[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] 07f355a2e7a74624871c70396faa111bc9277e96
[INFO] checking servo/servo against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fservo%2Fservo" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
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[INFO] validating manifest of git repo https://github.com/servo/servo on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] removed /workspace/builds/worker-6/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-6/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" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/servo/mio.git`
[INFO] [stderr]     Updating git repository `https://github.com/rust-windowing/winit.git`
[INFO] [stderr]     Updating git repository `https://github.com/jdm/raqote`
[INFO] [stderr]     Updating git repository `https://github.com/jdm/webrender`
[INFO] [stderr]     Updating git repository `https://github.com/servo/media`
[INFO] [stderr]     Updating git repository `https://github.com/servo/webxr`
[INFO] [stderr]     Updating git repository `https://github.com/servo/devices`
[INFO] [stderr]     Updating git repository `https://github.com/servo/fontsan`
[INFO] [stderr]     Updating git submodule `https://github.com/khaledhosny/ots`
[INFO] [stderr]     Updating git submodule `https://github.com/google/brotli.git`
[INFO] [stderr]     Updating git submodule `https://github.com/hillbig/esaxx`
[INFO] [stderr]     Updating git submodule `https://github.com/google/googletest.git`
[INFO] [stderr]     Updating git submodule `https://github.com/lz4/lz4.git`
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[INFO] [stderr]     Updating git repository `https://github.com/pcwalton/signpost.git`
[INFO] [stderr]     Updating git repository `https://github.com/gfx-rs/wgpu`
[INFO] [stderr]     Updating git repository `https://github.com/servo/rust-mozjs`
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[INFO] [stderr]     Updating git repository `https://github.com/servo/mozjs`
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[INFO] [stderr]     Updating git submodule `https://github.com/KhronosGroup/OpenXR-SDK.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fs_extra v1.1.0
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[INFO] [stderr]   Downloaded tracing-core v0.1.10
[INFO] [stderr]   Downloaded rand v0.7.2
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "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] a123640ca7dbd57d83fd5b8d974254eba6a4bd19b8859ac41ec2675c1aa478fa
[INFO] running `Command { std: "docker" "start" "-a" "a123640ca7dbd57d83fd5b8d974254eba6a4bd19b8859ac41ec2675c1aa478fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a123640ca7dbd57d83fd5b8d974254eba6a4bd19b8859ac41ec2675c1aa478fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a123640ca7dbd57d83fd5b8d974254eba6a4bd19b8859ac41ec2675c1aa478fa", kill_on_drop: false }`
[INFO] [stdout] a123640ca7dbd57d83fd5b8d974254eba6a4bd19b8859ac41ec2675c1aa478fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d7f6c009b8e288b2ba5cd7dc47a84ae4e1a80b9a1b2092c34b98c86d2bd4d35
[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" "6d7f6c009b8e288b2ba5cd7dc47a84ae4e1a80b9a1b2092c34b98c86d2bd4d35", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking opaque-debug v0.2.1
[INFO] [stderr]     Checking smallbitvec v2.5.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking getopts v0.2.17
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]    Compiling libloading v0.6.1
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling cfg_aliases v0.1.0
[INFO] [stderr]     Checking atomic_refcell v0.1.7
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]     Checking signpost v0.1.0 (https://github.com/pcwalton/signpost.git#7ed71250)
[INFO] [stderr]     Checking servo-media-traits v0.1.0 (https://github.com/servo/media#b23e7228)
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking speexdsp-resampler v0.1.0
[INFO] [stderr]     Checking byte-slice-cast v0.2.0
[INFO] [stderr]     Checking copyless v0.1.4
[INFO] [stderr]     Checking urlencoding v1.3.3
[INFO] [stderr]     Checking once_cell v1.6.0
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling humantime v2.0.1
[INFO] [stderr]     Checking ucd v0.1.1
[INFO] [stderr]     Checking unicode-script v0.5.2
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]     Checking xi-unicode v0.1.0
[INFO] [stderr]    Compiling winit v0.24.0 (https://github.com/rust-windowing/winit.git?rev=4192d04a53202c199f94d1b7d883a34c9ad09272#4192d04a)
[INFO] [stderr]     Checking futures-task v0.3.13
[INFO] [stderr]    Compiling encoding_c_mem v0.2.6
[INFO] [stderr]    Compiling encoding_c v0.9.7
[INFO] [stderr]     Checking bytes v0.5.5
[INFO] [stderr]     Checking surfman-chains-api v0.2.0
[INFO] [stderr]     Checking mitochondria v1.1.2
[INFO] [stderr]    Compiling procedural-masquerade v0.1.7
[INFO] [stderr]    Compiling script_plugins v0.0.1 (/opt/rustwide/workdir/components/script_plugins)
[INFO] [stderr]     Checking binary-space-partition v0.1.2
[INFO] [stderr]     Checking tracy-rs v0.1.2
[INFO] [stderr]     Checking sw-composite v0.7.14
[INFO] [stdout] error[E0463]: can't find crate for `rustc_ast`
[INFO] [stdout]   --> components/script_plugins/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | 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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6d7f6c009b8e288b2ba5cd7dc47a84ae4e1a80b9a1b2092c34b98c86d2bd4d35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d7f6c009b8e288b2ba5cd7dc47a84ae4e1a80b9a1b2092c34b98c86d2bd4d35", kill_on_drop: false }`
[INFO] [stdout] 6d7f6c009b8e288b2ba5cd7dc47a84ae4e1a80b9a1b2092c34b98c86d2bd4d35