[INFO] cloning repository https://github.com/Vollbrecht/callback-bug
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Vollbrecht/callback-bug" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVollbrecht%2Fcallback-bug", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVollbrecht%2Fcallback-bug'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4f005211753f10e5481e94978d0f32500f17d70
[INFO] testing Vollbrecht/callback-bug against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVollbrecht%2Fcallback-bug" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Vollbrecht/callback-bug on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Vollbrecht/callback-bug
[INFO] finished tweaking git repo https://github.com/Vollbrecht/callback-bug
[INFO] tweaked toml for git repo https://github.com/Vollbrecht/callback-bug written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Vollbrecht/callback-bug already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62c340abf8f9cca896ae09f06c38fc4bcb01a171a6fdb1a881a53f06cd6d3418
[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" "62c340abf8f9cca896ae09f06c38fc4bcb01a171a6fdb1a881a53f06cd6d3418", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62c340abf8f9cca896ae09f06c38fc4bcb01a171a6fdb1a881a53f06cd6d3418", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62c340abf8f9cca896ae09f06c38fc4bcb01a171a6fdb1a881a53f06cd6d3418", kill_on_drop: false }`
[INFO] [stdout] 62c340abf8f9cca896ae09f06c38fc4bcb01a171a6fdb1a881a53f06cd6d3418
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "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] 95b25da8cf5eb1960268e9db4a27b52a77f22ed74e11181639707d298b1b80f7
[INFO] running `Command { std: "docker" "start" "-a" "95b25da8cf5eb1960268e9db4a27b52a77f22ed74e11181639707d298b1b80f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling bytemuck v1.7.3
[INFO] [stderr]    Compiling unicode-general-category v0.4.0
[INFO] [stderr]    Compiling ttf-parser v0.12.3
[INFO] [stderr]    Compiling weezl v0.1.5
[INFO] [stderr]    Compiling unicode-ccc v0.1.2
[INFO] [stderr]    Compiling unicode-bidi-mirroring v0.1.0
[INFO] [stderr]    Compiling unicode-script v0.5.4
[INFO] [stderr]    Compiling xmlparser v0.13.3
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling rctree v0.4.0
[INFO] [stderr]    Compiling unicode-vo v0.1.0
[INFO] [stderr]    Compiling xmlwriter v0.1.0
[INFO] [stderr]    Compiling pico-args v0.4.2
[INFO] [stderr]    Compiling if_rust_version v1.0.0
[INFO] [stderr]    Compiling by_address v1.0.4
[INFO] [stderr]    Compiling codemap v0.1.3
[INFO] [stderr]    Compiling countme v2.0.4
[INFO] [stderr]    Compiling text-size v1.1.0
[INFO] [stderr]    Compiling sixtyfps-compilerlib v0.1.5
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling winit v0.25.0
[INFO] [stderr]    Compiling dunce v1.0.2
[INFO] [stderr]    Compiling scoped-tls-hkt v0.1.2
[INFO] [stderr]    Compiling pin-weak v1.1.0
[INFO] [stderr]    Compiling weak-table v0.3.2
[INFO] [stderr]    Compiling glow v0.11.1
[INFO] [stderr]    Compiling lru v0.6.6
[INFO] [stderr]    Compiling imgref v1.9.1
[INFO] [stderr]    Compiling sixtyfps-macros v0.1.5
[INFO] [stderr]    Compiling sixtyfps-rendering-backend-default v0.1.5
[INFO] [stderr]    Compiling float-ord v0.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling auto_enums_derive v0.7.12
[INFO] [stderr]    Compiling cmake v0.1.46
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling servo-fontconfig-sys v5.1.0
[INFO] [stderr]    Compiling css-color-parser2 v1.0.1
[INFO] [stderr]    Compiling deflate v0.9.1
[INFO] [stderr]    Compiling data-url v0.1.1
[INFO] [stderr]    Compiling kurbo v0.8.3
[INFO] [stderr]    Compiling rgb v0.8.31
[INFO] [stderr]    Compiling safe_arch v0.5.2
[INFO] [stderr]    Compiling spin_on v0.1.1
[INFO] [stderr]    Compiling svgtypes v0.8.0
[INFO] [stderr]    Compiling gif v0.11.3
