[INFO] cloning repository https://github.com/bedwards/plugin-rack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bedwards/plugin-rack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbedwards%2Fplugin-rack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbedwards%2Fplugin-rack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88df904db8384ccbfe8e5d30748608ce47ee646e
[INFO] testing bedwards/plugin-rack against try#b8e88e5ddf5521a9f43ee3f62a702388c713e4bb for pr-155114
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbedwards%2Fplugin-rack" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-3-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/bedwards/plugin-rack
[INFO] finished tweaking git repo https://github.com/bedwards/plugin-rack
[INFO] tweaked toml for git repo https://github.com/bedwards/plugin-rack written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bedwards/plugin-rack on toolchain b8e88e5ddf5521a9f43ee3f62a702388c713e4bb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bedwards/plugin-rack already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab4400e916bab1f85b98835a97789d07d7535f5c7a04e699a2ca9be3773d709c
[INFO] running `Command { std: "docker" "start" "-a" "ab4400e916bab1f85b98835a97789d07d7535f5c7a04e699a2ca9be3773d709c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab4400e916bab1f85b98835a97789d07d7535f5c7a04e699a2ca9be3773d709c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab4400e916bab1f85b98835a97789d07d7535f5c7a04e699a2ca9be3773d709c", kill_on_drop: false }`
[INFO] [stdout] ab4400e916bab1f85b98835a97789d07d7535f5c7a04e699a2ca9be3773d709c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68727477bfc922142ac5fb78ea8be7ee33cd5fc3c6bdcc2e13627f366b0a7dc5
[INFO] running `Command { std: "docker" "start" "-a" "68727477bfc922142ac5fb78ea8be7ee33cd5fc3c6bdcc2e13627f366b0a7dc5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.185
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling kurbo v0.13.0
[INFO] [stderr]    Compiling linebender_resource_handle v0.1.1
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling atomic_float v1.1.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling x11rb-protocol v0.13.2
[INFO] [stderr]    Compiling gimli v0.32.3
[INFO] [stderr]    Compiling pkg-config v0.3.33
[INFO] [stderr]    Compiling time-core v0.1.7
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling xcursor v0.3.10
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling crossbeam v0.8.4
[INFO] [stderr]    Compiling time-macros v0.2.25
[INFO] [stderr]    Compiling deranged v0.5.8
[INFO] [stderr]    Compiling uuid v1.23.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.27
[INFO] [stderr]    Compiling x11 v2.21.0
[INFO] [stderr]    Compiling self_cell v1.2.2
[INFO] [stderr]    Compiling accesskit v0.24.0
[INFO] [stderr]    Compiling libloading v0.8.9
[INFO] [stderr]    Compiling is-docker v0.2.0
[INFO] [stderr]    Compiling unicode-segmentation v1.13.2
[INFO] [stderr]    Compiling raw-window-handle v0.5.2
[INFO] [stderr]    Compiling is-wsl v0.4.0
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling keyboard-types v0.6.2
[INFO] [stderr]    Compiling widestring v1.2.1
[INFO] [stderr]    Compiling clap-sys v0.5.0 (https://github.com/micahrj/clap-sys.git?rev=25d7f53fdb6363ad63fbd80049cb7a42a97ac156#25d7f53f)
[INFO] [stderr]    Compiling midi-consts v0.1.0
[INFO] [stderr]    Compiling pathdiff v0.2.3
[INFO] [stderr]    Compiling camino v1.2.2
[INFO] [stderr]    Compiling anymap3 v1.0.1
[INFO] [stderr]    Compiling clap-sys v0.5.0
[INFO] [stderr]    Compiling atomic_refcell v0.1.13
[INFO] [stderr]    Compiling glow v0.17.0
[INFO] [stderr]    Compiling winnow v1.0.1
[INFO] [stderr]    Compiling com-scrape-types v0.1.1
[INFO] [stderr]    Compiling semver v1.0.28
[INFO] [stderr]    Compiling clack-common v0.1.0 (https://github.com/prokopyl/clack.git?rev=4541f03792635dfdc6be9441a01b786e9b4ccf18#4541f037)
[INFO] [stderr]    Compiling vst3 v0.3.0
[INFO] [stderr]    Compiling serde_spanned v1.1.1
[INFO] [stderr]    Compiling toml_parser v1.1.2+spec-1.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling time v0.3.45
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling nix v0.22.3
[INFO] [stderr]    Compiling open v5.3.3
[INFO] [stderr]    Compiling clack-host v0.1.0 (https://github.com/prokopyl/clack.git?rev=4541f03792635dfdc6be9441a01b786e9b4ccf18#4541f037)
[INFO] [stderr]    Compiling addr2line v0.25.1
[INFO] [stderr]    Compiling vst3-com-macros-support v0.2.0 (https://github.com/robbert-vdh/vst3-sys.git?branch=fix%2Fdrop-box-from-raw#b3ff4d77)
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/b8e88e5ddf5521a9f43ee3f62a702388c713e4bb/bin/rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-1.0.109/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 --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"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "test", "visit", "visit-mut"))' -C metadata=870d7f86b08a35a7 -C extra-filename=-6d9169d8571bbfb0 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-774d2fb1b129607b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-e79a3b083d919da9.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-af4dab7b77cddc19.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "68727477bfc922142ac5fb78ea8be7ee33cd5fc3c6bdcc2e13627f366b0a7dc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68727477bfc922142ac5fb78ea8be7ee33cd5fc3c6bdcc2e13627f366b0a7dc5", kill_on_drop: false }`
[INFO] [stdout] 68727477bfc922142ac5fb78ea8be7ee33cd5fc3c6bdcc2e13627f366b0a7dc5