[INFO] cloning repository https://github.com/servo/servo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/servo/servo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fservo%2Fservo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fservo%2Fservo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74f1eb199e67e82ff713f77f7803f02a25966628
[INFO] testing servo/servo against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fservo%2Fservo" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/servo/servo on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-8/source/.cargo/config
[INFO] removed /workspace/builds/worker-8/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/servo/servo
[INFO] finished tweaking git repo https://github.com/servo/servo
[INFO] tweaked toml for git repo https://github.com/servo/servo written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/servo/servo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", 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] 3259beb09b2e5c95314f85945fa7b3129350caa96d9acecbed896a20ad2b1c92
[INFO] running `Command { std: "docker" "start" "-a" "3259beb09b2e5c95314f85945fa7b3129350caa96d9acecbed896a20ad2b1c92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3259beb09b2e5c95314f85945fa7b3129350caa96d9acecbed896a20ad2b1c92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3259beb09b2e5c95314f85945fa7b3129350caa96d9acecbed896a20ad2b1c92", kill_on_drop: false }`
[INFO] [stdout] 3259beb09b2e5c95314f85945fa7b3129350caa96d9acecbed896a20ad2b1c92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d2d5f7bc7830400fc71db522a49b934bb742b7b50d12f88296704b977ef67d8
[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" "4d2d5f7bc7830400fc71db522a49b934bb742b7b50d12f88296704b977ef67d8", kill_on_drop: false }`
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The lib target `layout` in package `layout_2020 v0.0.1 (/opt/rustwide/workdir/components/layout_2020)` has the same output filename as the lib target `layout` in package `layout_2013 v0.0.1 (/opt/rustwide/workdir/components/layout)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/liblayout.rlib
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The lib target `layout_thread` in package `layout_thread_2020 v0.0.1 (/opt/rustwide/workdir/components/layout_thread_2020)` has the same output filename as the lib target `layout_thread` in package `layout_thread_2013 v0.0.1 (/opt/rustwide/workdir/components/layout_thread)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/liblayout_thread.rlib
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The lib target `simpleservo` in package `simpleservo_jniapi v0.0.1 (/opt/rustwide/workdir/ports/libsimpleservo/jniapi)` has the same output filename as the lib target `simpleservo` in package `simpleservo_capi v0.0.1 (/opt/rustwide/workdir/ports/libsimpleservo/capi)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/deps/libsimpleservo.so
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The lib target `simpleservo` in package `simpleservo_jniapi v0.0.1 (/opt/rustwide/workdir/ports/libsimpleservo/jniapi)` has the same output filename as the lib target `simpleservo` in package `simpleservo_capi v0.0.1 (/opt/rustwide/workdir/ports/libsimpleservo/capi)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/libsimpleservo.so
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling base64 v0.12.0
[INFO] [stderr]    Compiling smallbitvec v2.5.0
[INFO] [stderr]    Compiling libloading v0.6.1
[INFO] [stderr]    Compiling cfg_aliases v0.1.0
[INFO] [stderr]    Compiling once_cell v1.6.0
[INFO] [stderr]    Compiling weezl v0.1.4
[INFO] [stderr]    Compiling arrayvec v0.7.1
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling servo-media-traits v0.1.0 (https://github.com/servo/media#b23e7228)
[INFO] [stderr]    Compiling signpost v0.1.0 (https://github.com/pcwalton/signpost.git#7ed71250)
[INFO] [stderr]    Compiling boxfnonce v0.1.1
[INFO] [stderr]    Compiling speexdsp-resampler v0.1.0
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling byte-slice-cast v0.2.0
[INFO] [stderr]    Compiling urlencoding v1.3.3
[INFO] [stderr]    Compiling futures-task v0.3.13
[INFO] [stderr]    Compiling ucd v0.1.1
[INFO] [stderr]    Compiling encoding_c v0.9.7
[INFO] [stderr]    Compiling unicode-script v0.5.2
[INFO] [stderr]    Compiling winit v0.24.0 (https://github.com/rust-windowing/winit.git?rev=4192d04a53202c199f94d1b7d883a34c9ad09272#4192d04a)
[INFO] [stderr]    Compiling encoding_c_mem v0.2.6
[INFO] [stderr]    Compiling surfman-chains-api v0.2.0
[INFO] [stderr]    Compiling binary-space-partition v0.1.2
[INFO] [stderr]    Compiling sw-composite v0.7.14
[INFO] [stderr]    Compiling svg_fmt v0.4.0
[INFO] [stderr]    Compiling script_plugins v0.0.1 (/opt/rustwide/workdir/components/script_plugins)
[INFO] [stderr]    Compiling tracy-rs v0.1.2
[INFO] [stderr]    Compiling mitochondria v1.1.2
[INFO] [stderr]    Compiling swapper v0.1.0
[INFO] [stderr]    Compiling hyper-openssl v0.7.1
[INFO] [stderr]    Compiling ref_filter_map v1.0.1
[INFO] [stdout] error[E0463]: can't find crate for `rustc_ast`
[INFO] [stdout]   --> components/script_plugins/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | extern crate rustc_ast;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `script_plugins` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4d2d5f7bc7830400fc71db522a49b934bb742b7b50d12f88296704b977ef67d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d2d5f7bc7830400fc71db522a49b934bb742b7b50d12f88296704b977ef67d8", kill_on_drop: false }`
[INFO] [stdout] 4d2d5f7bc7830400fc71db522a49b934bb742b7b50d12f88296704b977ef67d8