[INFO] fetching crate fasten 0.1.13...
[INFO] testing fasten-0.1.13 against 1.44.0 for beta-1.45-1
[INFO] extracting crate fasten 0.1.13 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate fasten 0.1.13 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate fasten 0.1.13
[INFO] finished tweaking crates.io crate fasten 0.1.13
[INFO] tweaked toml for crates.io crate fasten 0.1.13 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b375a3211d092ec246faa691e4512a362891e621026c8eecc24c5aa4635bd729
[INFO] running `"docker" "start" "-a" "b375a3211d092ec246faa691e4512a362891e621026c8eecc24c5aa4635bd729"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling owning_ref v0.2.4
[INFO] [stderr]    Compiling ucd-util v0.1.8
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling futures v0.1.29
[INFO] [stderr]    Compiling smallvec v0.3.4
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling parking_lot v0.3.8
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling multiqueue v0.3.2
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling statistical v0.1.1
[INFO] [stderr]    Compiling fasten v0.1.13 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/io/seq.rs:49:36
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn sanitize_id(id: &String) -> (String);
[INFO] [stderr]    |                                    ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/io/seq.rs:116:36
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn sanitize_id(id: &String) -> (String) {
[INFO] [stderr]     |                                    ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `fasten`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name fasten_combine src/bin/fasten_combine.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C debuginfo=2 -C metadata=8df5890f959329da -C extra-filename=-8df5890f959329da --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern fasten=/opt/rustwide/target/debug/deps/libfasten-a841023ad9b83ba7.rlib --extern getopts=/opt/rustwide/target/debug/deps/libgetopts-a5316197925d8f3d.rlib --extern multiqueue=/opt/rustwide/target/debug/deps/libmultiqueue-55aef6730f86cde2.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-bb807c742746e684.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-f0dd4047126543a0.rlib --extern statistical=/opt/rustwide/target/debug/deps/libstatistical-072d819cd2d64a06.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b375a3211d092ec246faa691e4512a362891e621026c8eecc24c5aa4635bd729"`
[INFO] running `"docker" "rm" "-f" "b375a3211d092ec246faa691e4512a362891e621026c8eecc24c5aa4635bd729"`
[INFO] [stdout] b375a3211d092ec246faa691e4512a362891e621026c8eecc24c5aa4635bd729