[INFO] fetching crate embedded-cv 0.1.0...
[INFO] checking embedded-cv-0.1.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate embedded-cv 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate embedded-cv 0.1.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate embedded-cv 0.1.0
[INFO] finished tweaking crates.io crate embedded-cv 0.1.0
[INFO] tweaked toml for crates.io crate embedded-cv 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45238a75bb0e033d9cf600db1844c59a07ec0f72cc99db86f61babf850db9641
[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" "45238a75bb0e033d9cf600db1844c59a07ec0f72cc99db86f61babf850db9641", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45238a75bb0e033d9cf600db1844c59a07ec0f72cc99db86f61babf850db9641", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45238a75bb0e033d9cf600db1844c59a07ec0f72cc99db86f61babf850db9641", kill_on_drop: false }`
[INFO] [stdout] 45238a75bb0e033d9cf600db1844c59a07ec0f72cc99db86f61babf850db9641
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f890dc3c618a7008afea6b46aac54cc2bad442a0fb9b0060397d9c8b34af88b
[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" "2f890dc3c618a7008afea6b46aac54cc2bad442a0fb9b0060397d9c8b34af88b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling gimli v0.24.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.20
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling openssl v0.10.35
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling openssl-probe v0.1.4
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling bindgen v0.50.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling if_rust_version v1.0.0
[INFO] [stderr]    Compiling curl v0.4.38
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking maybe-owned v0.3.4
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling try_from v0.3.2
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling itertools v0.6.5
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.5
[INFO] [stderr]    Compiling tinyvec v1.3.0
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling openssl-sys v0.9.65
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling curl-sys v0.4.44+curl-7.77.0
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]    Compiling bart v0.1.4
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling addr2line v0.15.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]     Checking png v0.15.3
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling socket2 v0.4.0
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling filetime v0.2.14
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling hyper v0.12.36
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling flate2 v1.0.20
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling tar v0.4.35
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling http v0.1.21
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling cpp_common v0.5.6
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.73/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=1ad56668ee651fca -C extra-filename=-1ad56668ee651fca --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-4fc7cd6531551569.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-222a78d45ac6a98c.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-38987aa89d2b0d41.rmeta --cap-lints allow --cap-lints=forbid` (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" "2f890dc3c618a7008afea6b46aac54cc2bad442a0fb9b0060397d9c8b34af88b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f890dc3c618a7008afea6b46aac54cc2bad442a0fb9b0060397d9c8b34af88b", kill_on_drop: false }`
[INFO] [stdout] 2f890dc3c618a7008afea6b46aac54cc2bad442a0fb9b0060397d9c8b34af88b