[INFO] fetching crate utf8-decode 1.0.1...
[INFO] testing utf8-decode-1.0.1 against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] extracting crate utf8-decode 1.0.1 into /workspace/builds/worker-7-tc2/source
[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-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate utf8-decode 1.0.1 on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66c5769b867420c05088f56a2a9a571b0dbdacf322da34e86f347f5c066cbf7f
[INFO] running `Command { std: "docker" "start" "-a" "66c5769b867420c05088f56a2a9a571b0dbdacf322da34e86f347f5c066cbf7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66c5769b867420c05088f56a2a9a571b0dbdacf322da34e86f347f5c066cbf7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66c5769b867420c05088f56a2a9a571b0dbdacf322da34e86f347f5c066cbf7f", kill_on_drop: false }`
[INFO] [stdout] 66c5769b867420c05088f56a2a9a571b0dbdacf322da34e86f347f5c066cbf7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4f1b462f0ee67fdd33d44d4755512a46ac58a56aa698eaadf77a2d31fc0943a
[INFO] running `Command { std: "docker" "start" "-a" "e4f1b462f0ee67fdd33d44d4755512a46ac58a56aa698eaadf77a2d31fc0943a", kill_on_drop: false }`
[INFO] [stderr]    Compiling utf8-decode v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "e4f1b462f0ee67fdd33d44d4755512a46ac58a56aa698eaadf77a2d31fc0943a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4f1b462f0ee67fdd33d44d4755512a46ac58a56aa698eaadf77a2d31fc0943a", kill_on_drop: false }`
[INFO] [stdout] e4f1b462f0ee67fdd33d44d4755512a46ac58a56aa698eaadf77a2d31fc0943a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cca4889bf8f28989ac33e9bf0e1d8a5f6f8786974b30b3304047ec2e70351d58
[INFO] running `Command { std: "docker" "start" "-a" "cca4889bf8f28989ac33e9bf0e1d8a5f6f8786974b30b3304047ec2e70351d58", kill_on_drop: false }`
[INFO] [stderr]    Compiling utf8-decode v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "cca4889bf8f28989ac33e9bf0e1d8a5f6f8786974b30b3304047ec2e70351d58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cca4889bf8f28989ac33e9bf0e1d8a5f6f8786974b30b3304047ec2e70351d58", kill_on_drop: false }`
[INFO] [stdout] cca4889bf8f28989ac33e9bf0e1d8a5f6f8786974b30b3304047ec2e70351d58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 121ce0464fe18653f1fdcdddbb3685fdd4a2dd130f9425f7bab4a963a5b49917
[INFO] running `Command { std: "docker" "start" "-a" "121ce0464fe18653f1fdcdddbb3685fdd4a2dd130f9425f7bab4a963a5b49917", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/utf8_decode-b1d272802c471462)
[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/safe.rs - safe::Decoder (line 80) ... FAILED
[INFO] [stdout] test src/lib.rs - UnsafeDecoder (line 141) ... 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/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] 83 | let decoder = Decoder::new(bytes.iter().cloned());
[INFO] [stdout]    |               ^^^^^^^ use of undeclared type `Decoder`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 80 + 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] 80 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_safe_rs_80_0() {
[INFO] [stdout]    |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 87 |     string.push(c?);
[INFO] [stdout]    |                  ^ cannot use the `?` operator in a function that returns `()`
[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] ---- 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] 142 | let file = File::open("file.txt")?;
[INFO] [stdout]     |            ^^^^ use of undeclared type `File`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]     |
[INFO] [stdout] 141 + 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] 144 | let decoder = UnsafeDecoder::new(file.bytes());
[INFO] [stdout]     |               ^^^^^^^^^^^^^ use of undeclared type `UnsafeDecoder`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]     |
[INFO] [stdout] 141 + 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:148:18
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_141_0() {
[INFO] [stdout]     |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 148 |     string.push(c?);
[INFO] [stdout]     |                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 0.26s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "121ce0464fe18653f1fdcdddbb3685fdd4a2dd130f9425f7bab4a963a5b49917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "121ce0464fe18653f1fdcdddbb3685fdd4a2dd130f9425f7bab4a963a5b49917", kill_on_drop: false }`
[INFO] [stdout] 121ce0464fe18653f1fdcdddbb3685fdd4a2dd130f9425f7bab4a963a5b49917
