f", kill_on_drop: false }`
[INFO] [stdout] 1bc33b94371f2e4810694bb4eae43415163cf4d1e14d32165e8b5e21dd89270f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 520e3025e843f331acf410fa6d218a8470433418945b44592a9ed1029047b006
[INFO] running `Command { std: "docker" "start" "-a" "520e3025e843f331acf410fa6d218a8470433418945b44592a9ed1029047b006", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling tree_decorator v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `style`
[INFO] [stdout]    --> src/element_handler.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub style: Style
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.55s
[INFO] running `Command { std: "docker" "inspect" "520e3025e843f331acf410fa6d218a8470433418945b44592a9ed1029047b006", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "520e3025e843f331acf410fa6d218a8470433418945b44592a9ed1029047b006", kill_on_drop: false }`
[INFO] [stdout] 520e3025e843f331acf410fa6d218a8470433418945b44592a9ed1029047b006
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dd2af512d29b4be2dc92610667c18ea989819df42d7fc1b145376a98697f308
[INFO] running `Command { std: "docker" "start" "-a" "6dd2af512d29b4be2dc92610667c18ea989819df42d7fc1b145376a98697f308", kill_on_drop: false }`
[INFO] [stderr]    Compiling num_threads v0.1.5
[INFO] [stderr]    Compiling time-macros v0.2.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stdout] warning: field is never read: `style`
[INFO] [stdout]    --> src/element_handler.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub style: Style
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling time v0.3.9
[INFO] [stderr]    Compiling simple_logger v1.16.0
[INFO] [stderr]    Compiling tree_decorator v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     tree_item!(block, "Root");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         tree_item!("Item A");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |         tree_item!("Small Description");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         tree_item!("Other Small Description");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         tree_item!(last; block, "Item B");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |             tree_item!("Item Ba");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |             tree_item!(block, "Item Bb");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |                 tree_item!(last, "Item Bba");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_items_level.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             tree_item!(last, "Item Bc");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `style`
[INFO] [stdout]    --> src/element_handler.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub style: Style
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     tree_item!(block, "Very Nested Items");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     tree_item!("A");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     tree_item!(block, "B");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         tree_item!(block; last, "B.a");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |             tree_item!("B.a.a");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             tree_item!("B.a.b");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             tree_item!("B.a.c");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             tree_item!(block, "B.a.c");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 tree_item!("B.a.c.a");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:43:17
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 tree_item!("B.a.c.b");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |                 tree_item!(last, "B.a.c.c");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             tree_item!(last, "B.a.d");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     tree_item!("C");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     tree_item!("D");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     tree_item!("E");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_multiple_nested_levels.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     tree_item!(last, "F");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     tree_item!(block, "Root");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         tree_item!(entry, "Item A");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         tree_item!(entry: Entry::None, "Small Description");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         tree_item!(dashed, "Other Small Description");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         tree_item!(last; block, "Item B");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             tree_item!("Item Ba");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             tree_item!(block, "Item Bb");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 tree_item!(last, "Item Bba");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_str` that must be used
[INFO] [stdout]   --> tests/test_output.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |             tree_item!(last, "Item Bc");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 8.59s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/tree_decorator-0e7f69a041dfb36e)
[INFO] [stderr]   Executable tests/test_items_level.rs (/opt/rustwide/target/debug/deps/test_items_level-e1cf79c82acf0e41)
[INFO] [stderr]   Executable tests/test_log.rs (/opt/rustwide/target/debug/deps/test_log-c9ade40b9be86186)
[INFO] [stderr]   Executable tests/test_multiple_nested_levels.rs (/opt/rustwide/target/debug/deps/test_multiple_nested_levels-f2992f05634367bd)
[INFO] [stderr]   Executable tests/test_no_handler_output.rs (/opt/rustwide/target/debug/deps/test_no_handler_output-f33a9ee7efd901f0)
[INFO] [stderr]   Executable tests/test_output.rs (/opt/rustwide/target/debug/deps/test_output-d58f7a833d5dc2b7)
[INFO] running `Command { std: "docker" "inspect" "6dd2af512d29b4be2dc92610667c18ea989819df42d7fc1b145376a98697f308", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dd2af512d29b4be2dc92610667c18ea989819df42d7fc1b145376a98697f308", kill_on_drop: false }`
[INFO] [stdout] 6dd2af512d29b4be2dc92610667c18ea989819df42d7fc1b145376a98697f308
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 98ea4cd1750aa02e9453e45c1682ed6a3874fb9ea673b40430806b6e167a0c62
