[INFO] updating cached repository https://github.com/hobofan/extract-references
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7ebc8d272517e0bc07a043fbb79cf819c1e03f92
[INFO] checking hobofan/extract-references against master#c724b67e1b474262917a5154d74e7072267593fe for pr-74315
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhobofan%2Fextract-references" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hobofan/extract-references on toolchain c724b67e1b474262917a5154d74e7072267593fe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hobofan/extract-references
[INFO] finished tweaking git repo https://github.com/hobofan/extract-references
[INFO] tweaked toml for git repo https://github.com/hobofan/extract-references written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/hobofan/extract-references already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b9e0b81419a9414753f8cbdf07645655e70e450de2a1b9e157144c9a2577128
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2b9e0b81419a9414753f8cbdf07645655e70e450de2a1b9e157144c9a2577128", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b9e0b81419a9414753f8cbdf07645655e70e450de2a1b9e157144c9a2577128", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b9e0b81419a9414753f8cbdf07645655e70e450de2a1b9e157144c9a2577128", kill_on_drop: false }`
[INFO] [stdout] 2b9e0b81419a9414753f8cbdf07645655e70e450de2a1b9e157144c9a2577128
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94b709ad14e3d18201e71cddd4c31ff2f158c0c8fc24eaf80d74c2244c521200
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "94b709ad14e3d18201e71cddd4c31ff2f158c0c8fc24eaf80d74c2244c521200", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]     Checking pom v1.1.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking postscript v0.11.1
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]     Checking encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]     Checking encoding-index-japanese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking deflate v0.7.19
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking gif v0.10.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking adobe-cmap-parser v0.3.3
[INFO] [stderr]     Checking type1-encoding-parser v0.1.0
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking euclid v0.15.6
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]     Checking encoding v0.2.33
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking num_cpus v1.10.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking flate2 v1.0.6
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]     Checking lopdf v0.19.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling num-derive v0.2.4
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking lopdf v0.15.3
[INFO] [stderr]     Checking pdf-extract v0.4.6
[INFO] [stderr]     Checking extract-references v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `reference_item_pattern`
[INFO] [stdout]   --> src/raw_text.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn reference_item_pattern(&self) -> Option<Regex> {
[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: `references`
[INFO] [stdout]   --> src/raw_text.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn references(&self) -> Option<Vec<Reference>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.87s
[INFO] running `Command { std: "docker" "inspect" "94b709ad14e3d18201e71cddd4c31ff2f158c0c8fc24eaf80d74c2244c521200", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94b709ad14e3d18201e71cddd4c31ff2f158c0c8fc24eaf80d74c2244c521200", kill_on_drop: false }`
[INFO] [stdout] 94b709ad14e3d18201e71cddd4c31ff2f158c0c8fc24eaf80d74c2244c521200