[INFO] fetching crate duet 0.2.0...
[INFO] testing duet-0.2.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate duet 0.2.0 into /workspace/builds/worker-17/source
[INFO] validating manifest of crates.io crate duet 0.2.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate duet 0.2.0
[INFO] finished tweaking crates.io crate duet 0.2.0
[INFO] tweaked toml for crates.io crate duet 0.2.0 written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate crates.io crate duet 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.75
[INFO] [stderr]   Downloaded value-bag v1.0.0-alpha.7
[INFO] [stderr]   Downloaded tracing-error v0.1.2
[INFO] [stderr]   Downloaded futures-task v0.3.16
[INFO] [stderr]   Downloaded tokio-util v0.6.8
[INFO] [stderr]   Downloaded zeroize v1.4.1
[INFO] [stderr]   Downloaded dialoguer v0.8.0
[INFO] [stderr]   Downloaded futures-executor v0.3.16
[INFO] [stderr]   Downloaded nix v0.22.1
[INFO] [stderr]   Downloaded addr2line v0.16.0
[INFO] [stderr]   Downloaded cargo-lock v7.0.1
[INFO] [stderr]   Downloaded async-recursion v0.3.2
[INFO] [stderr]   Downloaded tokio-macros v1.3.0
[INFO] [stderr]   Downloaded openssh v0.8.1
[INFO] [stderr]   Downloaded tracing-attributes v0.1.15
[INFO] [stderr]   Downloaded polling v2.1.0
[INFO] [stderr]   Downloaded color-spantrace v0.1.6
[INFO] [stderr]   Downloaded async-std v1.10.0
[INFO] [stderr]   Downloaded nix v0.20.1
[INFO] [stderr]   Downloaded unicode-bidi v0.3.6
[INFO] [stderr]   Downloaded tinyvec v1.4.0
[INFO] [stderr]   Downloaded socket2 v0.4.2
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.20
[INFO] [stderr]   Downloaded thread-id v3.3.0
[INFO] [stderr]   Downloaded unix_mode v0.1.2
[INFO] [stderr]   Downloaded async-lock v2.4.0
[INFO] [stderr]   Downloaded fastrand v1.5.0
[INFO] [stderr]   Downloaded shell-escape v0.1.5
[INFO] [stderr]   Downloaded shellexpand v2.1.0
[INFO] [stderr]   Downloaded tokio v1.10.0
[INFO] [stderr]   Downloaded gimli v0.25.0
[INFO] [stderr]   Downloaded libc v0.2.100
[INFO] [stderr]   Downloaded essrpc_macros v0.4.0
[INFO] [stderr]   Downloaded essrpc v0.4.1
[INFO] [stderr]   Downloaded fnmatch-regex v0.1.0
[INFO] [stderr]   Downloaded path-clean v0.1.0
[INFO] [stderr]   Downloaded simple-logging v2.0.2
[INFO] [stderr]   Downloaded tracing-core v0.1.19
[INFO] [stderr]   Downloaded futures-io v0.3.16
[INFO] [stderr]   Downloaded futures v0.3.16
[INFO] [stderr]   Downloaded parking_lot v0.11.1
[INFO] [stderr]   Downloaded pin-project-lite v0.2.7
[INFO] [stderr]   Downloaded tracing v0.1.26
[INFO] [stderr]   Downloaded async-trait v0.1.51
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.28
[INFO] [stderr]   Downloaded atomicwrites v0.3.0
[INFO] [stderr]   Downloaded blake2-rfc v0.2.18
[INFO] [stderr]   Downloaded byte-unit v4.0.12
[INFO] [stderr]   Downloaded built v0.5.1
[INFO] [stderr]   Downloaded object v0.26.1
[INFO] [stderr]   Downloaded backtrace v0.3.61
[INFO] [stderr]   Downloaded sharded-slab v0.1.3
[INFO] [stderr]   Downloaded futures-channel v0.3.16
[INFO] [stderr]   Downloaded futures-core v0.3.16
[INFO] [stderr]   Downloaded futures-macro v0.3.16
[INFO] [stderr]   Downloaded futures-sink v0.3.16
[INFO] [stderr]   Downloaded slab v0.4.4
[INFO] [stderr]   Downloaded futures-util v0.3.16
[INFO] [stderr]   Downloaded machine-uid v0.2.0
[INFO] [stderr]   Downloaded quit_macros v1.1.4
[INFO] [stderr]   Downloaded quit v1.1.4
[INFO] [stderr]   Downloaded text_io v0.1.9
[INFO] [stderr]   Downloaded filetime v0.2.15
[INFO] [stderr]   Downloaded pico-args v0.4.2
[INFO] [stderr]   Downloaded ctor v0.1.21
[INFO] [stderr]   Downloaded lock_api v0.4.4
[INFO] [stderr]   Downloaded parking_lot_core v0.8.3
[INFO] [stderr]   Downloaded mio v0.7.13
[INFO] [stderr]   Downloaded instant v0.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 995ebb04328cdb99b19ff6fd66bb0fd1b56a54135a3f9aa99b2db447da697c1a
