[INFO] fetching crate halfling 0.8.0...
[INFO] testing halfling-0.8.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate halfling 0.8.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate halfling 0.8.0
[INFO] finished tweaking crates.io crate halfling 0.8.0
[INFO] tweaked toml for crates.io crate halfling 0.8.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate halfling 0.8.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate halfling 0.8.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.39
[INFO] [stderr]   Downloaded proc-macro2 v1.0.94
[INFO] [stderr]   Downloaded syn v2.0.99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6084534510c7697d02268475d466a89880a5d733ee4a607057b41461f0130d93
[INFO] running `Command { std: "docker" "start" "-a" "6084534510c7697d02268475d466a89880a5d733ee4a607057b41461f0130d93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6084534510c7697d02268475d466a89880a5d733ee4a607057b41461f0130d93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6084534510c7697d02268475d466a89880a5d733ee4a607057b41461f0130d93", kill_on_drop: false }`
[INFO] [stdout] 6084534510c7697d02268475d466a89880a5d733ee4a607057b41461f0130d93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42b58c061261f6bb5443fc070e97e5baa60e8f7c6976543862f7d5d8bd82a770
[INFO] running `Command { std: "docker" "start" "-a" "42b58c061261f6bb5443fc070e97e5baa60e8f7c6976543862f7d5d8bd82a770", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling halfling v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]   --> src/internal.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |         unsafe { core::mem::transmute(int) }
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] help: replace this with
[INFO] [stdout]    |
[INFO] [stdout] 74 -         unsafe { core::mem::transmute(int) }
[INFO] [stdout] 74 +         unsafe { u8::cast_signed(int) }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.75s
[INFO] running `Command { std: "docker" "inspect" "42b58c061261f6bb5443fc070e97e5baa60e8f7c6976543862f7d5d8bd82a770", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42b58c061261f6bb5443fc070e97e5baa60e8f7c6976543862f7d5d8bd82a770", kill_on_drop: false }`
[INFO] [stdout] 42b58c061261f6bb5443fc070e97e5baa60e8f7c6976543862f7d5d8bd82a770
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fc0bde42f43cbfb0ca28513292f7c9aec59bf34809c572e9eb8dcd71ba209a8
[INFO] running `Command { std: "docker" "start" "-a" "6fc0bde42f43cbfb0ca28513292f7c9aec59bf34809c572e9eb8dcd71ba209a8", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]   --> src/internal.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |         unsafe { core::mem::transmute(int) }
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] help: replace this with
[INFO] [stdout]    |
[INFO] [stdout] 74 -         unsafe { core::mem::transmute(int) }
[INFO] [stdout] 74 +         unsafe { u8::cast_signed(int) }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling halfling v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]   --> src/internal.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |         unsafe { core::mem::transmute(int) }
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] help: replace this with
[INFO] [stdout]    |
[INFO] [stdout] 74 -         unsafe { core::mem::transmute(int) }
[INFO] [stdout] 74 +         unsafe { u8::cast_signed(int) }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "6fc0bde42f43cbfb0ca28513292f7c9aec59bf34809c572e9eb8dcd71ba209a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fc0bde42f43cbfb0ca28513292f7c9aec59bf34809c572e9eb8dcd71ba209a8", kill_on_drop: false }`
[INFO] [stdout] 6fc0bde42f43cbfb0ca28513292f7c9aec59bf34809c572e9eb8dcd71ba209a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f4a1f6a4abc3fa5e53d8d8ef1a020034d0bf958827a0c0e81a52ffccef187666
[INFO] running `Command { std: "docker" "start" "-a" "f4a1f6a4abc3fa5e53d8d8ef1a020034d0bf958827a0c0e81a52ffccef187666", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary transmute
[INFO] [stderr]   --> src/internal.rs:74:18
[INFO] [stderr]    |
[INFO] [stderr] 74 |         unsafe { core::mem::transmute(int) }
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stderr] help: replace this with
[INFO] [stderr]    |
[INFO] [stderr] 74 -         unsafe { core::mem::transmute(int) }
[INFO] [stderr] 74 +         unsafe { u8::cast_signed(int) }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `halfling` (lib) generated 1 warning (run `cargo fix --lib -p halfling` to apply 1 suggestion)
[INFO] [stderr] warning: `halfling` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/halfling-048710f8216daf70)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test tests::nibble_try_from_u8_is_correct ... ok
[INFO] [stdout] test tests::nibble_can_represent_u8_check_is_correct ... ok
[INFO] [stdout] test internal::tests::unsigned_nibble_value_to_signed_value_is_correct ... ok
[INFO] [stdout] test tests::representable_nibble_values_transmute_correctly ... ok
[INFO] [stdout] test tests::bitwise_not_produces_valid_nibbles ... ok
[INFO] [stdout] test tests::nibble_into_u8_is_correct ... ok
[INFO] [stdout] test internal::tests::unsigned_nibble_value_is_byte_width ... ok
[INFO] [stdout] test tests::shl_produces_correct_values ... ok
[INFO] [stdout] test tests::size_of_option_nibble_equals_size_of_nibble ... ok
[INFO] [stdout] test tests::unsafe_nibble_new_unchecked_is_valid_given_invariants ... ok
[INFO] [stdout] test tests::correct_nibbles_iteration_order ... ok
[INFO] [stdout] test tests::nibbles_constructor_apis_behave_correctly ... ok
[INFO] [stdout] test tests::shr_produces_correct_values ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests halfling
[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" "f4a1f6a4abc3fa5e53d8d8ef1a020034d0bf958827a0c0e81a52ffccef187666", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4a1f6a4abc3fa5e53d8d8ef1a020034d0bf958827a0c0e81a52ffccef187666", kill_on_drop: false }`
[INFO] [stdout] f4a1f6a4abc3fa5e53d8d8ef1a020034d0bf958827a0c0e81a52ffccef187666