[INFO] fetching crate upc 1.0.0...
[INFO] testing upc-1.0.0 against 1.100.0-beta.1 for beta-1.100-2
[INFO] extracting crate upc 1.0.0 into /workspace/builds/worker-0-tc2/source
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate upc 1.0.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate upc 1.0.0
[INFO] tweaked toml for crates.io crate upc 1.0.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate upc 1.0.0 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate upc 1.0.0 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" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474
[INFO] running `Command { std: "docker" "start" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling futures-task v0.3.32
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling tracing-core v0.1.36
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling tokio-macros v2.6.1
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling bytes v1.11.1
[INFO] [stderr]    Compiling uuid v1.22.0
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling futures-executor v0.3.32
[INFO] [stderr]    Compiling futures v0.3.32
[INFO] [stderr]    Compiling upc v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused dependency `bytes`
[INFO] [stderr]  --> Cargo.toml:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 | [dependencies.bytes]
[INFO] [stderr]   |               ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `bytes`
[INFO] [stderr] warning: unused dependency `futures`
[INFO] [stderr]   --> Cargo.toml:14:15
[INFO] [stderr]    |
[INFO] [stderr] 14 | [dependencies.futures]
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `futures`
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]   --> Cargo.toml:31:15
[INFO] [stderr]    |
[INFO] [stderr] 31 | [dependencies.tokio]
[INFO] [stderr]    |               ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] warning: unused dependency `tracing`
[INFO] [stderr]   --> Cargo.toml:35:15
[INFO] [stderr]    |
[INFO] [stderr] 35 | [dependencies.tracing]
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tracing`
[INFO] [stderr] warning: unused dependency `uuid`
[INFO] [stderr]   --> Cargo.toml:53:15
[INFO] [stderr]    |
[INFO] [stderr] 53 | [dependencies.uuid]
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `uuid`
[INFO] [stderr] warning: `upc` (manifest) generated 5 warnings
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.26s
[INFO] running `Command { std: "docker" "inspect" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.183
[INFO] [stderr]    Compiling tracing-core v0.1.36
[INFO] [stderr]    Compiling rand_core v0.10.0
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling sdd v3.0.10
[INFO] [stderr]    Compiling cpufeatures v0.3.0
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling chacha20 v0.10.0
[INFO] [stderr]    Compiling serial_test_derive v3.4.0
[INFO] [stderr]    Compiling thread_local v1.1.9
[INFO] [stderr]    Compiling scc v2.4.0
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling mio v1.1.1
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling rand v0.10.0
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling serial_test v3.4.0
[INFO] [stderr]    Compiling matchers v0.2.0
[INFO] [stderr]    Compiling tracing-subscriber v0.3.23
[INFO] [stderr]    Compiling upc v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused dependency `bytes`
[INFO] [stderr]  --> Cargo.toml:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 | [dependencies.bytes]
[INFO] [stderr]   |               ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `bytes`
[INFO] [stderr] warning: unused dependency `futures`
[INFO] [stderr]   --> Cargo.toml:14:15
[INFO] [stderr]    |
[INFO] [stderr] 14 | [dependencies.futures]
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `futures`
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]   --> Cargo.toml:80:19
[INFO] [stderr]    |
[INFO] [stderr] 80 | [dev-dependencies.tokio]
[INFO] [stderr]    |                   ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]   --> Cargo.toml:31:15
[INFO] [stderr]    |
[INFO] [stderr] 31 | [dependencies.tokio]
[INFO] [stderr]    |               ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]    --> Cargo.toml:151:61
[INFO] [stderr]     |
[INFO] [stderr] 151 | [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies.tokio]
[INFO] [stderr]     |                                                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] warning: unused dependency `tracing`
[INFO] [stderr]   --> Cargo.toml:35:15
[INFO] [stderr]    |
[INFO] [stderr] 35 | [dependencies.tracing]
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tracing`
[INFO] [stderr] warning: unused dependency `uuid`
[INFO] [stderr]   --> Cargo.toml:53:15
[INFO] [stderr]    |
[INFO] [stderr] 53 | [dependencies.uuid]
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `uuid`
[INFO] [stderr] warning: `upc` (manifest) generated 7 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 22.95s
[INFO] running `Command { std: "docker" "inspect" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] warning: unused dependency `bytes`
[INFO] [stderr]  --> Cargo.toml:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 | [dependencies.bytes]
[INFO] [stderr]   |               ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `bytes`
[INFO] [stderr] warning: unused dependency `futures`
[INFO] [stderr]   --> Cargo.toml:14:15
[INFO] [stderr]    |
[INFO] [stderr] 14 | [dependencies.futures]
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `futures`
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]   --> Cargo.toml:80:19
[INFO] [stderr]    |
[INFO] [stderr] 80 | [dev-dependencies.tokio]
