[INFO] fetching crate derail 0.1.0...
[INFO] testing derail-0.1.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate derail 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate derail 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate derail 0.1.0
[INFO] tweaked toml for crates.io crate derail 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate derail 0.1.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate derail 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded similar-asserts v1.6.1
[INFO] [stderr]   Downloaded derail-macros v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a26766119a7475aae8151c2e1a3f7d4b099342b0363f4b9eb056a354172c3d17
[INFO] running `Command { std: "docker" "start" "-a" "a26766119a7475aae8151c2e1a3f7d4b099342b0363f4b9eb056a354172c3d17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a26766119a7475aae8151c2e1a3f7d4b099342b0363f4b9eb056a354172c3d17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a26766119a7475aae8151c2e1a3f7d4b099342b0363f4b9eb056a354172c3d17", kill_on_drop: false }`
[INFO] [stdout] a26766119a7475aae8151c2e1a3f7d4b099342b0363f4b9eb056a354172c3d17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] cbd434dece9c7f802f1322b692256f294f04e09d47369a202e058961999ff205
[INFO] running `Command { std: "docker" "start" "-a" "cbd434dece9c7f802f1322b692256f294f04e09d47369a202e058961999ff205", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling derail-macros v0.1.0
[INFO] [stderr]    Compiling derail v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/error/ext.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         visitor.visit_many(iter::once(self));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let _ = visitor.visit_many(iter::once(self));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/report/multiline.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/report/oneline.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.14s
[INFO] running `Command { std: "docker" "inspect" "cbd434dece9c7f802f1322b692256f294f04e09d47369a202e058961999ff205", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbd434dece9c7f802f1322b692256f294f04e09d47369a202e058961999ff205", kill_on_drop: false }`
[INFO] [stdout] cbd434dece9c7f802f1322b692256f294f04e09d47369a202e058961999ff205
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 0a8e44f4830fa0af44d079cfd6c6cef42f1f2214b2156ada5aadc375314599d0
[INFO] running `Command { std: "docker" "start" "-a" "0a8e44f4830fa0af44d079cfd6c6cef42f1f2214b2156ada5aadc375314599d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling indoc v2.0.5
[INFO] [stderr]    Compiling console v0.15.10
[INFO] [stderr]    Compiling similar v2.7.0
[INFO] [stderr]    Compiling similar-asserts v1.6.1
[INFO] [stderr]    Compiling pin-project-internal v1.1.9
[INFO] [stderr]    Compiling derail-macros v0.1.0
[INFO] [stderr]    Compiling derail v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/error/ext.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         visitor.visit_many(iter::once(self));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let _ = visitor.visit_many(iter::once(self));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/report/multiline.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/report/oneline.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pin-project v1.1.9
[INFO] [stderr]    Compiling insta v1.42.1
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/error/ext.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         visitor.visit_many(iter::once(self));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let _ = visitor.visit_many(iter::once(self));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/report/multiline.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> src/report/oneline.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]   --> tests/integrations/error.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 |     visitor.visit_many(iter::once(&error));
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let _ = visitor.visit_many(iter::once(&error));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]    --> tests/integrations/error.rs:106:5
[INFO] [stdout]     |
[INFO] [stdout] 106 |     visitor.visit_many(iter::once(&error));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let _ = visitor.visit_many(iter::once(&error));
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]    --> tests/integrations/error.rs:139:5
[INFO] [stdout]     |
[INFO] [stdout] 139 |     visitor.visit_children_of(error);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 139 |     let _ = visitor.visit_children_of(error);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]    --> tests/integrations/error.rs:179:5
[INFO] [stdout]     |
[INFO] [stdout] 179 |     visitor.visit_many(&errors);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 179 |     let _ = visitor.visit_many(&errors);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `ControlFlow` that must be used
[INFO] [stdout]    --> tests/integrations/error.rs:239:5
[INFO] [stdout]     |
[INFO] [stdout] 239 |     visitor.visit_many(iter::once(&error));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 239 |     let _ = visitor.visit_many(iter::once(&error));
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 14.99s