[INFO] running `Command { std: "docker" "start" "-a" "995ebb04328cdb99b19ff6fd66bb0fd1b56a54135a3f9aa99b2db447da697c1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "995ebb04328cdb99b19ff6fd66bb0fd1b56a54135a3f9aa99b2db447da697c1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "995ebb04328cdb99b19ff6fd66bb0fd1b56a54135a3f9aa99b2db447da697c1a", kill_on_drop: false }`
[INFO] [stdout] 995ebb04328cdb99b19ff6fd66bb0fd1b56a54135a3f9aa99b2db447da697c1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c7803c0331422409218380b9b6b460d5b83b1f195f8cdae852dfd79dcc90a6f
[INFO] running `Command { std: "docker" "start" "-a" "8c7803c0331422409218380b9b6b460d5b83b1f195f8cdae852dfd79dcc90a6f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling futures-io v0.3.16
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling cache-padded v1.1.1
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling futures-sink v0.3.16
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling fastrand v1.5.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]    Compiling async-task v4.0.3
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling eyre v0.6.5
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling owo-colors v1.3.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.20
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling indenter v0.3.3
[INFO] [stderr]    Compiling shell-escape v0.1.5
[INFO] [stderr]    Compiling utf8-width v0.1.5
[INFO] [stderr]    Compiling quit_macros v1.1.4
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling zeroize v1.4.1
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling text_io v0.1.9
[INFO] [stderr]    Compiling pico-args v0.4.2
[INFO] [stderr]    Compiling unix_mode v0.1.2
[INFO] [stderr]    Compiling path-clean v0.1.0
[INFO] [stderr]    Compiling machine-uid v0.2.0
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.7
[INFO] [stderr]    Compiling tinyvec v1.4.0
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling sharded-slab v0.1.3
[INFO] [stderr]    Compiling object v0.26.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stderr]    Compiling byte-unit v4.0.12
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling async-lock v2.4.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling tokio v1.10.0
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling fnmatch-regex v0.1.0
[INFO] [stderr]    Compiling tracing-subscriber v0.2.20
[INFO] [stderr]    Compiling async-channel v1.6.1
[INFO] [stderr]    Compiling futures-lite v1.12.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling addr2line v0.16.0
[INFO] [stderr] error: could not compile `regex`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name regex --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-1.5.4/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="aho-corasick"' --cfg 'feature="default"' --cfg 'feature="memchr"' --cfg 'feature="perf"' --cfg 'feature="perf-cache"' --cfg 'feature="perf-dfa"' --cfg 'feature="perf-inline"' --cfg 'feature="perf-literal"' --cfg 'feature="std"' --cfg 'feature="unicode"' --cfg 'feature="unicode-age"' --cfg 'feature="unicode-bool"' --cfg 'feature="unicode-case"' --cfg 'feature="unicode-gencat"' --cfg 'feature="unicode-perl"' --cfg 'feature="unicode-script"' --cfg 'feature="unicode-segment"' -C metadata=a6f9a384a5e0ee04 -C extra-filename=-a6f9a384a5e0ee04 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern aho_corasick=/opt/rustwide/target/debug/deps/libaho_corasick-183b69152644db8a.rmeta --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-1331aa8962ea7f83.rmeta --extern regex_syntax=/opt/rustwide/target/debug/deps/libregex_syntax-71dab053db1b6952.rmeta --cap-lints allow --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 `Command { std: "docker" "inspect" "8c7803c0331422409218380b9b6b460d5b83b1f195f8cdae852dfd79dcc90a6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c7803c0331422409218380b9b6b460d5b83b1f195f8cdae852dfd79dcc90a6f", kill_on_drop: false }`
[INFO] [stdout] 8c7803c0331422409218380b9b6b460d5b83b1f195f8cdae852dfd79dcc90a6f