[INFO] cloning repository https://github.com/mozilla/grcov
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mozilla/grcov" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmozilla%2Fgrcov", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmozilla%2Fgrcov'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f3849045200d35f079169674b443ae0c9d2bf9f
[INFO] checking mozilla/grcov against beta-2021-10-15 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmozilla%2Fgrcov" "/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/mozilla/grcov on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking git repo https://github.com/mozilla/grcov
[INFO] finished tweaking git repo https://github.com/mozilla/grcov
[INFO] tweaked toml for git repo https://github.com/mozilla/grcov written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/mozilla/grcov already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "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-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" "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" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bdef96e5acbbde34fcb2a531000c567c543529954b6714cdadd4b6c58671a501
[INFO] running `Command { std: "docker" "start" "-a" "bdef96e5acbbde34fcb2a531000c567c543529954b6714cdadd4b6c58671a501", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdef96e5acbbde34fcb2a531000c567c543529954b6714cdadd4b6c58671a501", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdef96e5acbbde34fcb2a531000c567c543529954b6714cdadd4b6c58671a501", kill_on_drop: false }`
[INFO] [stdout] bdef96e5acbbde34fcb2a531000c567c543529954b6714cdadd4b6c58671a501
[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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d94a24e3b3496110030fbf859553b5835514e0a5d797718fc6fe5c58743f65e0
[INFO] running `Command { std: "docker" "start" "-a" "d94a24e3b3496110030fbf859553b5835514e0a5d797718fc6fe5c58743f65e0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.2
[INFO] [stderr]    Compiling anyhow v1.0.41
[INFO] [stderr]    Compiling symbolic-demangle v8.3.0
[INFO] [stderr]     Checking deunicode v0.4.3
[INFO] [stderr]     Checking ucd-trie v0.1.3
[INFO] [stderr]     Checking humansize v1.1.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking is_executable v1.0.1
[INFO] [stderr]     Checking fomat-macros v0.3.1
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling cpp_demangle v0.3.2
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking memchr v2.4.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]     Checking msvc-demangler v0.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling parse-zoneinfo v0.3.0
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[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=bff4d38767299e23 -C extra-filename=-bff4d38767299e23 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e476eeba35620bc2.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-7cec808d916b2240.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-11d097b41f2e60a4.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (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" "d94a24e3b3496110030fbf859553b5835514e0a5d797718fc6fe5c58743f65e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d94a24e3b3496110030fbf859553b5835514e0a5d797718fc6fe5c58743f65e0", kill_on_drop: false }`
[INFO] [stdout] d94a24e3b3496110030fbf859553b5835514e0a5d797718fc6fe5c58743f65e0
