[INFO] fetching crate bibtex 0.0.1...
[INFO] checking bibtex-0.0.1 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate bibtex 0.0.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate bibtex 0.0.1 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate bibtex 0.0.1
[INFO] finished tweaking crates.io crate bibtex 0.0.1
[INFO] tweaked toml for crates.io crate bibtex 0.0.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f15be30513d1991a1b903aeddfd74ec445c02c32460a91411f0ff7a4edb595e3
[INFO] running `"docker" "start" "-a" "f15be30513d1991a1b903aeddfd74ec445c02c32460a91411f0ff7a4edb595e3"`
[INFO] [stderr]     Checking bibtex v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `cite_key`
[INFO] [stderr]   --> src/entry.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn cite_key(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `entry_type`
[INFO] [stderr]   --> src/entry.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn entry_type(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `field`
[INFO] [stderr]   --> src/entry.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn field(&self, field: &str) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cite_key`
[INFO] [stderr]   --> src/entry.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn cite_key(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `entry_type`
[INFO] [stderr]   --> src/entry.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn entry_type(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `field`
[INFO] [stderr]   --> src/entry.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn field(&self, field: &str) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "f15be30513d1991a1b903aeddfd74ec445c02c32460a91411f0ff7a4edb595e3"`
[INFO] running `"docker" "rm" "-f" "f15be30513d1991a1b903aeddfd74ec445c02c32460a91411f0ff7a4edb595e3"`
[INFO] [stdout] f15be30513d1991a1b903aeddfd74ec445c02c32460a91411f0ff7a4edb595e3