[INFO] fetching crate singly_linked_list 0.1.0...
[INFO] testing singly_linked_list-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate singly_linked_list 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate singly_linked_list 0.1.0
[INFO] finished tweaking crates.io crate singly_linked_list 0.1.0
[INFO] tweaked toml for crates.io crate singly_linked_list 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate singly_linked_list 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e9116f01d1b7bb745e034f337f6e1a16c739764cafc04f8297a8ce2473aaa0c
[INFO] running `Command { std: "docker" "start" "-a" "8e9116f01d1b7bb745e034f337f6e1a16c739764cafc04f8297a8ce2473aaa0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e9116f01d1b7bb745e034f337f6e1a16c739764cafc04f8297a8ce2473aaa0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e9116f01d1b7bb745e034f337f6e1a16c739764cafc04f8297a8ce2473aaa0c", kill_on_drop: false }`
[INFO] [stdout] 8e9116f01d1b7bb745e034f337f6e1a16c739764cafc04f8297a8ce2473aaa0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3242944c5fbd3d7db2f1efea7335c2bbf329cc627414fe31ba84f1388037ba45
[INFO] running `Command { std: "docker" "start" "-a" "3242944c5fbd3d7db2f1efea7335c2bbf329cc627414fe31ba84f1388037ba45", kill_on_drop: false }`
[INFO] [stderr]    Compiling singly_linked_list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "3242944c5fbd3d7db2f1efea7335c2bbf329cc627414fe31ba84f1388037ba45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3242944c5fbd3d7db2f1efea7335c2bbf329cc627414fe31ba84f1388037ba45", kill_on_drop: false }`
[INFO] [stdout] 3242944c5fbd3d7db2f1efea7335c2bbf329cc627414fe31ba84f1388037ba45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69e16c62f0bd5727781903a34da84c684f73478abf1e08a5e19083f3e630d47d
[INFO] running `Command { std: "docker" "start" "-a" "69e16c62f0bd5727781903a34da84c684f73478abf1e08a5e19083f3e630d47d", kill_on_drop: false }`
[INFO] [stderr]    Compiling singly_linked_list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "69e16c62f0bd5727781903a34da84c684f73478abf1e08a5e19083f3e630d47d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69e16c62f0bd5727781903a34da84c684f73478abf1e08a5e19083f3e630d47d", kill_on_drop: false }`
[INFO] [stdout] 69e16c62f0bd5727781903a34da84c684f73478abf1e08a5e19083f3e630d47d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8dc994ece431a288684d39c98cb564dce03f255bccc0c0a1943b268dcd7569e9
[INFO] running `Command { std: "docker" "start" "-a" "8dc994ece431a288684d39c98cb564dce03f255bccc0c0a1943b268dcd7569e9", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/singly_linked_list-4e59082555784e3e)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stderr]    Doc-tests singly_linked_list
[INFO] [stdout] test tests::test_empty_list ... ok
[INFO] [stdout] test tests::test_list_with_multiple_values ... ok
[INFO] [stdout] test tests::test_list_with_one_value ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - List<T>::traverse (line 73) ... ok
[INFO] [stdout] test src/lib.rs - List<T>::add_item (line 42) ... ok
[INFO] [stdout] test src/lib.rs - List<T>::new (line 24) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.49s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8dc994ece431a288684d39c98cb564dce03f255bccc0c0a1943b268dcd7569e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dc994ece431a288684d39c98cb564dce03f255bccc0c0a1943b268dcd7569e9", kill_on_drop: false }`
[INFO] [stdout] 8dc994ece431a288684d39c98cb564dce03f255bccc0c0a1943b268dcd7569e9