[INFO] cloning repository https://github.com/mthom/rusty-wam
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mthom/rusty-wam" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmthom%2Frusty-wam", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmthom%2Frusty-wam'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9ded1447ece6547f775b61d860579bef68af1260
[INFO] building mthom/rusty-wam against master#a7f375789bab1a4e4a291c963081a8ca7d2b6bd7 for pr-93180
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmthom%2Frusty-wam" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mthom/rusty-wam on toolchain a7f375789bab1a4e4a291c963081a8ca7d2b6bd7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mthom/rusty-wam
[INFO] finished tweaking git repo https://github.com/mthom/rusty-wam
[INFO] tweaked toml for git repo https://github.com/mthom/rusty-wam written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/mthom/rusty-wam already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dec17ff75301e939f390875ade9dce98bfaa9203f91b601e6959638d76c6c3d5
[INFO] running `Command { std: "docker" "start" "-a" "dec17ff75301e939f390875ade9dce98bfaa9203f91b601e6959638d76c6c3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dec17ff75301e939f390875ade9dce98bfaa9203f91b601e6959638d76c6c3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dec17ff75301e939f390875ade9dce98bfaa9203f91b601e6959638d76c6c3d5", kill_on_drop: false }`
[INFO] [stdout] dec17ff75301e939f390875ade9dce98bfaa9203f91b601e6959638d76c6c3d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d89c38198a9b5c1feab66e1422319426dc8451e4b0a4e506d75f026bd1db4958
[INFO] running `Command { std: "docker" "start" "-a" "d89c38198a9b5c1feab66e1422319426dc8451e4b0a4e506d75f026bd1db4958", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.85
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.2
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling rug v1.11.0
[INFO] [stderr]    Compiling byteorder v1.4.2
[INFO] [stderr]    Compiling az v1.1.0
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling match_cfg v0.1.0
[INFO] [stderr]    Compiling xmlparser v0.13.3
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling ref_thread_local v0.0.0
[INFO] [stderr]    Compiling divrem v0.1.0
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling unicode_reader v1.0.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling tendril v0.4.2
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling blake2 v0.8.1
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling sha3 v0.8.2
[INFO] [stderr]    Compiling ripemd160 v0.8.0
[INFO] [stderr]    Compiling roxmltree v0.11.0
[INFO] [stderr]    Compiling openssl-src v111.13.0+1.1.1i
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling scryer-prolog v0.8.128 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling libsodium-sys v0.2.6
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling ordered-float v0.5.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling lexical v5.2.2
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling slice-deque v0.3.0
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling cpu-time v1.0.0
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling git-version-macro v0.3.4
[INFO] [stderr]    Compiling signal-hook v0.1.17
[INFO] [stderr]    Compiling crossterm v0.16.0
[INFO] [stderr]    Compiling git-version v0.3.4
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.44/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="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=77ef50f7c17540e8 -C extra-filename=-77ef50f7c17540e8 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-74cf65b213176c4b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-520fec877571f6ee.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-17df5e5ca0bb5bda.rmeta --cap-lints allow --cap-lints=forbid --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path` (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" "d89c38198a9b5c1feab66e1422319426dc8451e4b0a4e506d75f026bd1db4958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d89c38198a9b5c1feab66e1422319426dc8451e4b0a4e506d75f026bd1db4958", kill_on_drop: false }`
[INFO] [stdout] d89c38198a9b5c1feab66e1422319426dc8451e4b0a4e506d75f026bd1db4958