[INFO] fetching crate singleton-trait 0.4.0...
[INFO] testing singleton-trait-0.4.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2
[INFO] extracting crate singleton-trait 0.4.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate singleton-trait 0.4.0
[INFO] finished tweaking crates.io crate singleton-trait 0.4.0
[INFO] tweaked toml for crates.io crate singleton-trait 0.4.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate singleton-trait 0.4.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate singleton-trait 0.4.0 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20f2277fb786e0fac18c1e40d5097802a7135db659476fd71eb08ccad83511c4
[INFO] running `Command { std: "docker" "start" "-a" "20f2277fb786e0fac18c1e40d5097802a7135db659476fd71eb08ccad83511c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20f2277fb786e0fac18c1e40d5097802a7135db659476fd71eb08ccad83511c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20f2277fb786e0fac18c1e40d5097802a7135db659476fd71eb08ccad83511c4", kill_on_drop: false }`
[INFO] [stdout] 20f2277fb786e0fac18c1e40d5097802a7135db659476fd71eb08ccad83511c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5bc94243aedb5b42ac932ce2b5a2f97f5b3cc093bc0525c756b07b40546ae57
[INFO] running `Command { std: "docker" "start" "-a" "f5bc94243aedb5b42ac932ce2b5a2f97f5b3cc093bc0525c756b07b40546ae57", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-trait v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "f5bc94243aedb5b42ac932ce2b5a2f97f5b3cc093bc0525c756b07b40546ae57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5bc94243aedb5b42ac932ce2b5a2f97f5b3cc093bc0525c756b07b40546ae57", kill_on_drop: false }`
[INFO] [stdout] f5bc94243aedb5b42ac932ce2b5a2f97f5b3cc093bc0525c756b07b40546ae57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba86b7201210f4819eeb10295fc07019e1d8f72f78c2c2858f0c2949a4d0afb5
[INFO] running `Command { std: "docker" "start" "-a" "ba86b7201210f4819eeb10295fc07019e1d8f72f78c2c2858f0c2949a4d0afb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-trait v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]    --> src/lib.rs:448:61
[INFO] [stdout]     |
[INFO] [stdout] 448 |         struct Guard<'a>(PhantomData<fn(&'a ()) -> &'a ()>, &'a NonCopy);
[INFO] [stdout]     |                ----- field in this struct                   ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "ba86b7201210f4819eeb10295fc07019e1d8f72f78c2c2858f0c2949a4d0afb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba86b7201210f4819eeb10295fc07019e1d8f72f78c2c2858f0c2949a4d0afb5", kill_on_drop: false }`
[INFO] [stdout] ba86b7201210f4819eeb10295fc07019e1d8f72f78c2c2858f0c2949a4d0afb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4638a1af9f4aeeafb1d898c57ba48a4f9f6d337dba95d5ca375bd957625ee1a9
[INFO] running `Command { std: "docker" "start" "-a" "4638a1af9f4aeeafb1d898c57ba48a4f9f6d337dba95d5ca375bd957625ee1a9", kill_on_drop: false }`
[INFO] [stderr] warning: field `1` is never read
[INFO] [stdout] 
[INFO] [stderr]    --> src/lib.rs:448:61
[INFO] [stdout] running 1 test
[INFO] [stderr]     |
[INFO] [stdout] test tests::test_impls ... ok
[INFO] [stderr] 448 |         struct Guard<'a>(PhantomData<fn(&'a ()) -> &'a ()>, &'a NonCopy);
[INFO] [stdout] 
[INFO] [stderr]     |                ----- field in this struct                   ^^^^^^^^^^^
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr]     = help: consider removing this field
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `singleton-trait` (lib test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/singleton_trait-8d945906fb571491)
[INFO] [stderr]    Doc-tests singleton_trait
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - Erased<T>::borrow_mut (line 185) ... ok
[INFO] [stdout] test src/lib.rs - Erased<&'amutT>::read (line 324) ... ok
[INFO] [stdout] test src/lib.rs - Erased<&'amutT>::into_shared (line 351) ... ok
[INFO] [stdout] test src/lib.rs - Erased<T>::borrow (line 162) ... ok
[INFO] [stdout] test src/lib.rs - Erased<&'amutT>::reborrow (line 301) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.53s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4638a1af9f4aeeafb1d898c57ba48a4f9f6d337dba95d5ca375bd957625ee1a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4638a1af9f4aeeafb1d898c57ba48a4f9f6d337dba95d5ca375bd957625ee1a9", kill_on_drop: false }`
[INFO] [stdout] 4638a1af9f4aeeafb1d898c57ba48a4f9f6d337dba95d5ca375bd957625ee1a9