[INFO] fetching crate optional-field 0.1.2...
[INFO] testing optional-field-0.1.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate optional-field 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate optional-field 0.1.2 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 optional-field 0.1.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate optional-field 0.1.2
[INFO] tweaked toml for crates.io crate optional-field 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 60249d0de5d7cb06a1fc28dd444905894e9f9fc5b50eda5481ec018b7ede48ca
[INFO] running `Command { std: "docker" "start" "-a" "60249d0de5d7cb06a1fc28dd444905894e9f9fc5b50eda5481ec018b7ede48ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60249d0de5d7cb06a1fc28dd444905894e9f9fc5b50eda5481ec018b7ede48ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60249d0de5d7cb06a1fc28dd444905894e9f9fc5b50eda5481ec018b7ede48ca", kill_on_drop: false }`
[INFO] [stdout] 60249d0de5d7cb06a1fc28dd444905894e9f9fc5b50eda5481ec018b7ede48ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 2da87bff3159fcc03e192e63b8985bd8fc67c922fc78a8939ca6fcaff5774b37
[INFO] running `Command { std: "docker" "start" "-a" "2da87bff3159fcc03e192e63b8985bd8fc67c922fc78a8939ca6fcaff5774b37", kill_on_drop: false }`
[INFO] [stderr]    Compiling optional-fields-serde-macro v0.1.0
[INFO] [stderr]    Compiling optional-field v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.75s
[INFO] running `Command { std: "docker" "inspect" "2da87bff3159fcc03e192e63b8985bd8fc67c922fc78a8939ca6fcaff5774b37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2da87bff3159fcc03e192e63b8985bd8fc67c922fc78a8939ca6fcaff5774b37", kill_on_drop: false }`
[INFO] [stdout] 2da87bff3159fcc03e192e63b8985bd8fc67c922fc78a8939ca6fcaff5774b37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] a0dc93e5194b121e547220226608760c2e7fdebacfef6a731127ba2e09d14664
[INFO] running `Command { std: "docker" "start" "-a" "a0dc93e5194b121e547220226608760c2e7fdebacfef6a731127ba2e09d14664", kill_on_drop: false }`
[INFO] [stderr]    Compiling optional-field v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "a0dc93e5194b121e547220226608760c2e7fdebacfef6a731127ba2e09d14664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0dc93e5194b121e547220226608760c2e7fdebacfef6a731127ba2e09d14664", kill_on_drop: false }`
[INFO] [stdout] a0dc93e5194b121e547220226608760c2e7fdebacfef6a731127ba2e09d14664
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] e172b54aad4bc62a76ba612c86f67144426a19e649159bb575ce5aad84bb724a
[INFO] running `Command { std: "docker" "start" "-a" "e172b54aad4bc62a76ba612c86f67144426a19e649159bb575ce5aad84bb724a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/optional_field-24a21af7133c158d)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running tests/serde.rs (/opt/rustwide/target/debug/deps/serde-80854b202e3f14b6)
[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] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test deserialize_null ... ok
[INFO] [stdout] test deserialize_value ... ok
[INFO] [stdout] test serialize_value ... ok
[INFO] [stdout] test serialize_null ... ok
[INFO] [stdout] test deserialize_missing ... ok
[INFO] [stderr]    Doc-tests optional-field
[INFO] [stdout] test serialize_missing ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap_present_or_else (line 401) ... ok
[INFO] [stdout] test src/lib.rs - Field<&'_ T>::copied (line 546) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::is_missing (line 21) ... ok
[INFO] [stdout] test src/lib.rs - Field<&'_ T>::cloned (line 583) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::as_mut (line 114) ... ok
[INFO] [stdout] test src/lib.rs - Field<&'_ mut T>::cloned (line 601) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap_present_or (line 366) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::contains (line 63) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::map (line 140) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::as_ref (line 93) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::delta (line 669) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::has_value (line 49) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::is_present (line 35) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::map_present_or_else (line 262) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap_or (line 349) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap (line 298) ... ok
[INFO] [stdout] test src/lib.rs - Field<&'_ mut T>::copied (line 565) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap_or_else (line 383) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::map_or_else (line 238) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::expect_present (line 456) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap (line 292) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::map_present (line 164) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap_present (line 327) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::as_deref (line 622) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::expect_present (line 450) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::unwrap_present (line 321) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::expect (line 423) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::expect (line 429) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::map_present_or (line 213) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::as_deref_mut (line 643) ... ok
[INFO] [stdout] test src/lib.rs - Field<T>::map_or (line 191) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.55s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e172b54aad4bc62a76ba612c86f67144426a19e649159bb575ce5aad84bb724a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e172b54aad4bc62a76ba612c86f67144426a19e649159bb575ce5aad84bb724a", kill_on_drop: false }`
[INFO] [stdout] e172b54aad4bc62a76ba612c86f67144426a19e649159bb575ce5aad84bb724a