[INFO] fetching crate webkit2gtk 0.11.0...
[INFO] testing webkit2gtk-0.11.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate webkit2gtk 0.11.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate webkit2gtk 0.11.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate webkit2gtk 0.11.0
[INFO] finished tweaking crates.io crate webkit2gtk 0.11.0
[INFO] tweaked toml for crates.io crate webkit2gtk 0.11.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate webkit2gtk 0.11.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.33
[INFO] [stderr]   Downloaded javascriptcore-rs v0.10.0
[INFO] [stderr]   Downloaded webkit2gtk-sys v0.13.0
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55ed0bfe15f5be4e059858ee2cf492c63cda006f64171b806de9a2ee8de2fe4c
[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" "55ed0bfe15f5be4e059858ee2cf492c63cda006f64171b806de9a2ee8de2fe4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55ed0bfe15f5be4e059858ee2cf492c63cda006f64171b806de9a2ee8de2fe4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55ed0bfe15f5be4e059858ee2cf492c63cda006f64171b806de9a2ee8de2fe4c", kill_on_drop: false }`
[INFO] [stdout] 55ed0bfe15f5be4e059858ee2cf492c63cda006f64171b806de9a2ee8de2fe4c
[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=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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a89578326ccb2b34df4fe7d2e8f44ee52346c67fafda0e303236ff045fedf514
[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" "a89578326ccb2b34df4fe7d2e8f44ee52346c67fafda0e303236ff045fedf514", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling futures-sink v0.3.7
[INFO] [stderr]    Compiling futures-io v0.3.7
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]    Compiling gio v0.9.1
[INFO] [stderr]    Compiling cairo-rs v0.9.1
[INFO] [stderr]    Compiling gdk-pixbuf v0.9.0
[INFO] [stderr]    Compiling pango v0.9.1
[INFO] [stderr]    Compiling atk v0.9.0
[INFO] [stderr]    Compiling gdk v0.13.2
[INFO] [stderr]    Compiling futures-task v0.3.7
[INFO] [stderr]    Compiling webkit2gtk-sys v0.13.0
[INFO] [stderr]    Compiling gtk v0.9.2
[INFO] [stderr]    Compiling javascriptcore-rs-sys v0.2.0
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling futures-channel v0.3.7
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling futures-macro v0.3.7
[INFO] [stderr]    Compiling glib-macros v0.10.1
[INFO] [stderr]    Compiling thiserror v1.0.21
[INFO] [stderr]    Compiling system-deps v1.3.2
[INFO] [stderr]    Compiling pin-project v1.0.1
[INFO] [stderr]    Compiling futures-util v0.3.7
[INFO] [stderr]    Compiling glib-sys v0.10.1
[INFO] [stderr]    Compiling gobject-sys v0.10.0
[INFO] [stderr]    Compiling gio-sys v0.10.1
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.10.0
[INFO] [stderr]    Compiling pango-sys v0.10.0
[INFO] [stderr]    Compiling gdk-sys v0.10.0
[INFO] [stderr]    Compiling atk-sys v0.10.0
[INFO] [stderr]    Compiling gtk-sys v0.10.0
[INFO] [stderr]    Compiling soup-sys v0.10.0
[INFO] [stderr]    Compiling futures-executor v0.3.7
[INFO] [stderr]    Compiling glib v0.10.3
[INFO] [stderr]    Compiling futures v0.3.7
[INFO] [stderr]    Compiling javascriptcore-rs v0.10.0
[INFO] [stderr]    Compiling webkit2gtk v0.11.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/auto/download.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |         let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/auto/web_context.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gtk`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name gtk /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gtk-0.9.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=9c1d59af3b5d84e4 -C extra-filename=-9c1d59af3b5d84e4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern atk=/opt/rustwide/target/debug/deps/libatk-4db3a29c3551f6eb.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-8a5476fab5bb3232.rmeta --extern cairo=/opt/rustwide/target/debug/deps/libcairo-a5e653b883fded0e.rmeta --extern cairo_sys=/opt/rustwide/target/debug/deps/libcairo_sys-50c94ed940391a69.rmeta --extern gdk=/opt/rustwide/target/debug/deps/libgdk-27fd73ccc9d8569a.rmeta --extern gdk_pixbuf=/opt/rustwide/target/debug/deps/libgdk_pixbuf-3412d8ffb571921d.rmeta --extern gdk_pixbuf_sys=/opt/rustwide/target/debug/deps/libgdk_pixbuf_sys-e9ca1d460ec66f92.rmeta --extern gdk_sys=/opt/rustwide/target/debug/deps/libgdk_sys-43f7bc882a6bf965.rmeta --extern gio=/opt/rustwide/target/debug/deps/libgio-5ed6d228a9da0077.rmeta --extern gio_sys=/opt/rustwide/target/debug/deps/libgio_sys-378970ef4980ef24.rmeta --extern glib=/opt/rustwide/target/debug/deps/libglib-666d1c560c337769.rmeta --extern glib_sys=/opt/rustwide/target/debug/deps/libglib_sys-c6f95a0a7c87ee32.rmeta --extern gobject_sys=/opt/rustwide/target/debug/deps/libgobject_sys-a5c4491d42c918f4.rmeta --extern gtk_sys=/opt/rustwide/target/debug/deps/libgtk_sys-ebb386c63d1cf4db.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-3d9721a098b165bd.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-7d26ff1c9d0b40d3.rmeta --extern pango=/opt/rustwide/target/debug/deps/libpango-f614a0c9a20b2ef3.rmeta --extern pango_sys=/opt/rustwide/target/debug/deps/libpango_sys-1b4b4fdbbb155df6.rmeta --cap-lints allow --cap-lints=warn --cfg 'gdk_backend="x11"' --cfg 'gdk_backend="broadway"' --cfg 'gdk_backend="wayland"'` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a89578326ccb2b34df4fe7d2e8f44ee52346c67fafda0e303236ff045fedf514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a89578326ccb2b34df4fe7d2e8f44ee52346c67fafda0e303236ff045fedf514", kill_on_drop: false }`
[INFO] [stdout] a89578326ccb2b34df4fe7d2e8f44ee52346c67fafda0e303236ff045fedf514