[INFO] fetching crate slice 0.0.4... [INFO] testing slice-0.0.4 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530 [INFO] extracting crate slice 0.0.4 into /workspace/builds/worker-10/source [INFO] validating manifest of crates.io crate slice 0.0.4 on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate slice 0.0.4 [INFO] finished tweaking crates.io crate slice 0.0.4 [INFO] tweaked toml for crates.io crate slice 0.0.4 written to /workspace/builds/worker-10/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 94aa7dd0e81314e1eb1ad62d5fbf29ad6c7c89d015dd17def66caee2f6cd20f4 [INFO] running `Command { std: "docker" "start" "-a" "94aa7dd0e81314e1eb1ad62d5fbf29ad6c7c89d015dd17def66caee2f6cd20f4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "94aa7dd0e81314e1eb1ad62d5fbf29ad6c7c89d015dd17def66caee2f6cd20f4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "94aa7dd0e81314e1eb1ad62d5fbf29ad6c7c89d015dd17def66caee2f6cd20f4", kill_on_drop: false }` [INFO] [stdout] 94aa7dd0e81314e1eb1ad62d5fbf29ad6c7c89d015dd17def66caee2f6cd20f4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 05ccdbd3a7aadcf0491afb6f7613482581d6e05695e86a41de0ab00f78f8b1d5 [INFO] running `Command { std: "docker" "start" "-a" "05ccdbd3a7aadcf0491afb6f7613482581d6e05695e86a41de0ab00f78f8b1d5", kill_on_drop: false }` [INFO] [stderr] Compiling slice v0.0.4 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.22s [INFO] running `Command { std: "docker" "inspect" "05ccdbd3a7aadcf0491afb6f7613482581d6e05695e86a41de0ab00f78f8b1d5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "05ccdbd3a7aadcf0491afb6f7613482581d6e05695e86a41de0ab00f78f8b1d5", kill_on_drop: false }` [INFO] [stdout] 05ccdbd3a7aadcf0491afb6f7613482581d6e05695e86a41de0ab00f78f8b1d5 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3a5af96d0ee817274ee18d798c365719f93f9e01c95a7256dcca246103521555 [INFO] running `Command { std: "docker" "start" "-a" "3a5af96d0ee817274ee18d798c365719f93f9e01c95a7256dcca246103521555", kill_on_drop: false }` [INFO] [stderr] Compiling slice v0.0.4 (/opt/rustwide/workdir) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.26s [INFO] running `Command { std: "docker" "inspect" "3a5af96d0ee817274ee18d798c365719f93f9e01c95a7256dcca246103521555", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3a5af96d0ee817274ee18d798c365719f93f9e01c95a7256dcca246103521555", kill_on_drop: false }` [INFO] [stdout] 3a5af96d0ee817274ee18d798c365719f93f9e01c95a7256dcca246103521555 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 6ccb112cf74bcd24e7d3617247bfea94c704b9a7397a6cab4e9e575430397ae2 [INFO] running `Command { std: "docker" "start" "-a" "6ccb112cf74bcd24e7d3617247bfea94c704b9a7397a6cab4e9e575430397ae2", kill_on_drop: false }` [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/slice-a6d6e1cca5c13af9) [INFO] [stdout] [INFO] [stderr] Doc-tests slice [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 2 tests [INFO] [stdout] test src/lib.rs - (line 10) ... FAILED [INFO] [stdout] test src/lib.rs - IoSlice (line 56) ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/lib.rs - (line 10) 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:14:48 [INFO] [stdout] | [INFO] [stdout] 3 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_10_0() { [INFO] [stdout] | ______________________________________- [INFO] [stdout] 4 | | use { std::fs::File, slice::IoSlice }; [INFO] [stdout] 5 | | [INFO] [stdout] 6 | | [INFO] [stdout] 7 | | let source = File::open("/home/annie/data.png")?; [INFO] [stdout] | | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] ... | [INFO] [stdout] 27 | | // [INFO] [stdout] 28 | | } _doctest_main_src_lib_rs_10_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 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - IoSlice (line 56) 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:60:48 [INFO] [stdout] | [INFO] [stdout] 3 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_56_0() { [INFO] [stdout] | ______________________________________- [INFO] [stdout] 4 | | use { std::fs::File, slice::IoSlice }; [INFO] [stdout] 5 | | [INFO] [stdout] 6 | | [INFO] [stdout] 7 | | let source = File::open("/home/annie/data.png")?; [INFO] [stdout] | | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] ... | [INFO] [stdout] 27 | | // [INFO] [stdout] 28 | | } _doctest_main_src_lib_rs_56_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 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/lib.rs - (line 10) [INFO] [stdout] src/lib.rs - IoSlice (line 56) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 2 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" "6ccb112cf74bcd24e7d3617247bfea94c704b9a7397a6cab4e9e575430397ae2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6ccb112cf74bcd24e7d3617247bfea94c704b9a7397a6cab4e9e575430397ae2", kill_on_drop: false }` [INFO] [stdout] 6ccb112cf74bcd24e7d3617247bfea94c704b9a7397a6cab4e9e575430397ae2