[INFO] fetching crate sx1509 0.2.0...
[INFO] testing sx1509-0.2.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate sx1509 0.2.0 into /workspace/builds/worker-16/source
[INFO] validating manifest of crates.io crate sx1509 0.2.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sx1509 0.2.0
[INFO] finished tweaking crates.io crate sx1509 0.2.0
[INFO] tweaked toml for crates.io crate sx1509 0.2.0 written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ace18295bbb2f09ef75a44d020417fe80727581bec8fc3ca88b1ddbc067f100f
[INFO] running `Command { std: "docker" "start" "-a" "ace18295bbb2f09ef75a44d020417fe80727581bec8fc3ca88b1ddbc067f100f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ace18295bbb2f09ef75a44d020417fe80727581bec8fc3ca88b1ddbc067f100f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ace18295bbb2f09ef75a44d020417fe80727581bec8fc3ca88b1ddbc067f100f", kill_on_drop: false }`
[INFO] [stdout] ace18295bbb2f09ef75a44d020417fe80727581bec8fc3ca88b1ddbc067f100f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dbd102b1ceb837cd53cd123a2f95df770416d3684f886d6ad55e42be923f5c0
[INFO] running `Command { std: "docker" "start" "-a" "1dbd102b1ceb837cd53cd123a2f95df770416d3684f886d6ad55e42be923f5c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.6
[INFO] [stderr]    Compiling sx1509 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.21s
[INFO] running `Command { std: "docker" "inspect" "1dbd102b1ceb837cd53cd123a2f95df770416d3684f886d6ad55e42be923f5c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dbd102b1ceb837cd53cd123a2f95df770416d3684f886d6ad55e42be923f5c0", kill_on_drop: false }`
[INFO] [stdout] 1dbd102b1ceb837cd53cd123a2f95df770416d3684f886d6ad55e42be923f5c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c1ecfc0461b3461ce02ecf2359f250373afb77ec72be1bd8d0cba146cf0170a
[INFO] running `Command { std: "docker" "start" "-a" "0c1ecfc0461b3461ce02ecf2359f250373afb77ec72be1bd8d0cba146cf0170a", kill_on_drop: false }`
[INFO] [stderr]    Compiling sx1509 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "0c1ecfc0461b3461ce02ecf2359f250373afb77ec72be1bd8d0cba146cf0170a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c1ecfc0461b3461ce02ecf2359f250373afb77ec72be1bd8d0cba146cf0170a", kill_on_drop: false }`
[INFO] [stdout] 0c1ecfc0461b3461ce02ecf2359f250373afb77ec72be1bd8d0cba146cf0170a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 66c1302cddf314fbdc0bca9e326413fab307e43594c98a55e147db700a6e1a83
[INFO] running `Command { std: "docker" "start" "-a" "66c1302cddf314fbdc0bca9e326413fab307e43594c98a55e147db700a6e1a83", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sx1509-419ee7212baabce4)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sx1509
[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 4 tests
[INFO] [stdout] test src/lib.rs - (line 36) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - (line 74) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - (line 43) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - (line 58) - compile ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 36) stdout ----
[INFO] [stdout] error[E0463]: can't find crate for `metro_m0`
[INFO] [stdout]  --> src/lib.rs:36:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate metro_m0 as hal;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 74) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `expander` in this scope
[INFO] [stdout]  --> src/lib.rs:75:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | let mut owned = expander.take(i2c);
[INFO] [stdout]   |                 ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `i2c` in this scope
[INFO] [stdout]  --> src/lib.rs:75:31
[INFO] [stdout]   |
[INFO] [stdout] 3 | let mut owned = expander.take(i2c);
[INFO] [stdout]   |                               ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:78:44
[INFO] [stdout]     |
[INFO] [stdout] 2   |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_74_0() {
[INFO] [stdout]     |  ______________________________________-
[INFO] [stdout] 3   | | let mut owned = expander.take(i2c);
[INFO] [stdout] 4   | |
[INFO] [stdout] 5   | | // Now you can borrow and perform the IO when you are ready:
[INFO] [stdout] 6   | | let pins = owned.borrow().get_bank_a_data()?;
[INFO] [stdout]     | |                                            ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] ...   |
[INFO] [stdout] 9   | | let (expander, i2c) = owned.release();
[INFO] [stdout] 10  | | } _doctest_main_src_lib_rs_74_0() }
[INFO] [stdout]     | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0425.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 43) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `hal`
[INFO] [stdout]  --> src/lib.rs:44:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | let mut i2c = hal::I2CMaster3::new(
[INFO] [stdout]   |               ^^^ use of undeclared crate or module `hal`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Sercom3Pad0`
[INFO] [stdout]   --> src/lib.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Sercom3Pad0::Pa22(pins.pa22.into_function_c(&mut pins.port)),
[INFO] [stdout]    |     ^^^^^^^^^^^ use of undeclared type `Sercom3Pad0`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Sercom3Pad1`
[INFO] [stdout]   --> src/lib.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Sercom3Pad1::Pa23(pins.pa23.into_function_c(&mut pins.port)),
[INFO] [stdout]    |     ^^^^^^^^^^^ use of undeclared type `Sercom3Pad1`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `clocks` in this scope
[INFO] [stdout]  --> src/lib.rs:45:6
[INFO] [stdout]   |
[INFO] [stdout] 4 |     &clocks,
[INFO] [stdout]   |      ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `peripherals` in this scope
[INFO] [stdout]  --> src/lib.rs:47:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     peripherals.SERCOM3,
[INFO] [stdout]   |     ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `peripherals` in this scope
[INFO] [stdout]  --> src/lib.rs:48:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     &mut peripherals.PM,
