[INFO] cloning repository https://github.com/sambhavsaggi/browserception
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sambhavsaggi/browserception" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsambhavsaggi%2Fbrowserception", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsambhavsaggi%2Fbrowserception'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 97d9d75483ab24f1c80fde5f7654f5c3141c8485
[INFO] checking sambhavsaggi/browserception against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsambhavsaggi%2Fbrowserception" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sambhavsaggi/browserception on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sambhavsaggi/browserception
[INFO] finished tweaking git repo https://github.com/sambhavsaggi/browserception
[INFO] tweaked toml for git repo https://github.com/sambhavsaggi/browserception written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/sambhavsaggi/browserception already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1046e749669b01c97f45b9594e72152d53c514b482fa9e89201ce64a351fd56f
[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" "1046e749669b01c97f45b9594e72152d53c514b482fa9e89201ce64a351fd56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1046e749669b01c97f45b9594e72152d53c514b482fa9e89201ce64a351fd56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1046e749669b01c97f45b9594e72152d53c514b482fa9e89201ce64a351fd56f", kill_on_drop: false }`
[INFO] [stdout] 1046e749669b01c97f45b9594e72152d53c514b482fa9e89201ce64a351fd56f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--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] 46cbccd61bc62010a6f306befa16dd4ccb88c8e563a6c893254d643e5a997248
[INFO] running `Command { std: "docker" "start" "-a" "46cbccd61bc62010a6f306befa16dd4ccb88c8e563a6c893254d643e5a997248", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling encoding_rs v0.8.29
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]    Compiling xml-rs v0.8.4
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]     Checking thin-slice v0.1.1
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking unicode-segmentation v1.8.0
[INFO] [stderr]     Checking smallbitvec v2.5.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]     Checking arrayvec v0.7.1
[INFO] [stderr]     Checking minimal-lexical v0.1.4
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking boxfnonce v0.1.1
[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 atomic_refcell v0.1.8
[INFO] [stderr]     Checking byte-slice-cast v0.2.0
[INFO] [stderr]     Checking speexdsp-resampler v0.1.0
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]     Checking signpost v0.1.0 (https://github.com/pcwalton/signpost.git#7ed71250)
[INFO] [stderr]    Compiling winit v0.24.0 (https://github.com/rust-windowing/winit.git?rev=4192d04a53202c199f94d1b7d883a34c9ad09272#4192d04a)
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]     Checking urlencoding v1.3.3
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling encoding_c_mem v0.2.6
[INFO] [stderr]    Compiling encoding_c v0.9.8
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]    Compiling procedural-masquerade v0.1.7
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking surfman-chains-api v0.2.0
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking cpufeatures v0.2.1
[INFO] [stderr]     Checking unicode-script v0.5.4
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking binary-space-partition v0.1.2
[INFO] [stderr]     Checking ucd v0.1.1
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.3
[INFO] [stderr]     Checking sw-composite v0.7.14
[INFO] [stderr]     Checking tracy-rs v0.1.2
[INFO] [stderr]    Compiling hyper-openssl v0.7.1
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]    Compiling net v0.0.1 (https://github.com/servo/servo?rev=6734eab188b5264b8d0b11686f332d88205e8d1f#6734eab1)
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking swapper v0.1.0
[INFO] [stderr]    Compiling script_plugins v0.0.1 (https://github.com/servo/servo?rev=6734eab188b5264b8d0b11686f332d88205e8d1f#6734eab1)
[INFO] [stderr]     Checking ref_filter_map v1.0.1
[INFO] [stderr]    Compiling libservo v0.0.1 (https://github.com/servo/servo?rev=6734eab188b5264b8d0b11686f332d88205e8d1f#6734eab1)
[INFO] [stderr]     Checking mitochondria v1.1.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stdout] error[E0463]: can't find crate for `rustc_ast`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/servo-12bfca331f128de3/6734eab/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] [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]     Checking instant v0.1.12
[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" "46cbccd61bc62010a6f306befa16dd4ccb88c8e563a6c893254d643e5a997248", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46cbccd61bc62010a6f306befa16dd4ccb88c8e563a6c893254d643e5a997248", kill_on_drop: false }`
[INFO] [stdout] 46cbccd61bc62010a6f306befa16dd4ccb88c8e563a6c893254d643e5a997248