[INFO] running `Command { std: "docker" "start" "-a" "98ea4cd1750aa02e9453e45c1682ed6a3874fb9ea673b40430806b6e167a0c62", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `style`
[INFO] [stderr]    --> src/element_handler.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub style: Style
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tree_decorator` (lib) generated 1 warning
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     tree_item!(block, "Root");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         tree_item!("Item A");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |         tree_item!("Small Description");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         tree_item!("Other Small Description");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |         tree_item!(last; block, "Item B");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |             tree_item!("Item Ba");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 |             tree_item!(block, "Item Bb");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 |                 tree_item!(last, "Item Bba");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_items_level.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |             tree_item!(last, "Item Bc");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     tree_item!(block, "Root");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         tree_item!(entry, "Item A");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         tree_item!(entry: Entry::None, "Small Description");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         tree_item!(dashed, "Other Small Description");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         tree_item!(last; block, "Item B");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |             tree_item!("Item Ba");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |             tree_item!(block, "Item Bb");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 tree_item!(last, "Item Bba");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_output.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             tree_item!(last, "Item Bc");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     tree_item!(block, "Very Nested Items");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     tree_item!("A");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     tree_item!(block, "B");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         tree_item!(block; last, "B.a");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |             tree_item!("B.a.a");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             tree_item!("B.a.b");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |             tree_item!("B.a.c");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |             tree_item!(block, "B.a.c");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 tree_item!("B.a.c.a");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 tree_item!("B.a.c.b");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |                 tree_item!(last, "B.a.c.c");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |             tree_item!(last, "B.a.d");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     tree_item!("C");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     tree_item!("D");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     tree_item!("E");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `String::as_str` that must be used
[INFO] [stderr]   --> tests/test_multiple_nested_levels.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     tree_item!(last, "F");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in the macro `tree_item` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `tree_decorator` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: `tree_decorator` (test "test_items_level") generated 9 warnings
[INFO] [stderr] warning: `tree_decorator` (test "test_output") generated 9 warnings
[INFO] [stderr] warning: `tree_decorator` (test "test_multiple_nested_levels") generated 16 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.48s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tree_decorator-0e7f69a041dfb36e)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test_items_level.rs (/opt/rustwide/target/debug/deps/test_items_level-e1cf79c82acf0e41)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running tests/test_log.rs (/opt/rustwide/target/debug/deps/test_log-c9ade40b9be86186)
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_items_level ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_output ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- test_output stdout ----
[INFO] [stdout] thread 'test_output' panicked at 'Could not determine the UTC offset on this system. Possible causes are that the time crate does not implement "local_offset_at" on your system, or that you are running in a multi-threaded environment and the time crate is returning "None" from "local_offset_at" to avoid unsafe behaviour. See the time crate's documentation for more information. (https://time-rs.github.io/internal-api/time/index.html#feature-flags): IndeterminateOffset', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/simple_logger-1.16.0/src/lib.rs:409:85
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x559b3d11d40d - std::backtrace_rs::backtrace::libunwind::trace::ha359b7f0090e2792
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x559b3d11d40d - std::backtrace_rs::backtrace::trace_unsynchronized::h0584631f25c1d70e
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x559b3d11d40d - std::sys_common::backtrace::_print_fmt::hdadffd97d279ff14
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:66:5
[INFO] [stdout]    3:     0x559b3d11d40d - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h26f189e611080a74
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:45:22
[INFO] [stdout]    4:     0x559b3d13fd9c - core::fmt::write::hfb5d11dfe037e8b7
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/fmt/mod.rs:1194:17
[INFO] [stdout]    5:     0x559b3d119dc1 - std::io::Write::write_fmt::h6a24ec64406df9e2
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/io/mod.rs:1655:15
[INFO] [stdout]    6:     0x559b3d11f155 - std::sys_common::backtrace::_print::h7a0e44402913ba60
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:48:5
