[INFO] fetching crate mdoc 0.1.2...
[INFO] testing mdoc-0.1.2 against 1.60.0 for beta-1.61-1
[INFO] extracting crate mdoc 0.1.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate mdoc 0.1.2 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 mdoc 0.1.2
[INFO] finished tweaking crates.io crate mdoc 0.1.2
[INFO] tweaked toml for crates.io crate mdoc 0.1.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate mdoc 0.1.2 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]  Downloading crates ...
[INFO] [stderr]   Downloaded command-group v1.0.8
[INFO] [stderr]   Downloaded watchexec v1.17.1
[INFO] [stderr]   Downloaded zip v0.5.13
[INFO] [stderr]   Downloaded rustls v0.20.2
[INFO] [stderr]   Downloaded tectonic_xdv v0.1.12
[INFO] [stderr]   Downloaded tectonic_errors v0.2.0
[INFO] [stderr]   Downloaded ndk v0.4.0
[INFO] [stderr]   Downloaded app_dirs2 v2.3.3
[INFO] [stderr]   Downloaded byte-unit v4.0.13
[INFO] [stderr]   Downloaded utf8-width v0.1.5
[INFO] [stderr]   Downloaded openssl-sys v0.9.70
[INFO] [stderr]   Downloaded tectonic_bundles v0.2.0
[INFO] [stderr]   Downloaded tectonic_engine_bibtex v0.1.3
[INFO] [stderr]   Downloaded tectonic_engine_xdvipdfmx v0.1.3
[INFO] [stderr]   Downloaded clearscreen v1.0.7
[INFO] [stderr]   Downloaded tectonic_bridge_freetype2 v0.2.0
[INFO] [stderr]   Downloaded tectonic_dep_support v0.1.0
[INFO] [stderr]   Downloaded anyhow v1.0.45
[INFO] [stderr]   Downloaded tokio v1.14.0
[INFO] [stderr]   Downloaded terminfo v0.7.3
[INFO] [stderr]   Downloaded which v4.2.2
[INFO] [stderr]   Downloaded tectonic_bridge_flate v0.1.5
[INFO] [stderr]   Downloaded tectonic_status_base v0.2.0
[INFO] [stderr]   Downloaded tectonic_pdf_io v0.1.2
[INFO] [stderr]   Downloaded ndk-glue v0.4.0
[INFO] [stderr]   Downloaded xdg v2.4.0
[INFO] [stderr]   Downloaded tectonic_bridge_icu v0.2.0
[INFO] [stderr]   Downloaded webpki-roots v0.22.1
[INFO] [stderr]   Downloaded tectonic_bridge_core v0.3.0
[INFO] [stderr]   Downloaded tectonic_bridge_graphite2 v0.2.1
[INFO] [stderr]   Downloaded tectonic_xetex_layout v0.1.1
[INFO] [stderr]   Downloaded openssl-src v300.0.4+3.0.1
[INFO] [stderr]   Downloaded tectonic_geturl v0.3.0
[INFO] [stderr]   Downloaded tectonic_io_base v0.3.1
[INFO] [stderr]   Downloaded tectonic_cfg_support v0.1.3
[INFO] [stderr]   Downloaded tectonic_engine_xetex v0.1.4
[INFO] [stderr]   Downloaded tectonic_bridge_harfbuzz v0.2.3
[INFO] [stderr]   Downloaded tectonic v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aabdc6c48b2ccb18604f719e2745eed32cbf16dffb2e820c23273de4938281f0
[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" "aabdc6c48b2ccb18604f719e2745eed32cbf16dffb2e820c23273de4938281f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aabdc6c48b2ccb18604f719e2745eed32cbf16dffb2e820c23273de4938281f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aabdc6c48b2ccb18604f719e2745eed32cbf16dffb2e820c23273de4938281f0", kill_on_drop: false }`
[INFO] [stdout] aabdc6c48b2ccb18604f719e2745eed32cbf16dffb2e820c23273de4938281f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 68f551b3e9bc04b4898e64e89763d73067fa7cac59c1d80432112da83d18f404
[INFO] running `Command { std: "docker" "start" "-a" "68f551b3e9bc04b4898e64e89763d73067fa7cac59c1d80432112da83d18f404", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling anyhow v1.0.45
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling tectonic_bridge_flate v0.1.5
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling httpdate v1.0.1
[INFO] [stderr]    Compiling tectonic v0.8.0
[INFO] [stderr]    Compiling chunked_transfer v1.4.0
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling tectonic_bridge_core v0.3.0
[INFO] [stderr]    Compiling openssl-src v300.0.4+3.0.1
[INFO] [stderr]    Compiling tectonic_cfg_support v0.1.3
[INFO] [stderr]    Compiling tokio v1.14.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling tectonic_engine_xdvipdfmx v0.1.3
[INFO] [stderr]    Compiling tectonic_engine_bibtex v0.1.3
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling tectonic_xdv v0.1.12
[INFO] [stderr]    Compiling open v1.7.1
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling tectonic_engine_xetex v0.1.4
[INFO] [stderr]    Compiling tectonic_dep_support v0.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.70
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling tectonic_errors v0.2.0
[INFO] [stderr]    Compiling tectonic_status_base v0.2.0
[INFO] [stderr]    Compiling tectonic_bridge_graphite2 v0.2.1
[INFO] [stderr]    Compiling tectonic_bridge_icu v0.2.0
[INFO] [stderr]    Compiling tectonic_bridge_freetype2 v0.2.0
[INFO] [stderr]    Compiling tectonic_bridge_harfbuzz v0.2.3
[INFO] [stderr]    Compiling tectonic_pdf_io v0.1.2
[INFO] [stderr]    Compiling tectonic_xetex_layout v0.1.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling globset v0.4.6
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling ignore v0.4.17
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling flate2 v1.0.22
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling socket2 v0.4.2
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling inotify-sys v0.1.5
[INFO] [stderr]    Compiling nix v0.22.0
[INFO] [stderr]    Compiling filetime v0.2.15
[INFO] [stderr]    Compiling which v4.2.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling backtrace v0.3.63
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling dirs v3.0.2
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling dirs v4.0.0
[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling xdg v2.4.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling app_dirs2 v2.3.3
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling darling_core v0.12.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling webpki v0.22.0
[INFO] [stderr]    Compiling sct v0.7.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling terminfo v0.7.3
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling webpki-roots v0.22.1
[INFO] [stderr]    Compiling rustls v0.20.2
[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-1.0.81/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="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"' -C metadata=08f77e167d19f954 -C extra-filename=-08f77e167d19f954 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-fcac75a3ab2b706e.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-9200e902a93b3fd4.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-d8167d72773bee47.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" "68f551b3e9bc04b4898e64e89763d73067fa7cac59c1d80432112da83d18f404", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68f551b3e9bc04b4898e64e89763d73067fa7cac59c1d80432112da83d18f404", kill_on_drop: false }`
[INFO] [stdout] 68f551b3e9bc04b4898e64e89763d73067fa7cac59c1d80432112da83d18f404