[INFO] fetching crate wtf8-rs 1.0.0...
[INFO] testing wtf8-rs-1.0.0 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate wtf8-rs 1.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate wtf8-rs 1.0.0 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 wtf8-rs 1.0.0
[INFO] finished tweaking crates.io crate wtf8-rs 1.0.0
[INFO] tweaked toml for crates.io crate wtf8-rs 1.0.0 written to /workspace/builds/worker-6/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] [stderr]     Blocking waiting for file lock on package cache
[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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] 9499996793da64d2b91d6182a6fc5af96893a2e17d435a5a55faa451569dea4c
[INFO] running `Command { std: "docker" "start" "-a" "9499996793da64d2b91d6182a6fc5af96893a2e17d435a5a55faa451569dea4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9499996793da64d2b91d6182a6fc5af96893a2e17d435a5a55faa451569dea4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9499996793da64d2b91d6182a6fc5af96893a2e17d435a5a55faa451569dea4c", kill_on_drop: false }`
[INFO] [stdout] 9499996793da64d2b91d6182a6fc5af96893a2e17d435a5a55faa451569dea4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] fcd651af9cb5c7a6388d089dc111d18b782d6b46ffa1dc813bd2fe11e055fb70
[INFO] running `Command { std: "docker" "start" "-a" "fcd651af9cb5c7a6388d089dc111d18b782d6b46ffa1dc813bd2fe11e055fb70", kill_on_drop: false }`
[INFO] [stderr]    Compiling wtf8-rs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "fcd651af9cb5c7a6388d089dc111d18b782d6b46ffa1dc813bd2fe11e055fb70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcd651af9cb5c7a6388d089dc111d18b782d6b46ffa1dc813bd2fe11e055fb70", kill_on_drop: false }`
[INFO] [stdout] fcd651af9cb5c7a6388d089dc111d18b782d6b46ffa1dc813bd2fe11e055fb70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] b2856b8bd5dd79b8de93c8e2e6adfdc265c214e08c592ced409dedff53e81fc2
[INFO] running `Command { std: "docker" "start" "-a" "b2856b8bd5dd79b8de93c8e2e6adfdc265c214e08c592ced409dedff53e81fc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling wtf8-rs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/wtf8/tests.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     &Wtf8::new("aé 💩")[2..4];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/wtf8/tests.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     &Wtf8::new("aé 💩")[2..];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/wtf8/tests.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     &Wtf8::new("aé 💩")[5..];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "b2856b8bd5dd79b8de93c8e2e6adfdc265c214e08c592ced409dedff53e81fc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2856b8bd5dd79b8de93c8e2e6adfdc265c214e08c592ced409dedff53e81fc2", kill_on_drop: false }`
[INFO] [stdout] b2856b8bd5dd79b8de93c8e2e6adfdc265c214e08c592ced409dedff53e81fc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] bea08bba937b887dc3a2adacc06be94f4d48f3077953c314d7d5901817dd036c
[INFO] running `Command { std: "docker" "start" "-a" "bea08bba937b887dc3a2adacc06be94f4d48f3077953c314d7d5901817dd036c", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stdout] running 38 tests
[INFO] [stderr]   --> src/wtf8/tests.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     &Wtf8::new("aé 💩")[2..4];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/wtf8/tests.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     &Wtf8::new("aé 💩")[2..];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/wtf8/tests.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     &Wtf8::new("aé 💩")[5..];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `wtf8-rs` (lib test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/wtf8_rs-958f767eba384d5c)
[INFO] [stdout] test wtf8::tests::wtf8_from_str ... ok
[INFO] [stdout] test wtf8::tests::wtf8_len ... ok
[INFO] [stdout] test codepoint::tests::code_point_to_char_lossy ... ok
[INFO] [stdout] test codepoint::tests::code_point_to_char ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice_to ... ok
[INFO] [stdout] test codepoint::tests::code_point_to_u32 ... ok
[INFO] [stdout] test wtf8::tests::wtf8_as_str ... ok
[INFO] [stdout] test wtf8::tests::wtf8_ascii_byte_at ... ok
[INFO] [stdout] test wtf8::tests::wtf8_code_points ... ok
[INFO] [stdout] test wtf8::tests::wtf8_display ... ok
[INFO] [stdout] test wtf8::tests::wtf8_encode_utf16 ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice_from ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_string ... ok
[INFO] [stdout] test codepoint::tests::code_point_from_char ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_utf16 ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_show ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_show_str ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_into_string ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_into_string_lossy ... ok
[INFO] [stdout] test codepoint::tests::code_point_to_string ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_new ... ok
[INFO] [stdout] test codepoint::tests::code_point_from_u32 ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_truncate ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_str ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_iterator ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push_wtf8 ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push_char ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_as_slice ... ok
[INFO] [stdout] test wtf8::tests::wtf8_to_string_lossy ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push_str ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_extend ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice_to_not_code_point_boundary - should panic ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice_from_not_code_point_boundary - should panic ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice_not_code_point_boundary - should panic ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_truncate_fail_longer - should panic ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_truncate_fail_code_point_boundary - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 38 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests wtf8-rs
[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] running `Command { std: "docker" "inspect" "bea08bba937b887dc3a2adacc06be94f4d48f3077953c314d7d5901817dd036c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bea08bba937b887dc3a2adacc06be94f4d48f3077953c314d7d5901817dd036c", kill_on_drop: false }`
[INFO] [stdout] bea08bba937b887dc3a2adacc06be94f4d48f3077953c314d7d5901817dd036c