[INFO] fetching crate mlc 0.14.3...
[INFO] checking mlc-0.14.3 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate mlc 0.14.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mlc 0.14.3 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mlc 0.14.3
[INFO] finished tweaking crates.io crate mlc 0.14.3
[INFO] tweaked toml for crates.io crate mlc 0.14.3 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate mlc 0.14.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e484bbc283167ae7cc60a9c21e9f5474866497564475354e40e4b5db3f05b6d8
[INFO] running `Command { std: "docker" "start" "-a" "e484bbc283167ae7cc60a9c21e9f5474866497564475354e40e4b5db3f05b6d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e484bbc283167ae7cc60a9c21e9f5474866497564475354e40e4b5db3f05b6d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e484bbc283167ae7cc60a9c21e9f5474866497564475354e40e4b5db3f05b6d8", kill_on_drop: false }`
[INFO] [stdout] e484bbc283167ae7cc60a9c21e9f5474866497564475354e40e4b5db3f05b6d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0cc62b72018b11562916a69451451e1d32ff5331dc97a9ee798d3929e5519e75
[INFO] running `Command { std: "docker" "start" "-a" "0cc62b72018b11562916a69451451e1d32ff5331dc97a9ee798d3929e5519e75", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling syn v1.0.62
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]    Compiling openssl v0.10.33
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling httparse v1.4.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]    Compiling encoding_rs v0.8.20
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking httpdate v1.0.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking plotters-backend v0.3.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]    Compiling ntest_proc_macro_helper v0.7.3
[INFO] [stderr]     Checking wildmatch v2.1.0
[INFO] [stderr]     Checking oorandom v11.1.0
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking form_urlencoded v1.0.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]     Checking tracing v0.1.25
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling openssl-src v111.14.0+1.1.1j
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking unicode-normalization v0.1.9
[INFO] [stderr]    Compiling openssl-sys v0.9.61
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking nb-connect v1.0.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.0
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking http-body v0.4.1
[INFO] [stderr]     Checking url v2.2.1
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking simplelog v0.10.0
[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-1.0.62/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=70fcb52283532ae1 -C extra-filename=-70fcb52283532ae1 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-94b32054a073f40c.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-f2cd40a7816bdb48.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-1256a373de2a2211.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" "0cc62b72018b11562916a69451451e1d32ff5331dc97a9ee798d3929e5519e75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cc62b72018b11562916a69451451e1d32ff5331dc97a9ee798d3929e5519e75", kill_on_drop: false }`
[INFO] [stdout] 0cc62b72018b11562916a69451451e1d32ff5331dc97a9ee798d3929e5519e75