[INFO] fetching crate is_empty 0.3.0...
[INFO] testing is_empty-0.3.0 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate is_empty 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate is_empty 0.3.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate is_empty 0.3.0
[INFO] tweaked toml for crates.io crate is_empty 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate is_empty 0.3.0 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ff8b58c9d7c81e95c652f3a2dc312d66cc3dda81b3a96ab17e2c17df7f52eaf
[INFO] running `Command { std: "docker" "start" "-a" "7ff8b58c9d7c81e95c652f3a2dc312d66cc3dda81b3a96ab17e2c17df7f52eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ff8b58c9d7c81e95c652f3a2dc312d66cc3dda81b3a96ab17e2c17df7f52eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ff8b58c9d7c81e95c652f3a2dc312d66cc3dda81b3a96ab17e2c17df7f52eaf", kill_on_drop: false }`
[INFO] [stdout] 7ff8b58c9d7c81e95c652f3a2dc312d66cc3dda81b3a96ab17e2c17df7f52eaf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02b40aae0f7cca8c2adab3d9ce870d3157a071db4a85243dc749ba8c37fd05aa
[INFO] running `Command { std: "docker" "start" "-a" "02b40aae0f7cca8c2adab3d9ce870d3157a071db4a85243dc749ba8c37fd05aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling is_empty_derive v0.1.0
[INFO] [stderr]    Compiling is_empty v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.56s
[INFO] running `Command { std: "docker" "inspect" "02b40aae0f7cca8c2adab3d9ce870d3157a071db4a85243dc749ba8c37fd05aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02b40aae0f7cca8c2adab3d9ce870d3157a071db4a85243dc749ba8c37fd05aa", kill_on_drop: false }`
[INFO] [stdout] 02b40aae0f7cca8c2adab3d9ce870d3157a071db4a85243dc749ba8c37fd05aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09654dccf8814a9c10932f844dbe0dcb537c89c044f5fce85e3d8da8d4cce176
[INFO] running `Command { std: "docker" "start" "-a" "09654dccf8814a9c10932f844dbe0dcb537c89c044f5fce85e3d8da8d4cce176", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling is_empty v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `is_option_really_empty`
[INFO] [stdout]  --> tests/option_wrapped.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use is_empty::{is_option_really_empty, IsEmpty};
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.33s
[INFO] running `Command { std: "docker" "inspect" "09654dccf8814a9c10932f844dbe0dcb537c89c044f5fce85e3d8da8d4cce176", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09654dccf8814a9c10932f844dbe0dcb537c89c044f5fce85e3d8da8d4cce176", kill_on_drop: false }`
[INFO] [stdout] 09654dccf8814a9c10932f844dbe0dcb537c89c044f5fce85e3d8da8d4cce176
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 29346a540fe35aed8463a5671e7dbac41c81114025e65b3d173ec82123292a6a
[INFO] running `Command { std: "docker" "start" "-a" "29346a540fe35aed8463a5671e7dbac41c81114025e65b3d173ec82123292a6a", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `is_option_really_empty`
[INFO] [stdout] 
[INFO] [stderr]  --> tests/option_wrapped.rs:1:16
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 1 | use is_empty::{is_option_really_empty, IsEmpty};
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |                ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `is_empty` (test "option_wrapped") generated 1 warning (run `cargo fix --test "option_wrapped"` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/is_empty-ae7efa59a4a3a8e8)
[INFO] [stderr]      Running tests/basic.rs (/opt/rustwide/target/debug/deps/basic-2c455cd485c65762)
[INFO] [stderr]      Running tests/is_empty_attr.rs (/opt/rustwide/target/debug/deps/is_empty_attr-3ea63b823392be79)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/option_wrapped.rs (/opt/rustwide/target/debug/deps/option_wrapped-5a3b0ee0ab357a15)
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_is_empty ... 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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_is_empty_for_vec_with_attr ... 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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_option_wrapped ... 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]      Running tests/std_impls.rs (/opt/rustwide/target/debug/deps/std_impls-b41482dae9af2d2a)
[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] [stderr]      Running tests/test_nested.rs (/opt/rustwide/target/debug/deps/test_nested-2ab57f652c12c0c9)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests is_empty
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_is_empty_nested ... 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] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] test src/lib.rs - (line 39) ... ok
[INFO] [stdout] test src/lib.rs - (line 58) ... ok
[INFO] [stdout] test src/lib.rs - (line 94) ... ok
[INFO] [stdout] test src/lib.rs - (line 4) ... ok
[INFO] [stdout] test src/lib.rs - (line 72) ... ok
[INFO] [stdout] test src/lib.rs - is_empty (line 151) ... ok
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.88s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "29346a540fe35aed8463a5671e7dbac41c81114025e65b3d173ec82123292a6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29346a540fe35aed8463a5671e7dbac41c81114025e65b3d173ec82123292a6a", kill_on_drop: false }`
[INFO] [stdout] 29346a540fe35aed8463a5671e7dbac41c81114025e65b3d173ec82123292a6a