[INFO] fetching crate mutf8 0.5.0...
[INFO] testing mutf8-0.5.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate mutf8 0.5.0 into /workspace/builds/worker-107/source
[INFO] validating manifest of crates.io crate mutf8 0.5.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutf8 0.5.0
[INFO] finished tweaking crates.io crate mutf8 0.5.0
[INFO] tweaked toml for crates.io crate mutf8 0.5.0 written to /workspace/builds/worker-107/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d66b9eb10ab3755f4783a1973971d195b93fd84f593991435d2b4d65503057af
[INFO] running `Command { std: "docker" "start" "-a" "d66b9eb10ab3755f4783a1973971d195b93fd84f593991435d2b4d65503057af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d66b9eb10ab3755f4783a1973971d195b93fd84f593991435d2b4d65503057af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d66b9eb10ab3755f4783a1973971d195b93fd84f593991435d2b4d65503057af", kill_on_drop: false }`
[INFO] [stdout] d66b9eb10ab3755f4783a1973971d195b93fd84f593991435d2b4d65503057af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d673a278f02a378ec9a1b33aae6a9b08fba73825e878206e0847eccb98ba463
[INFO] running `Command { std: "docker" "start" "-a" "4d673a278f02a378ec9a1b33aae6a9b08fba73825e878206e0847eccb98ba463", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mutf8 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "4d673a278f02a378ec9a1b33aae6a9b08fba73825e878206e0847eccb98ba463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d673a278f02a378ec9a1b33aae6a9b08fba73825e878206e0847eccb98ba463", kill_on_drop: false }`
[INFO] [stdout] 4d673a278f02a378ec9a1b33aae6a9b08fba73825e878206e0847eccb98ba463
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04756c0c842efc351cd92b5b94f0e3551332b02903122b22550eaf17621193c9
[INFO] running `Command { std: "docker" "start" "-a" "04756c0c842efc351cd92b5b94f0e3551332b02903122b22550eaf17621193c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling mutf8 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `mutf8::mutf8_to_utf8`
[INFO] [stdout]  --> tests/to_mutf8.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use mutf8::mutf8_to_utf8;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 18.63s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/mutf8-583b51337cc46c41)
[INFO] [stderr]   Executable tests/serde.rs (/opt/rustwide/target/debug/deps/serde-7f4a64f7b00f28c1)
[INFO] [stderr]   Executable tests/to_mutf8.rs (/opt/rustwide/target/debug/deps/to_mutf8-a085b975d4a5bb2a)
[INFO] running `Command { std: "docker" "inspect" "04756c0c842efc351cd92b5b94f0e3551332b02903122b22550eaf17621193c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04756c0c842efc351cd92b5b94f0e3551332b02903122b22550eaf17621193c9", kill_on_drop: false }`
[INFO] [stdout] 04756c0c842efc351cd92b5b94f0e3551332b02903122b22550eaf17621193c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9cd9475230bad453c61aaf2984dcbd3541895223b2911a1035f19cf26c530b1d
[INFO] running `Command { std: "docker" "start" "-a" "9cd9475230bad453c61aaf2984dcbd3541895223b2911a1035f19cf26c530b1d", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `mutf8::mutf8_to_utf8`
[INFO] [stderr]  --> tests/to_mutf8.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use mutf8::mutf8_to_utf8;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mutf8` (test "to_mutf8") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mutf8-583b51337cc46c41)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running tests/serde.rs (/opt/rustwide/target/debug/deps/serde-7f4a64f7b00f28c1)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.09s
[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 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/to_mutf8.rs (/opt/rustwide/target/debug/deps/to_mutf8-a085b975d4a5bb2a)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test ascii_test ... ok
[INFO] [stdout] test nul_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mutf8
[INFO] [stderr] error[E0659]: `mutf8` is ambiguous
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub use mutf8::mutf8_to_utf8;
[INFO] [stderr]    |         ^^^^^ ambiguous name
[INFO] [stderr]    |
[INFO] [stderr]    = note: ambiguous because of multiple potential import sources
[INFO] [stderr]    = note: `mutf8` could refer to a crate passed with `--extern`
[INFO] [stderr]    = help: use `::mutf8` to refer to this crate unambiguously
[INFO] [stderr] note: `mutf8` could also refer to the module defined here
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | mod mutf8;
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr]    = help: use `crate::mutf8` to refer to this module unambiguously
[INFO] [stderr] 
[INFO] [stderr] error[E0659]: `mutf8` is ambiguous
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub use mutf8::utf8_to_mutf8;
[INFO] [stderr]    |         ^^^^^ ambiguous name
[INFO] [stderr]    |
[INFO] [stderr]    = note: ambiguous because of multiple potential import sources
[INFO] [stderr]    = note: `mutf8` could refer to a crate passed with `--extern`
[INFO] [stderr]    = help: use `::mutf8` to refer to this crate unambiguously
[INFO] [stderr] note: `mutf8` could also refer to the module defined here
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | mod mutf8;
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr]    = help: use `crate::mutf8` to refer to this module unambiguously
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0659`.
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "9cd9475230bad453c61aaf2984dcbd3541895223b2911a1035f19cf26c530b1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cd9475230bad453c61aaf2984dcbd3541895223b2911a1035f19cf26c530b1d", kill_on_drop: false }`
[INFO] [stdout] 9cd9475230bad453c61aaf2984dcbd3541895223b2911a1035f19cf26c530b1d