[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] 8db58c8afe9a55306f0994e145e41143fecbf8c5
[INFO] testing servo/servo against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[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 a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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] 45ead34a64eaac7b16b1c858e4723c52f75c06e14a07370ab269e8aed72c8dad
[INFO] running `Command { std: "docker" "start" "-a" "45ead34a64eaac7b16b1c858e4723c52f75c06e14a07370ab269e8aed72c8dad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45ead34a64eaac7b16b1c858e4723c52f75c06e14a07370ab269e8aed72c8dad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45ead34a64eaac7b16b1c858e4723c52f75c06e14a07370ab269e8aed72c8dad", kill_on_drop: false }`
[INFO] [stdout] 45ead34a64eaac7b16b1c858e4723c52f75c06e14a07370ab269e8aed72c8dad
[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=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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3549ce264dcc9a0d4aa57e2c5a2d86b8a3f6df5ca29522becdac65d62e0a975a
[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" "3549ce264dcc9a0d4aa57e2c5a2d86b8a3f6df5ca29522becdac65d62e0a975a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling httparse v1.3.6
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling opaque-debug v0.2.1
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling base64 v0.12.0
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling smallbitvec v2.5.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling libloading v0.6.1
[INFO] [stderr]    Compiling getopts v0.2.17
[INFO] [stderr]    Compiling cfg_aliases v0.1.0
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling once_cell v1.6.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling arrayvec v0.7.1
[INFO] [stderr]    Compiling weezl v0.1.4
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling bytemuck v1.5.1
[INFO] [stderr]    Compiling atomic_refcell v0.1.7
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling boxfnonce v0.1.1
[INFO] [stderr]    Compiling ordermap v0.3.5
[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 bindgen v0.58.1
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling byte-slice-cast v0.2.0
[INFO] [stderr]    Compiling inplace_it v0.3.2
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling speexdsp-resampler v0.1.0
[INFO] [stderr]    Compiling urlencoding v1.3.3
[INFO] [stderr]    Compiling downcast-rs v1.1.1
[INFO] [stderr]    Compiling futures-sink v0.3.13
[INFO] [stderr]    Compiling futures-core v0.3.13
[INFO] [stderr]    Compiling futures-io v0.3.13
[INFO] [stderr]    Compiling futures-task v0.3.13
[INFO] [stderr]    Compiling ucd v0.1.1
[INFO] [stderr]    Compiling winit v0.24.0 (https://github.com/rust-windowing/winit.git?rev=4192d04a53202c199f94d1b7d883a34c9ad09272#4192d04a)
[INFO] [stderr]    Compiling unicode-script v0.5.2
[INFO] [stderr]    Compiling encoding_c_mem v0.2.6
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]    Compiling encoding_c v0.9.7
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling xi-unicode v0.1.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling procedural-masquerade v0.1.7
[INFO] [stderr]    Compiling surfman-chains-api v0.2.0
[INFO] [stderr]    Compiling binary-space-partition v0.1.2
[INFO] [stderr]    Compiling float-ord v0.2.0
[INFO] [stderr]    Compiling tracy-rs v0.1.2
[INFO] [stderr]    Compiling sw-composite v0.7.14
[INFO] [stderr]    Compiling typed-arena v2.0.1
[INFO] [stderr]    Compiling script_plugins v0.0.1 (/opt/rustwide/workdir/components/script_plugins)
[INFO] [stderr]    Compiling svg_fmt v0.4.0
[INFO] [stderr]    Compiling mitochondria v1.1.2
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.1
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[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]    = help: maybe you need to install the missing components with: `rustup component add rust-src rustc-dev llvm-tools-preview`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling half v1.6.0
[INFO] [stderr]    Compiling hyper-openssl v0.7.1
[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" "3549ce264dcc9a0d4aa57e2c5a2d86b8a3f6df5ca29522becdac65d62e0a975a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3549ce264dcc9a0d4aa57e2c5a2d86b8a3f6df5ca29522becdac65d62e0a975a", kill_on_drop: false }`
[INFO] [stdout] 3549ce264dcc9a0d4aa57e2c5a2d86b8a3f6df5ca29522becdac65d62e0a975a