[INFO] fetching crate singleton-trait 0.3.0...
[INFO] testing singleton-trait-0.3.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate singleton-trait 0.3.0 into /workspace/builds/worker-91/source
[INFO] validating manifest of crates.io crate singleton-trait 0.3.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate singleton-trait 0.3.0
[INFO] finished tweaking crates.io crate singleton-trait 0.3.0
[INFO] tweaked toml for crates.io crate singleton-trait 0.3.0 written to /workspace/builds/worker-91/source/Cargo.toml
[INFO] crate crates.io crate singleton-trait 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aae786552666ae3c73fd08da47ace4d63b6ab3af497c4c0c636a683cc8a1c66e
[INFO] running `Command { std: "docker" "start" "-a" "aae786552666ae3c73fd08da47ace4d63b6ab3af497c4c0c636a683cc8a1c66e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aae786552666ae3c73fd08da47ace4d63b6ab3af497c4c0c636a683cc8a1c66e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aae786552666ae3c73fd08da47ace4d63b6ab3af497c4c0c636a683cc8a1c66e", kill_on_drop: false }`
[INFO] [stdout] aae786552666ae3c73fd08da47ace4d63b6ab3af497c4c0c636a683cc8a1c66e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ca1f2234170baf9457251286e694961ee174fb71662e51d16227a6cb876578d
[INFO] running `Command { std: "docker" "start" "-a" "7ca1f2234170baf9457251286e694961ee174fb71662e51d16227a6cb876578d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling singleton-trait v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "7ca1f2234170baf9457251286e694961ee174fb71662e51d16227a6cb876578d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ca1f2234170baf9457251286e694961ee174fb71662e51d16227a6cb876578d", kill_on_drop: false }`
[INFO] [stdout] 7ca1f2234170baf9457251286e694961ee174fb71662e51d16227a6cb876578d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93782e7655d7ca5a10af265b93b1b6fca6b8ae12c8434087522235c1f150bba5
[INFO] running `Command { std: "docker" "start" "-a" "93782e7655d7ca5a10af265b93b1b6fca6b8ae12c8434087522235c1f150bba5", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-trait v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "93782e7655d7ca5a10af265b93b1b6fca6b8ae12c8434087522235c1f150bba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93782e7655d7ca5a10af265b93b1b6fca6b8ae12c8434087522235c1f150bba5", kill_on_drop: false }`
[INFO] [stdout] 93782e7655d7ca5a10af265b93b1b6fca6b8ae12c8434087522235c1f150bba5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2880b6a28131024fd178822a6ec86e8d7fb9900a84923a1a19d37b5a71b36c2c
[INFO] running `Command { std: "docker" "start" "-a" "2880b6a28131024fd178822a6ec86e8d7fb9900a84923a1a19d37b5a71b36c2c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.57s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/singleton_trait-3884d86b4177b34f)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_impls ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests singleton-trait
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - Erased<&'a mut T>::reborrow (line 262) ... ok
[INFO] [stdout] test src/lib.rs - Erased<&'a mut T>::reborrow (line 272) ... ok
[INFO] [stdout] test src/lib.rs - Erased<&'a mut T>::into_shared (line 315) ... ok
[INFO] [stdout] test src/lib.rs - Erased<&'a mut T>::read (line 288) ... ok
[INFO] [stdout] test src/lib.rs - Erased<T>::borrow_mut (line 146) ... ok
[INFO] [stdout] test src/lib.rs - Erased<T>::borrow (line 123) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.34s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2880b6a28131024fd178822a6ec86e8d7fb9900a84923a1a19d37b5a71b36c2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2880b6a28131024fd178822a6ec86e8d7fb9900a84923a1a19d37b5a71b36c2c", kill_on_drop: false }`
[INFO] [stdout] 2880b6a28131024fd178822a6ec86e8d7fb9900a84923a1a19d37b5a71b36c2c