[INFO] [stderr]    Compiling generational-arena v0.2.8
[INFO] [stderr]    Compiling roxmltree v0.14.1
[INFO] [stderr]    Compiling memmap2 v0.5.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling raw-window-handle v0.3.4
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling simplecss v0.2.1
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stderr]    Compiling x11-dl v2.19.1
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling smol_str v0.1.21
[INFO] [stderr]    Compiling svgfilters v0.4.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rowan v0.14.1
[INFO] [stderr]    Compiling triomphe v0.1.5
[INFO] [stderr]    Compiling sid v0.6.1
[INFO] [stderr]    Compiling freetype-sys v0.13.1
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling codemap-diagnostic v0.1.1
[INFO] [stderr]    Compiling fontdb v0.7.0
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling cpp_common v0.5.6
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling const-field-offset-macro v0.1.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling derive_utils v0.11.2
[INFO] [stderr]    Compiling auto_enums_core v0.7.12
[INFO] [stderr]    Compiling vtable-macro v0.1.4
[INFO] [stderr]    Compiling strum_macros v0.23.1
[INFO] [stderr]    Compiling sixtyfps-corelib-macros v0.1.5
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling xcb v0.10.1
[INFO] [stderr]    Compiling pathfinder_simd v0.5.1
[INFO] [stderr]    Compiling png v0.17.2
[INFO] [stderr]    Compiling flate2 v1.0.22
[INFO] [stderr]    Compiling cpp_build v0.5.6
[INFO] [stderr]    Compiling rustybuzz v0.4.0
[INFO] [stderr]    Compiling ouroboros_macro v0.12.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling crossbeam v0.8.1
[INFO] [stderr]    Compiling cpp_macros v0.5.6
[INFO] [stderr]    Compiling lyon_svg v0.17.2
[INFO] [stderr]    Compiling lyon_algorithms v0.17.7
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.7
[INFO] [stderr]    Compiling mio-misc v1.2.2
[INFO] [stderr]    Compiling tiny-skia v0.6.1
[INFO] [stderr]    Compiling field-offset v0.3.4
[INFO] [stderr]    Compiling qttypes v0.2.6
[INFO] [stderr]    Compiling sixtyfps-rendering-backend-qt v0.1.5
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling freetype v0.7.0
[INFO] [stderr]    Compiling const-field-offset v0.1.2
[INFO] [stderr]    Compiling num_enum_derive v0.5.5
[INFO] [stderr]    Compiling servo-fontconfig v0.5.1
[INFO] [stderr]    Compiling pathfinder_geometry v0.5.1
[INFO] [stderr] error: could not compile `rustybuzz`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name rustybuzz --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustybuzz-0.4.0/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 -C metadata=0bf791891b8366f3 -C extra-filename=-0bf791891b8366f3 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-1693f043aa7c36ab.rmeta --extern bytemuck=/opt/rustwide/target/debug/deps/libbytemuck-55e567ee7e5083b6.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-61cf542293a74a33.rmeta --extern ttf_parser=/opt/rustwide/target/debug/deps/libttf_parser-4e915caaeebe8d58.rmeta --extern unicode_bidi_mirroring=/opt/rustwide/target/debug/deps/libunicode_bidi_mirroring-58c7fb3564e9e42b.rmeta --extern unicode_ccc=/opt/rustwide/target/debug/deps/libunicode_ccc-bcbddfc41bac9a82.rmeta --extern unicode_general_category=/opt/rustwide/target/debug/deps/libunicode_general_category-4a1c9720dcb3e043.rmeta --extern unicode_script=/opt/rustwide/target/debug/deps/libunicode_script-16fa3d45e44d49cc.rmeta --cap-lints allow --cap-lints=warn` (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" "95b25da8cf5eb1960268e9db4a27b52a77f22ed74e11181639707d298b1b80f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95b25da8cf5eb1960268e9db4a27b52a77f22ed74e11181639707d298b1b80f7", kill_on_drop: false }`
[INFO] [stdout] 95b25da8cf5eb1960268e9db4a27b52a77f22ed74e11181639707d298b1b80f7