[INFO] running `Command { std: "docker" "inspect" "0a8e44f4830fa0af44d079cfd6c6cef42f1f2214b2156ada5aadc375314599d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a8e44f4830fa0af44d079cfd6c6cef42f1f2214b2156ada5aadc375314599d0", kill_on_drop: false }`
[INFO] [stdout] 0a8e44f4830fa0af44d079cfd6c6cef42f1f2214b2156ada5aadc375314599d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] b77d83763c1eb870b9de4d7177887674902b8a6f8c383dadbb68fa07304ef71e
[INFO] running `Command { std: "docker" "start" "-a" "b77d83763c1eb870b9de4d7177887674902b8a6f8c383dadbb68fa07304ef71e", kill_on_drop: false }`
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]   --> src/error/ext.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         visitor.visit_many(iter::once(self));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let _ = visitor.visit_many(iter::once(self));
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]   --> src/report/multiline.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         visitor.visit_many(self.0.clone());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]   --> src/report/oneline.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |         visitor.visit_many(self.0.clone());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 64 |         let _ = visitor.visit_many(self.0.clone());
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `derail` (lib) generated 3 warnings
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]   --> tests/integrations/error.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     visitor.visit_many(iter::once(&error));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 82 |     let _ = visitor.visit_many(iter::once(&error));
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]    --> tests/integrations/error.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     visitor.visit_many(iter::once(&error));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 106 |     let _ = visitor.visit_many(iter::once(&error));
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]    --> tests/integrations/error.rs:139:5
[INFO] [stderr]     |
[INFO] [stderr] 139 |     visitor.visit_children_of(error);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 139 |     let _ = visitor.visit_children_of(error);
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]    --> tests/integrations/error.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     visitor.visit_many(&errors);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 179 |     let _ = visitor.visit_many(&errors);
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `ControlFlow` that must be used
[INFO] [stderr]    --> tests/integrations/error.rs:239:5
[INFO] [stderr]     |
[INFO] [stderr] 239 |     visitor.visit_many(iter::once(&error));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 239 |     let _ = visitor.visit_many(iter::once(&error));
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `derail` (test "integrations") generated 5 warnings
[INFO] [stderr] warning: `derail` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/derail-0e0c01c7b6d1b256)
[INFO] [stderr]      Running tests/integrations/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/integrations-4d3048e0b3e4ad00)
[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] [stdout] 
[INFO] [stdout] running 26 tests
[INFO] [stdout] test error::impls_alloc::rc_impl ... ok
[INFO] [stdout] test error::impls_alloc::box_impl ... ok
[INFO] [stdout] test error::impls_alloc::arc_impl ... ok
[INFO] [stdout] test error::dyn_safe ... ok
[INFO] [stdout] test error::impls_core::mut_impl ... ok
[INFO] [stdout] test error::from_core ... ok
[INFO] [stdout] test error::impls_core::ref_impl ... ok
[INFO] [stdout] test error::one_many_many_no_ascending ... ok
[INFO] [stdout] test error::one_many_many_children ... ok
[INFO] [stdout] test error::one_many_many ... ok
[INFO] [stdout] test error::many_one ... ok
[INFO] [stdout] test report::multiline::convoluted_exact_depth ... ok
[INFO] [stdout] test report::multiline::convoluted_undersized_depth ... ok
[INFO] [stdout] test report::multiline::simpler_exact_depth ... ok
[INFO] [stdout] test report::oneline::convoluted_exact_depth ... ok
[INFO] [stdout] test report::multiline::simpler_heap ... ok
[INFO] [stdout] test report::multiline::simpler_undersized_depth ... ok
[INFO] [stdout] test report::multiline::convoluted_heap ... ok
[INFO] [stdout] test report::oneline::convoluted_heap ... ok
[INFO] [stdout] test report::oneline::convoluted_undersized_depth ... ok
[INFO] [stdout] test visitor::dyn_safe ... ok
[INFO] [stdout] test report::oneline::simpler_undersized_depth ... ok
[INFO] [stdout] test report::oneline::simpler_heap ... ok
[INFO] [stdout] test report::oneline::simpler_exact_depth ... ok
[INFO] [stdout] test visitor::impls_alloc::box_impl ... ok
[INFO] [stdout] test visitor::impls_core::mut_impl ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 26 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b77d83763c1eb870b9de4d7177887674902b8a6f8c383dadbb68fa07304ef71e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b77d83763c1eb870b9de4d7177887674902b8a6f8c383dadbb68fa07304ef71e", kill_on_drop: false }`
[INFO] [stdout] b77d83763c1eb870b9de4d7177887674902b8a6f8c383dadbb68fa07304ef71e