[INFO] fetching crate wtf8-rs 1.0.0...
[INFO] testing wtf8-rs-1.0.0 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate wtf8-rs 1.0.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate wtf8-rs 1.0.0 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d951244506e8fd78f4f48b14d1d254a2a5315155d36b74cdb8be2170167d6248
[INFO] running `Command { std: "docker" "start" "-a" "d951244506e8fd78f4f48b14d1d254a2a5315155d36b74cdb8be2170167d6248", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d951244506e8fd78f4f48b14d1d254a2a5315155d36b74cdb8be2170167d6248", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d951244506e8fd78f4f48b14d1d254a2a5315155d36b74cdb8be2170167d6248", kill_on_drop: false }`
[INFO] [stdout] d951244506e8fd78f4f48b14d1d254a2a5315155d36b74cdb8be2170167d6248
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bc7ec29e06d247133634b650b78860d62c0d17f096d902abfb6a8b100f5e99a
[INFO] running `Command { std: "docker" "start" "-a" "1bc7ec29e06d247133634b650b78860d62c0d17f096d902abfb6a8b100f5e99a", kill_on_drop: false }`
[INFO] [stderr]    Compiling wtf8-rs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "1bc7ec29e06d247133634b650b78860d62c0d17f096d902abfb6a8b100f5e99a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bc7ec29e06d247133634b650b78860d62c0d17f096d902abfb6a8b100f5e99a", kill_on_drop: false }`
[INFO] [stdout] 1bc7ec29e06d247133634b650b78860d62c0d17f096d902abfb6a8b100f5e99a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7c4eba4dab48b0f2ae16d36eb7a717936dc6dcd5c2014c036caf6dc90e5e94a
[INFO] running `Command { std: "docker" "start" "-a" "c7c4eba4dab48b0f2ae16d36eb7a717936dc6dcd5c2014c036caf6dc90e5e94a", 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 1.17s
[INFO] running `Command { std: "docker" "inspect" "c7c4eba4dab48b0f2ae16d36eb7a717936dc6dcd5c2014c036caf6dc90e5e94a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7c4eba4dab48b0f2ae16d36eb7a717936dc6dcd5c2014c036caf6dc90e5e94a", kill_on_drop: false }`
[INFO] [stdout] c7c4eba4dab48b0f2ae16d36eb7a717936dc6dcd5c2014c036caf6dc90e5e94a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d99c7f1a4b443814291d64213bdcc1c1a7ee4b0cd092f3ade2b58ddd3f84a4cd
[INFO] running `Command { std: "docker" "start" "-a" "d99c7f1a4b443814291d64213bdcc1c1a7ee4b0cd092f3ade2b58ddd3f84a4cd", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[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 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/wtf8_rs-958f767eba384d5c)
[INFO] [stdout] 
[INFO] [stdout] running 38 tests
[INFO] [stdout] test codepoint::tests::code_point_from_char ... ok
[INFO] [stdout] test codepoint::tests::code_point_from_u32 ... ok
[INFO] [stdout] test codepoint::tests::code_point_to_char ... ok
[INFO] [stdout] test codepoint::tests::code_point_to_char_lossy ... ok
[INFO] [stdout] test codepoint::tests::code_point_to_string ... 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_display ... ok
[INFO] [stdout] test wtf8::tests::wtf8_encode_utf16 ... ok
[INFO] [stdout] test wtf8::tests::wtf8_code_points ... ok
[INFO] [stdout] test wtf8::tests::wtf8_from_str ... ok
[INFO] [stdout] test wtf8::tests::wtf8_len ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice_from ... ok
[INFO] [stdout] test wtf8::tests::wtf8_slice_to ... ok
[INFO] [stdout] test wtf8::tests::wtf8_to_string_lossy ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_as_slice ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_extend ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_iterator ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_str ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_string ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_from_utf16 ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_into_string ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_into_string_lossy ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_new ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push_str ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push_char ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_push_wtf8 ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_show ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_show_str ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_truncate ... 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 wtf8::tests::wtf8_slice_to_not_code_point_boundary - should panic ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_truncate_fail_code_point_boundary - should panic ... ok
[INFO] [stdout] test wtf8buf::tests::wtf8buf_truncate_fail_longer - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 38 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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" "d99c7f1a4b443814291d64213bdcc1c1a7ee4b0cd092f3ade2b58ddd3f84a4cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d99c7f1a4b443814291d64213bdcc1c1a7ee4b0cd092f3ade2b58ddd3f84a4cd", kill_on_drop: false }`
[INFO] [stdout] d99c7f1a4b443814291d64213bdcc1c1a7ee4b0cd092f3ade2b58ddd3f84a4cd