[INFO] [stdout]   |          ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `peripherals` in this scope
[INFO] [stdout]  --> src/lib.rs:49:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     &mut peripherals.GCLK,
[INFO] [stdout]   |          ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `pins` in this scope
[INFO] [stdout]   --> src/lib.rs:51:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Sercom3Pad0::Pa22(pins.pa22.into_function_c(&mut pins.port)),
[INFO] [stdout]    |                       ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `pins` in this scope
[INFO] [stdout]   --> src/lib.rs:51:54
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Sercom3Pad0::Pa22(pins.pa22.into_function_c(&mut pins.port)),
[INFO] [stdout]    |                                                      ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `pins` in this scope
[INFO] [stdout]   --> src/lib.rs:52:23
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Sercom3Pad1::Pa23(pins.pa23.into_function_c(&mut pins.port)),
[INFO] [stdout]    |                       ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `pins` in this scope
[INFO] [stdout]   --> src/lib.rs:52:54
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Sercom3Pad1::Pa23(pins.pa23.into_function_c(&mut pins.port)),
[INFO] [stdout]    |                                                      ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `khz` found for type `{integer}` in the current scope
[INFO] [stdout]  --> src/lib.rs:46:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     400.khz(),
[INFO] [stdout]   |         ^^^ method not found in `{integer}`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 12 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 58) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `i2c` in this scope
[INFO] [stdout]  --> src/lib.rs:59:45
[INFO] [stdout]   |
[INFO] [stdout] 4 | let mut expander = sx1509::Sx1509::new(&mut i2c, sx1509::DEFAULT_ADDRESS);
[INFO] [stdout]   |                                             ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `i2c` in this scope
[INFO] [stdout]  --> src/lib.rs:60:22
[INFO] [stdout]   |
[INFO] [stdout] 5 | expander.borrow(&mut i2c).software_reset()?;
[INFO] [stdout]   |                      ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `i2c` in this scope
[INFO] [stdout]  --> src/lib.rs:61:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | expander.borrow(&mut i2c).set_bank_a_direction(0)?;
[INFO] [stdout]   |                      ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `i2c` in this scope
[INFO] [stdout]  --> src/lib.rs:63:33
[INFO] [stdout]   |
[INFO] [stdout] 8 | let pins = expander.borrow(&mut i2c).get_bank_a_data()?;
[INFO] [stdout]   |                                 ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:60:43
[INFO] [stdout]     |
[INFO] [stdout] 3   |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_58_0() {
[INFO] [stdout]     |  ______________________________________-
[INFO] [stdout] 4   | | let mut expander = sx1509::Sx1509::new(&mut i2c, sx1509::DEFAULT_ADDRESS);
[INFO] [stdout] 5   | | expander.borrow(&mut i2c).software_reset()?;
[INFO] [stdout]     | |                                           ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 6   | | expander.borrow(&mut i2c).set_bank_a_direction(0)?;
[INFO] [stdout] 7   | | // read the pins from bank a
[INFO] [stdout] 8   | | let pins = expander.borrow(&mut i2c).get_bank_a_data()?;
[INFO] [stdout] 9   | | } _doctest_main_src_lib_rs_58_0() }
[INFO] [stdout]     | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Result<Infallible, _>>` is not implemented for `()`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:61:50
[INFO] [stdout]     |
[INFO] [stdout] 3   |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_58_0() {
[INFO] [stdout]     |  ______________________________________-
[INFO] [stdout] 4   | | let mut expander = sx1509::Sx1509::new(&mut i2c, sx1509::DEFAULT_ADDRESS);
[INFO] [stdout] 5   | | expander.borrow(&mut i2c).software_reset()?;
[INFO] [stdout] 6   | | expander.borrow(&mut i2c).set_bank_a_direction(0)?;
[INFO] [stdout]     | |                                                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 7   | | // read the pins from bank a
[INFO] [stdout] 8   | | let pins = expander.borrow(&mut i2c).get_bank_a_data()?;
[INFO] [stdout] 9   | | } _doctest_main_src_lib_rs_58_0() }
[INFO] [stdout]     | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Result<Infallible, _>>` is not implemented for `()`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:63:55
[INFO] [stdout]     |
[INFO] [stdout] 3   |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_58_0() {
[INFO] [stdout]     |  ______________________________________-
[INFO] [stdout] 4   | | let mut expander = sx1509::Sx1509::new(&mut i2c, sx1509::DEFAULT_ADDRESS);
[INFO] [stdout] 5   | | expander.borrow(&mut i2c).software_reset()?;
[INFO] [stdout] 6   | | expander.borrow(&mut i2c).set_bank_a_direction(0)?;
[INFO] [stdout] 7   | | // read the pins from bank a
[INFO] [stdout] 8   | | let pins = expander.borrow(&mut i2c).get_bank_a_data()?;
[INFO] [stdout]     | |                                                       ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 9   | | } _doctest_main_src_lib_rs_58_0() }
[INFO] [stdout]     | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Result<Infallible, _>>` is not implemented for `()`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0425.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 36)
[INFO] [stdout]     src/lib.rs - (line 43)
[INFO] [stdout]     src/lib.rs - (line 58)
[INFO] [stdout]     src/lib.rs - (line 74)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.20s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "66c1302cddf314fbdc0bca9e326413fab307e43594c98a55e147db700a6e1a83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66c1302cddf314fbdc0bca9e326413fab307e43594c98a55e147db700a6e1a83", kill_on_drop: false }`
[INFO] [stdout] 66c1302cddf314fbdc0bca9e326413fab307e43594c98a55e147db700a6e1a83