[INFO] [stderr]    |                   ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]   --> Cargo.toml:31:15
[INFO] [stderr]    |
[INFO] [stderr] 31 | [dependencies.tokio]
[INFO] [stderr]    |               ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] warning: unused dependency `tokio`
[INFO] [stderr]    --> Cargo.toml:151:61
[INFO] [stderr]     |
[INFO] [stderr] 151 | [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies.tokio]
[INFO] [stderr]     |                                                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: consider removing the dependency on `tokio`
[INFO] [stderr] warning: unused dependency `tracing`
[INFO] [stderr]   --> Cargo.toml:35:15
[INFO] [stderr]    |
[INFO] [stderr] 35 | [dependencies.tracing]
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `tracing`
[INFO] [stderr] warning: unused dependency `uuid`
[INFO] [stderr]   --> Cargo.toml:53:15
[INFO] [stderr]    |
[INFO] [stderr] 53 | [dependencies.uuid]
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider removing the dependency on `uuid`
[INFO] [stderr] warning: `upc` (manifest) generated 7 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/build/upc/3f322e2645de529c/out/upc-3f322e2645de529c)
[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 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 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/failure.rs (/opt/rustwide/target/debug/build/upc/9bbc03c36f91cdf3/out/failure-9bbc03c36f91cdf3)
[INFO] [stderr]      Running tests/half_close.rs (/opt/rustwide/target/debug/build/upc/c657a09185d1462f/out/half_close-c657a09185d1462f)
[INFO] [stderr]      Running tests/invalid_ctrl.rs (/opt/rustwide/target/debug/build/upc/4aafcdd8897d64ce/out/invalid_ctrl-4aafcdd8897d64ce)
[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/loopback.rs (/opt/rustwide/target/debug/build/upc/2eaa9d86435bcf09/out/loopback-2eaa9d86435bcf09)
[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/web.rs (/opt/rustwide/target/debug/build/upc/4f370680f72e642d/out/web-4f370680f72e642d)
[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]    Doc-tests upc
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 78) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - (line 53) - compile ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 78) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `upc::device`
[INFO] [stdout]   --> src/lib.rs:81:11
[INFO] [stdout]    |
[INFO] [stdout] 81 | use upc::{device::{InterfaceId, UpcFunction}, Class};
[INFO] [stdout]    |           ^^^^^^ could not find `device` in `upc`
[INFO] [stdout]    |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]   --> src/lib.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout]  9 | #[cfg(feature = "device")]
[INFO] [stdout]    |       ------------------ the item is gated behind the `device` feature
[INFO] [stdout] 10 | pub mod device;
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `usb_gadget`
[INFO] [stdout]   --> src/lib.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | use usb_gadget::{default_udc, Config, Gadget, Id, OsDescriptor, Strings};
[INFO] [stdout]    |     ^^^^^^^^^^ use of unresolved module or unlinked crate `usb_gadget`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `usb_gadget`, use `cargo add usb_gadget` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 53) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `upc::host`
[INFO] [stdout]   --> src/lib.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 | use upc::{host::{connect, find_interface}, Class};
[INFO] [stdout]    |           ^^^^ could not find `host` in `upc`
[INFO] [stdout]    |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]   --> src/lib.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[cfg(any(feature = "host", feature = "web"))]
[INFO] [stdout]    |          ----------------------------------- the item is gated here
[INFO] [stdout] 13 | pub mod host;
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `nusb` in this scope
[INFO] [stdout]   --> src/lib.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let dev_info = nusb::list_devices().await?
[INFO] [stdout]    |                    ^^^^ use of unresolved module or unlinked crate `nusb`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `nusb`, use `cargo add nusb` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] warning: method call on a diverging inference variable
[INFO] [stdout]   --> src/lib.rs:63:10
[INFO] [stdout]    |
[INFO] [stdout] 63 |         .find(|d| d.vendor_id() == 0x1209 && d.product_id() == 0x0001)
[INFO] [stdout]    |          ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider providing a type annotation
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #156047 <https://github.com/rust-lang/rust/issues/156047>
[INFO] [stdout]    = note: `#[warn(method_call_on_diverging_infer_var)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: `?` operator has incompatible types
[INFO] [stdout]   --> src/lib.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let dev_info = nusb::list_devices().await?
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `&mut _`, found `!`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `?` operator cannot convert from `!` to `&mut _`
[INFO] [stdout]    = note: expected mutable reference `&mut _`
[INFO] [stdout]                            found type `!`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 53)
[INFO] [stdout]     src/lib.rs - (line 78)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.14s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474", kill_on_drop: false }`
[INFO] [stdout] d7eaab317c85bed90e19fe02463c048f64900a59998096344581621b5fe6c474