[INFO] [stdout]    7:     0x559b3d11f155 - std::sys_common::backtrace::print::h9767dc455a84e728
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:35:9
[INFO] [stdout]    8:     0x559b3d11f155 - std::panicking::default_hook::{{closure}}::h60afd6c8b12988ad
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:295:22
[INFO] [stdout]    9:     0x559b3d11ee44 - std::panicking::default_hook::ha7b9bac6813f9d21
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:311:9
[INFO] [stdout]   10:     0x559b3d11f6a2 - std::panicking::rust_panic_with_hook::h7b117a162a6f8664
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:698:17
[INFO] [stdout]   11:     0x559b3d11f587 - std::panicking::begin_panic_handler::{{closure}}::h346750923c608600
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:588:13
[INFO] [stdout]   12:     0x559b3d11d8c4 - std::sys_common::backtrace::__rust_end_short_backtrace::h768c56c6a0c055c0
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:138:18
[INFO] [stdout]   13:     0x559b3d11f2b9 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:584:5
[INFO] [stdout]   14:     0x559b3d085463 - core::panicking::panic_fmt::h5c41cb2fa118fdbc
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panicking.rs:143:14
[INFO] [stdout]   15:     0x559b3d085553 - core::result::unwrap_failed::h6bc7b183ec719494
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/result.rs:1785:5
[INFO] [stdout]   16:     0x559b3d08f68e - core::result::Result<T,E>::expect::h84eca6e112e266f7
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/result.rs:1035:23
[INFO] [stdout]   17:     0x559b3d09140d - <simple_logger::SimpleLogger as log::Log>::log::h7067696097c1b158
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/simple_logger-1.16.0/src/lib.rs:409:57
[INFO] [stdout]   18:     0x559b3d0aecb4 - log::__private_api_log::he53f01ad1ba49c4c
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/log-0.4.16/src/lib.rs:1588:5
[INFO] [stdout]   19:     0x559b3d085ca2 - test_log::test_output::h300d0f49e9ed92e7
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/test_log.rs:24:5
[INFO] [stdout]   20:     0x559b3d08578a - test_log::test_output::{{closure}}::h8ccc6af9a6accbc0
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/test_log.rs:3:1
[INFO] [stdout]   21:     0x559b3d08838e - core::ops::function::FnOnce::call_once::h6eb26c42975c9b90
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   22:     0x559b3d0f9043 - core::ops::function::FnOnce::call_once::h018fc248431ce8de
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   23:     0x559b3d0f9043 - test::__rust_begin_short_backtrace::h293b982b6069d6e3
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:574:5
[INFO] [stdout]   24:     0x559b3d0f7df9 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4fc1be1a762c7a46
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/alloc/src/boxed.rs:1861:9
[INFO] [stdout]   25:     0x559b3d0f7df9 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd44623ec51b9e897
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   26:     0x559b3d0f7df9 - std::panicking::try::do_call::ha8cfa4b025f5b832
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:492:40
[INFO] [stdout]   27:     0x559b3d0f7df9 - std::panicking::try::h664f75e41c112145
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:456:19
[INFO] [stdout]   28:     0x559b3d0f7df9 - std::panic::catch_unwind::h4932ec05cd60558e
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panic.rs:137:14
[INFO] [stdout]   29:     0x559b3d0f7df9 - test::run_test_in_process::ha14a47756671755c
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:597:18
[INFO] [stdout]   30:     0x559b3d0f7df9 - test::run_test::run_test_inner::{{closure}}::h0ec9e37c8f67b62d
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:491:39
[INFO] [stdout]   31:     0x559b3d0c3fae - test::run_test::run_test_inner::{{closure}}::hd9d2e7f26d4f59e6
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:518:37
[INFO] [stdout]   32:     0x559b3d0c3fae - std::sys_common::backtrace::__rust_begin_short_backtrace::h41c0a39fac5123f8
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:122:18
[INFO] [stdout]   33:     0x559b3d0c9518 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h69a02ca0bebb6eeb
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/thread/mod.rs:498:17
[INFO] [stdout]   34:     0x559b3d0c9518 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdd05632920ce689b
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   35:     0x559b3d0c9518 - std::panicking::try::do_call::hb4947142729b90fd
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:492:40
[INFO] [stdout]   36:     0x559b3d0c9518 - std::panicking::try::h15a7e9b8394e6878
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:456:19
[INFO] [stdout]   37:     0x559b3d0c9518 - std::panic::catch_unwind::hbd3f4a3f9df49b85
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panic.rs:137:14
[INFO] [stdout]   38:     0x559b3d0c9518 - std::thread::Builder::spawn_unchecked_::{{closure}}::h880b5d5f1b9799f4
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/thread/mod.rs:497:30
[INFO] [stdout]   39:     0x559b3d0c9518 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h304d5eaf401f5061
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   40:     0x559b3d123eb3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hdba7f2afed0c35b3
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/alloc/src/boxed.rs:1861:9
[INFO] [stdout]   41:     0x559b3d123eb3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h38b0832765bf7961
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/alloc/src/boxed.rs:1861:9
[INFO] [stdout]   42:     0x559b3d123eb3 - std::sys::unix::thread::Thread::new::thread_start::h70236dc17753425e
[INFO] [stdout]                                at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7f8adb32c609 - start_thread
[INFO] [stdout]   44:     0x7f8adb0fc163 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     test_output
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--test test_log'
[INFO] running `Command { std: "docker" "inspect" "98ea4cd1750aa02e9453e45c1682ed6a3874fb9ea673b40430806b6e167a0c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98ea4cd1750aa02e9453e45c1682ed6a3874fb9ea673b40430806b6e167a0c62", kill_on_drop: false }`
[INFO] [stdout] 98ea4cd1750aa02e9453e45c1682ed6a3874fb9ea673b40430806b6e167a0c62