[INFO] fetching crate better_btree 0.2.3...
[INFO] checking better_btree-0.2.3 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate better_btree 0.2.3 into /workspace/builds/worker-110/source
[INFO] validating manifest of crates.io crate better_btree 0.2.3 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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-110/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2452e9dd01290a31e7a65721d8d864dcc4ddad378a940d14f4d04751bf31495d
[INFO] running `Command { std: "docker" "start" "-a" "2452e9dd01290a31e7a65721d8d864dcc4ddad378a940d14f4d04751bf31495d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2452e9dd01290a31e7a65721d8d864dcc4ddad378a940d14f4d04751bf31495d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2452e9dd01290a31e7a65721d8d864dcc4ddad378a940d14f4d04751bf31495d", kill_on_drop: false }`
[INFO] [stdout] 2452e9dd01290a31e7a65721d8d864dcc4ddad378a940d14f4d04751bf31495d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 625ac941abcff75d12bb679e0521eee49eaec51eb05ad9ebf9151d7a64c2c2b9
[INFO] running `Command { std: "docker" "start" "-a" "625ac941abcff75d12bb679e0521eee49eaec51eb05ad9ebf9151d7a64c2c2b9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking 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] [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 1.99s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "625ac941abcff75d12bb679e0521eee49eaec51eb05ad9ebf9151d7a64c2c2b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "625ac941abcff75d12bb679e0521eee49eaec51eb05ad9ebf9151d7a64c2c2b9", kill_on_drop: false }`
[INFO] [stdout] 625ac941abcff75d12bb679e0521eee49eaec51eb05ad9ebf9151d7a64c2c2b9