[INFO] fetching crate ein-ffi 0.6.0...
[INFO] testing ein-ffi-0.6.0 against 1.77.0 for beta-1.78-1
[INFO] extracting crate ein-ffi 0.6.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate ein-ffi 0.6.0 on toolchain 1.77.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.77.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ein-ffi 0.6.0
[INFO] finished tweaking crates.io crate ein-ffi 0.6.0
[INFO] tweaked toml for crates.io crate ein-ffi 0.6.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.77.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.77.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.77.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca4bbf7b26bf8dd0e51c90b39873680ae92647b01a7b401073e9f95eca8bbd7d
[INFO] running `Command { std: "docker" "start" "-a" "ca4bbf7b26bf8dd0e51c90b39873680ae92647b01a7b401073e9f95eca8bbd7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca4bbf7b26bf8dd0e51c90b39873680ae92647b01a7b401073e9f95eca8bbd7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca4bbf7b26bf8dd0e51c90b39873680ae92647b01a7b401073e9f95eca8bbd7d", kill_on_drop: false }`
[INFO] [stdout] ca4bbf7b26bf8dd0e51c90b39873680ae92647b01a7b401073e9f95eca8bbd7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.77.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff3d958772e32b90e89fbaa42fa2253084916ce97397ec855d05381219df2ec4
[INFO] running `Command { std: "docker" "start" "-a" "ff3d958772e32b90e89fbaa42fa2253084916ce97397ec855d05381219df2ec4", kill_on_drop: false }`
[INFO] [stderr]    Compiling ein-ffi v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "ff3d958772e32b90e89fbaa42fa2253084916ce97397ec855d05381219df2ec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff3d958772e32b90e89fbaa42fa2253084916ce97397ec855d05381219df2ec4", kill_on_drop: false }`
[INFO] [stdout] ff3d958772e32b90e89fbaa42fa2253084916ce97397ec855d05381219df2ec4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.77.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e29d92651d2a4898438ed5a5e54936f7a1b78134d5bb9ef435b6442c78b43647
[INFO] running `Command { std: "docker" "start" "-a" "e29d92651d2a4898438ed5a5e54936f7a1b78134d5bb9ef435b6442c78b43647", kill_on_drop: false }`
[INFO] [stderr]    Compiling ein-ffi v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `from` that must be used
[INFO] [stdout]    --> src/arc/arc_buffer.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |         ArcBuffer::from(vec![0u8; 42].as_slice());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let _ = ArcBuffer::from(vec![0u8; 42].as_slice());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `from` that must be used
[INFO] [stdout]    --> src/arc/arc_buffer.rs:119:9
[INFO] [stdout]     |
[INFO] [stdout] 119 |         ArcBuffer::from("hello".as_bytes());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 119 |         let _ = ArcBuffer::from("hello".as_bytes());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "e29d92651d2a4898438ed5a5e54936f7a1b78134d5bb9ef435b6442c78b43647", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e29d92651d2a4898438ed5a5e54936f7a1b78134d5bb9ef435b6442c78b43647", kill_on_drop: false }`
[INFO] [stdout] e29d92651d2a4898438ed5a5e54936f7a1b78134d5bb9ef435b6442c78b43647
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.77.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 77e40fa5ef03f7062bbb0df8ab327fa712213a0d385dff5daadf9afc9194037a
[INFO] running `Command { std: "docker" "start" "-a" "77e40fa5ef03f7062bbb0df8ab327fa712213a0d385dff5daadf9afc9194037a", kill_on_drop: false }`
[INFO] [stderr] warning: unused return value of `from` that must be used
[INFO] [stderr]    --> src/arc/arc_buffer.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |         ArcBuffer::from(vec![0u8; 42].as_slice());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let _ = ArcBuffer::from(vec![0u8; 42].as_slice());
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `from` that must be used
[INFO] [stderr]    --> src/arc/arc_buffer.rs:119:9
[INFO] [stderr]     |
[INFO] [stderr] 119 |         ArcBuffer::from("hello".as_bytes());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 119 |         let _ = ArcBuffer::from("hello".as_bytes());
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `ein-ffi` (lib test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ein_ffi-eae057d10cc4ad04)
[INFO] [stdout] 
[INFO] [stdout] running 24 tests
[INFO] [stdout] test arc::arc_block::tests::create ... ok
[INFO] [stdout] test arc::arc_block::tests::create_null ... ok
[INFO] [stdout] test arc::arc_block::tests::drop ... ok
[INFO] [stdout] test arc::arc_block::tests::drop_twice ... ok
[INFO] [stdout] test arc::arc_block::tests::clone ... ok
[INFO] [stdout] test arc::arc_buffer::tests::clone ... ok
[INFO] [stdout] test arc::arc_buffer::tests::convert_from_string ... ok
[INFO] [stdout] test arc::arc_buffer::tests::convert_from_vec ... ok
[INFO] [stdout] test arc::arc_buffer::tests::create_buffer ... ok
[INFO] [stdout] test arc::tests::clone ... ok
[INFO] [stdout] test arc::arc_buffer::tests::create_zero_sized_buffer ... ok
[INFO] [stdout] test arc::tests::zero_sized::create ... ok
[INFO] [stdout] test arc::tests::zero_sized::clone ... ok
[INFO] [stdout] test arc::tests::create ... ok
[INFO] [stdout] test string::tests::slice_into_whole ... ok
[INFO] [stdout] test string::tests::slice_last_with_emojis ... ok
[INFO] [stdout] test string::tests::slice_with_ascii ... ok
[INFO] [stdout] test string::tests::slice_with_emojis ... ok
[INFO] [stdout] test string::tests::join ... ok
[INFO] [stdout] test arc::tests::zero_sized::load_payload ... ok
[INFO] [stdout] test arc::tests::load_payload ... ok
[INFO] [stdout] test string::tests::join_empty ... ok
[INFO] [stdout] test string::tests::slice_with_negative_index ... ok
[INFO] [stdout] test string::tests::slice_into_empty ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 24 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ein-ffi
[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" "77e40fa5ef03f7062bbb0df8ab327fa712213a0d385dff5daadf9afc9194037a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77e40fa5ef03f7062bbb0df8ab327fa712213a0d385dff5daadf9afc9194037a", kill_on_drop: false }`
[INFO] [stdout] 77e40fa5ef03f7062bbb0df8ab327fa712213a0d385dff5daadf9afc9194037a