[INFO] fetching crate mutf8 0.5.0...
[INFO] testing mutf8-0.5.0 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate mutf8 0.5.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate mutf8 0.5.0 on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1ac2f538eaab628908fa309613bfaf4eab65dc1889a65070a426cdff481485ba
[INFO] running `Command { std: "docker" "start" "-a" "1ac2f538eaab628908fa309613bfaf4eab65dc1889a65070a426cdff481485ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ac2f538eaab628908fa309613bfaf4eab65dc1889a65070a426cdff481485ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ac2f538eaab628908fa309613bfaf4eab65dc1889a65070a426cdff481485ba", kill_on_drop: false }`
[INFO] [stdout] 1ac2f538eaab628908fa309613bfaf4eab65dc1889a65070a426cdff481485ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 60bf6207644b681de4ab653b6bcadb1e2cbfd0dc3a8a8275593c7ded2cedb5d2
[INFO] running `Command { std: "docker" "start" "-a" "60bf6207644b681de4ab653b6bcadb1e2cbfd0dc3a8a8275593c7ded2cedb5d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling mutf8 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "60bf6207644b681de4ab653b6bcadb1e2cbfd0dc3a8a8275593c7ded2cedb5d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60bf6207644b681de4ab653b6bcadb1e2cbfd0dc3a8a8275593c7ded2cedb5d2", kill_on_drop: false }`
[INFO] [stdout] 60bf6207644b681de4ab653b6bcadb1e2cbfd0dc3a8a8275593c7ded2cedb5d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c536030c527953d978cd092ec54cb7ac54a3c50f751d0bcd77bd6138f952e56
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3c536030c527953d978cd092ec54cb7ac54a3c50f751d0bcd77bd6138f952e56", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling serde_json v1.0.66
[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 7.01s
[INFO] running `Command { std: "docker" "inspect" "3c536030c527953d978cd092ec54cb7ac54a3c50f751d0bcd77bd6138f952e56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c536030c527953d978cd092ec54cb7ac54a3c50f751d0bcd77bd6138f952e56", kill_on_drop: false }`
[INFO] [stdout] 3c536030c527953d978cd092ec54cb7ac54a3c50f751d0bcd77bd6138f952e56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9a2bc757becd39e3cc8b8f33598184a47815f613a41c2a74a1d5de6b24496188
[INFO] running `Command { std: "docker" "start" "-a" "9a2bc757becd39e3cc8b8f33598184a47815f613a41c2a74a1d5de6b24496188", 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 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mutf8-2e5b14621e2cc349)
[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]      Running tests/serde.rs (/opt/rustwide/target/debug/deps/serde-c887831db8c17d28)
[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]      Running tests/to_mutf8.rs (/opt/rustwide/target/debug/deps/to_mutf8-7109e914bf800930)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mutf8
[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] error[E0659]: `mutf8` is ambiguous (name vs any other name during import resolution)
[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: `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 (name vs any other name during import resolution)
[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: `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" "9a2bc757becd39e3cc8b8f33598184a47815f613a41c2a74a1d5de6b24496188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a2bc757becd39e3cc8b8f33598184a47815f613a41c2a74a1d5de6b24496188", kill_on_drop: false }`
[INFO] [stdout] 9a2bc757becd39e3cc8b8f33598184a47815f613a41c2a74a1d5de6b24496188