[INFO] fetching crate linked-tail-list 0.0.1...
[INFO] testing linked-tail-list-0.0.1 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate linked-tail-list 0.0.1 into /workspace/builds/worker-49/source
[INFO] validating manifest of crates.io crate linked-tail-list 0.0.1 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate linked-tail-list 0.0.1
[INFO] finished tweaking crates.io crate linked-tail-list 0.0.1
[INFO] tweaked toml for crates.io crate linked-tail-list 0.0.1 written to /workspace/builds/worker-49/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eeab9e345490e6889857aadaebd93f89f400319e37a0b608266d694be65a3904
[INFO] running `Command { std: "docker" "start" "-a" "eeab9e345490e6889857aadaebd93f89f400319e37a0b608266d694be65a3904", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eeab9e345490e6889857aadaebd93f89f400319e37a0b608266d694be65a3904", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeab9e345490e6889857aadaebd93f89f400319e37a0b608266d694be65a3904", kill_on_drop: false }`
[INFO] [stdout] eeab9e345490e6889857aadaebd93f89f400319e37a0b608266d694be65a3904
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 293455ae6e4841d0983b18d3e23910b1bea8f67c504c2d532cfc26bbbc1d97b5
[INFO] running `Command { std: "docker" "start" "-a" "293455ae6e4841d0983b18d3e23910b1bea8f67c504c2d532cfc26bbbc1d97b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling linked-tail-list v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:358:5
[INFO] [stdout]     |
[INFO] [stdout] 358 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "293455ae6e4841d0983b18d3e23910b1bea8f67c504c2d532cfc26bbbc1d97b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "293455ae6e4841d0983b18d3e23910b1bea8f67c504c2d532cfc26bbbc1d97b5", kill_on_drop: false }`
[INFO] [stdout] 293455ae6e4841d0983b18d3e23910b1bea8f67c504c2d532cfc26bbbc1d97b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a16f3b6b84ced2a2dfcd09f9c676bcf3909fe3d1577105bbae68ed3a5212f84
[INFO] running `Command { std: "docker" "start" "-a" "3a16f3b6b84ced2a2dfcd09f9c676bcf3909fe3d1577105bbae68ed3a5212f84", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:358:5
[INFO] [stdout]     |
[INFO] [stdout] 358 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling linked-tail-list v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:358:5
[INFO] [stdout]     |
[INFO] [stdout] 358 |     unsafe {
[INFO] [stdout]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "3a16f3b6b84ced2a2dfcd09f9c676bcf3909fe3d1577105bbae68ed3a5212f84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a16f3b6b84ced2a2dfcd09f9c676bcf3909fe3d1577105bbae68ed3a5212f84", kill_on_drop: false }`
[INFO] [stdout] 3a16f3b6b84ced2a2dfcd09f9c676bcf3909fe3d1577105bbae68ed3a5212f84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 43823e03eafa97500ce7a67e06e8fdcaa260c393e7779f3417221fb3a09c1bd1
[INFO] running `Command { std: "docker" "start" "-a" "43823e03eafa97500ce7a67e06e8fdcaa260c393e7779f3417221fb3a09c1bd1", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/lib.rs:358:5
[INFO] [stderr]     |
[INFO] [stderr] 358 |     unsafe {
[INFO] [stderr]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `linked-tail-list` (lib) generated 1 warning
[INFO] [stderr] warning: `linked-tail-list` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/linked_tail_list-b3ca8579d43fae75)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tests::it_swaps_places ... ok
[INFO] [stdout] test tests::remove_tail ... ok
[INFO] [stdout] test tests::remove_all_iter ... ok
[INFO] [stdout] test tests::remove_mark_alternate ... ok
[INFO] [stdout] test tests::mark_all ... ok
[INFO] [stdout] test tests::iter_insert ... ok
[INFO] [stdout] test tests::fill_and_drop ... ok
[INFO] [stdout] test tests::fill_and_iter ... ok
[INFO] [stdout] test tests::iter_tail ... ok
[INFO] [stdout] test tests::iter_into_tail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.82s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests linked-tail-list
[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] running `Command { std: "docker" "inspect" "43823e03eafa97500ce7a67e06e8fdcaa260c393e7779f3417221fb3a09c1bd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43823e03eafa97500ce7a67e06e8fdcaa260c393e7779f3417221fb3a09c1bd1", kill_on_drop: false }`
[INFO] [stdout] 43823e03eafa97500ce7a67e06e8fdcaa260c393e7779f3417221fb3a09c1bd1