[INFO] fetching crate better_btree 0.2.3...
[INFO] testing better_btree-0.2.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate better_btree 0.2.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate better_btree 0.2.3 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 better_btree 0.2.3
[INFO] finished tweaking crates.io crate better_btree 0.2.3
[INFO] tweaked toml for crates.io crate better_btree 0.2.3 written to /workspace/builds/worker-0/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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] de3a1f6382cce2b897d808c5724d2d191f81d6e9cc0aa4f9261a2ddfefa72e72
[INFO] running `Command { std: "docker" "start" "-a" "de3a1f6382cce2b897d808c5724d2d191f81d6e9cc0aa4f9261a2ddfefa72e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de3a1f6382cce2b897d808c5724d2d191f81d6e9cc0aa4f9261a2ddfefa72e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de3a1f6382cce2b897d808c5724d2d191f81d6e9cc0aa4f9261a2ddfefa72e72", kill_on_drop: false }`
[INFO] [stdout] de3a1f6382cce2b897d808c5724d2d191f81d6e9cc0aa4f9261a2ddfefa72e72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 9d0b033cdb872c04597fa6309aaa77795f50690af7cab53260e478c20031c45a
[INFO] running `Command { std: "docker" "start" "-a" "9d0b033cdb872c04597fa6309aaa77795f50690af7cab53260e478c20031c45a", kill_on_drop: false }`
[INFO] [stderr]    Compiling better_btree v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `is_internal`
[INFO] [stdout]    --> src/node.rs:352:9
[INFO] [stdout]     |
[INFO] [stdout] 352 |     pub fn is_internal(&self) -> bool { self.data.is_internal() }
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9d0b033cdb872c04597fa6309aaa77795f50690af7cab53260e478c20031c45a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d0b033cdb872c04597fa6309aaa77795f50690af7cab53260e478c20031c45a", kill_on_drop: false }`
[INFO] [stdout] 9d0b033cdb872c04597fa6309aaa77795f50690af7cab53260e478c20031c45a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 865dd71c996cec18dca71cc7a2616680e762d62190397c5364f3812f68b9da55
[INFO] running `Command { std: "docker" "start" "-a" "865dd71c996cec18dca71cc7a2616680e762d62190397c5364f3812f68b9da55", kill_on_drop: false }`
[INFO] [stdout] warning: associated function is never used: `is_internal`
[INFO] [stdout]    --> src/node.rs:352:9
[INFO] [stdout]     |
[INFO] [stdout] 352 |     pub fn is_internal(&self) -> bool { self.data.is_internal() }
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling better_btree v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_internal`
[INFO] [stdout]    --> src/node.rs:352:9
[INFO] [stdout]     |
[INFO] [stdout] 352 |     pub fn is_internal(&self) -> bool { self.data.is_internal() }
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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 0.76s
[INFO] running `Command { std: "docker" "inspect" "865dd71c996cec18dca71cc7a2616680e762d62190397c5364f3812f68b9da55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "865dd71c996cec18dca71cc7a2616680e762d62190397c5364f3812f68b9da55", kill_on_drop: false }`
[INFO] [stdout] 865dd71c996cec18dca71cc7a2616680e762d62190397c5364f3812f68b9da55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 488411b832a79c3dbdd3d1f2dfdc158bff8de90f3cb7a99aaf641d111185bc56
[INFO] running `Command { std: "docker" "start" "-a" "488411b832a79c3dbdd3d1f2dfdc158bff8de90f3cb7a99aaf641d111185bc56", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `is_internal`
[INFO] [stderr]    --> src/node.rs:352:9
[INFO] [stderr]     |
[INFO] [stderr] 352 |     pub fn is_internal(&self) -> bool { self.data.is_internal() }
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `better_btree` (lib) generated 1 warning
[INFO] [stderr] warning: `better_btree` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/better_btree-b9689a99ed75944e)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests better_btree
[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] [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" "488411b832a79c3dbdd3d1f2dfdc158bff8de90f3cb7a99aaf641d111185bc56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "488411b832a79c3dbdd3d1f2dfdc158bff8de90f3cb7a99aaf641d111185bc56", kill_on_drop: false }`
[INFO] [stdout] 488411b832a79c3dbdd3d1f2dfdc158bff8de90f3cb7a99aaf641d111185bc56