[INFO] fetching crate utf8-decode 1.0.1...
[INFO] testing utf8-decode-1.0.1 against 1.54.0 for beta-1.55-1
[INFO] extracting crate utf8-decode 1.0.1 into /workspace/builds/worker-59/source
[INFO] validating manifest of crates.io crate utf8-decode 1.0.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate utf8-decode 1.0.1
[INFO] finished tweaking crates.io crate utf8-decode 1.0.1
[INFO] tweaked toml for crates.io crate utf8-decode 1.0.1 written to /workspace/builds/worker-59/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0610d24f09ff0c009ba96d836179aad3170c09c177e47ed758aad6cf6bcc6950
[INFO] running `Command { std: "docker" "start" "-a" "0610d24f09ff0c009ba96d836179aad3170c09c177e47ed758aad6cf6bcc6950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0610d24f09ff0c009ba96d836179aad3170c09c177e47ed758aad6cf6bcc6950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0610d24f09ff0c009ba96d836179aad3170c09c177e47ed758aad6cf6bcc6950", kill_on_drop: false }`
[INFO] [stdout] 0610d24f09ff0c009ba96d836179aad3170c09c177e47ed758aad6cf6bcc6950
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0fde6e12693f95e2d83abff2e2fb9f855bee406369c7c0415533c020bb31480
[INFO] running `Command { std: "docker" "start" "-a" "b0fde6e12693f95e2d83abff2e2fb9f855bee406369c7c0415533c020bb31480", kill_on_drop: false }`
[INFO] [stderr]    Compiling utf8-decode v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "b0fde6e12693f95e2d83abff2e2fb9f855bee406369c7c0415533c020bb31480", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0fde6e12693f95e2d83abff2e2fb9f855bee406369c7c0415533c020bb31480", kill_on_drop: false }`
[INFO] [stdout] b0fde6e12693f95e2d83abff2e2fb9f855bee406369c7c0415533c020bb31480
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0be92002955b02757b75601f3e8e91bb399a06344b9c946924efa07434866c24
[INFO] running `Command { std: "docker" "start" "-a" "0be92002955b02757b75601f3e8e91bb399a06344b9c946924efa07434866c24", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling utf8-decode v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `Command { std: "docker" "inspect" "0be92002955b02757b75601f3e8e91bb399a06344b9c946924efa07434866c24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0be92002955b02757b75601f3e8e91bb399a06344b9c946924efa07434866c24", kill_on_drop: false }`
[INFO] [stdout] 0be92002955b02757b75601f3e8e91bb399a06344b9c946924efa07434866c24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ffabd850149597a17b2338ed3520e678ad3ee1af59c8f6b14faae3c38b1fa8f6
[INFO] running `Command { std: "docker" "start" "-a" "ffabd850149597a17b2338ed3520e678ad3ee1af59c8f6b14faae3c38b1fa8f6", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/utf8_decode-60f0d53817cc049b)
[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 utf8-decode
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs - UnsafeDecoder (line 141) ... FAILED
[INFO] [stdout] test src/safe.rs - safe::Decoder (line 80) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 9) ... ok
[INFO] [stdout] test src/lib.rs - (line 35) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - UnsafeDecoder (line 141) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `File`
[INFO] [stdout]  --> src/lib.rs:142:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | let file = File::open("file.txt")?;
[INFO] [stdout]   |            ^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `UnsafeDecoder`
[INFO] [stdout]  --> src/lib.rs:144:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | let decoder = UnsafeDecoder::new(file.bytes());
[INFO] [stdout]   |               ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 | use utf8_decode::UnsafeDecoder;
[INFO] [stdout]   |
[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:142:34
[INFO] [stdout]    |
[INFO] [stdout] 2  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_141_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 3  | | let file = File::open("file.txt")?;
[INFO] [stdout]    | |                                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 4  | |
[INFO] [stdout] 5  | | let decoder = UnsafeDecoder::new(file.bytes());
[INFO] [stdout] ...  |
[INFO] [stdout] 10 | | }
[INFO] [stdout] 11 | | } _doctest_main_src_lib_rs_141_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[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:148:18
[INFO] [stdout]    |
[INFO] [stdout] 2  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_141_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 3  | | let file = File::open("file.txt")?;
[INFO] [stdout] 4  | |
[INFO] [stdout] 5  | | let decoder = UnsafeDecoder::new(file.bytes());
[INFO] [stdout] ...  |
[INFO] [stdout] 9  | |     string.push(c?);
[INFO] [stdout]    | |                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 10 | | }
[INFO] [stdout] 11 | | } _doctest_main_src_lib_rs_141_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 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/safe.rs - safe::Decoder (line 80) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Decoder`
[INFO] [stdout]  --> src/safe.rs:83:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | let decoder = Decoder::new(bytes.iter().cloned());
[INFO] [stdout]   |               ^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 | use utf8_decode::Decoder;
[INFO] [stdout]   |
[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/safe.rs:87:18
[INFO] [stdout]    |
[INFO] [stdout] 2  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_safe_rs_80_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 3  | | let bytes = [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33];
[INFO] [stdout] 4  | |
[INFO] [stdout] 5  | | let decoder = Decoder::new(bytes.iter().cloned());
[INFO] [stdout] ...  |
[INFO] [stdout] 9  | |     string.push(c?);
[INFO] [stdout]    | |                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | | println!("{}", string);
[INFO] [stdout] 13 | | } _doctest_main_src_safe_rs_80_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 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[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 - UnsafeDecoder (line 141)
[INFO] [stdout]     src/safe.rs - safe::Decoder (line 80)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.45s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "ffabd850149597a17b2338ed3520e678ad3ee1af59c8f6b14faae3c38b1fa8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffabd850149597a17b2338ed3520e678ad3ee1af59c8f6b14faae3c38b1fa8f6", kill_on_drop: false }`
[INFO] [stdout] ffabd850149597a17b2338ed3520e678ad3ee1af59c8f6b14faae3c38b1fa8f6
