[INFO] cloning repository https://github.com/web-dom/webcomponent
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/web-dom/webcomponent" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweb-dom%2Fwebcomponent", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweb-dom%2Fwebcomponent'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b8acde96bdf6d34812e3051313fa0980f674bbb
[INFO] checking web-dom/webcomponent against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweb-dom%2Fwebcomponent" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/web-dom/webcomponent on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/web-dom/webcomponent
[INFO] finished tweaking git repo https://github.com/web-dom/webcomponent
[INFO] tweaked toml for git repo https://github.com/web-dom/webcomponent written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/web-dom/webcomponent already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anymap v0.12.1
[INFO] [stderr]   Downloaded web-dom v0.0.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 480393f2969a5da3b35f5432b46433c2415c4deaeca563f07b9fa623a3ebef5e
[INFO] running `Command { std: "docker" "start" "-a" "480393f2969a5da3b35f5432b46433c2415c4deaeca563f07b9fa623a3ebef5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "480393f2969a5da3b35f5432b46433c2415c4deaeca563f07b9fa623a3ebef5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "480393f2969a5da3b35f5432b46433c2415c4deaeca563f07b9fa623a3ebef5e", kill_on_drop: false }`
[INFO] [stdout] 480393f2969a5da3b35f5432b46433c2415c4deaeca563f07b9fa623a3ebef5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cdb4c107df5b213896e13a0636fb1294562ed84859cd361bd4b6a4079b316bf1
[INFO] running `Command { std: "docker" "start" "-a" "cdb4c107df5b213896e13a0636fb1294562ed84859cd361bd4b6a4079b316bf1", kill_on_drop: false }`
[INFO] [stderr]     Checking web-dom v0.0.8
[INFO] [stderr]     Checking webcomponent v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `*controller` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/lib.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             (controller.processor)(controller, &tag, el);
[INFO] [stdout]    |             ----------------------^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |             immutable borrow occurs here
[INFO] [stdout]    |             immutable borrow later used by call
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `*controller` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/lib.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             (controller.processor)(controller, &tag, el);
[INFO] [stdout]    |             ----------------------^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |             immutable borrow occurs here
[INFO] [stdout]    |             immutable borrow later used by call
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `webcomponent` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[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 E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "cdb4c107df5b213896e13a0636fb1294562ed84859cd361bd4b6a4079b316bf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdb4c107df5b213896e13a0636fb1294562ed84859cd361bd4b6a4079b316bf1", kill_on_drop: false }`
[INFO] [stdout] cdb4c107df5b213896e13a0636fb1294562ed84859cd361bd4b6a4079b316bf1