[INFO] fetching crate rangoon 0.0.0...
[INFO] checking rangoon-0.0.0 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate rangoon 0.0.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rangoon 0.0.0 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 crates.io crate rangoon 0.0.0
[INFO] finished tweaking crates.io crate rangoon 0.0.0
[INFO] tweaked toml for crates.io crate rangoon 0.0.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hecs v0.3.2
[INFO] [stderr]   Downloaded web-dom v0.3.9
[INFO] [stderr]   Downloaded web_canvas v0.0.7
[INFO] [stderr]   Downloaded class_names v0.0.1
[INFO] [stderr]   Downloaded web_timer v0.2.5
[INFO] [stderr]   Downloaded web v0.1.15
[INFO] [stderr]   Downloaded web_console v0.3.7
[INFO] [stderr]   Downloaded web_local_storage v0.0.2
[INFO] [stderr]   Downloaded html_color v0.0.0
[INFO] [stderr]   Downloaded web_random v0.1.5
[INFO] [stderr]   Downloaded webcomponent v0.6.2
[INFO] [stderr]   Downloaded web_common v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 53f0a430bbe51a8830c7fd110800a27e712d54373a73c524b81e3299ce47cc1b
[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" "53f0a430bbe51a8830c7fd110800a27e712d54373a73c524b81e3299ce47cc1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53f0a430bbe51a8830c7fd110800a27e712d54373a73c524b81e3299ce47cc1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53f0a430bbe51a8830c7fd110800a27e712d54373a73c524b81e3299ce47cc1b", kill_on_drop: false }`
[INFO] [stdout] 53f0a430bbe51a8830c7fd110800a27e712d54373a73c524b81e3299ce47cc1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] b37f9cd71e5342aaaab15b8729b5a6b48c7404516566e97e87aae8a071ff9ae8
[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" "b37f9cd71e5342aaaab15b8729b5a6b48c7404516566e97e87aae8a071ff9ae8", kill_on_drop: false }`
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking spin v0.7.1
[INFO] [stderr]     Checking class_names v0.0.1
[INFO] [stderr]     Checking html_color v0.0.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking cstring v0.0.5
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking hecs v0.3.2
[INFO] [stderr]     Checking callback v0.5.3
[INFO] [stderr]     Checking js v0.3.0
[INFO] [stderr]     Checking web_common v0.4.2
[INFO] [stderr]     Checking web_canvas v0.0.7
[INFO] [stderr]     Checking web_console v0.3.7
[INFO] [stderr]     Checking web_local_storage v0.0.2
[INFO] [stderr]     Checking webcomponent v0.6.2
[INFO] [stderr]     Checking web_random v0.1.5
[INFO] [stderr]     Checking web_timer v0.2.5
[INFO] [stderr]     Checking web-dom v0.3.9
[INFO] [stderr]     Checking web v0.1.15
[INFO] [stderr]     Checking rangoon v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:20:26
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let width: f64 = get_property(&screen, "width");
[INFO] [stdout]    |                    ---   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `f64`, found enum `Option`
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    expected due to this
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `f64`
[INFO] [stdout]               found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:21:27
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let height: f64 = get_property(&screen, "height");
[INFO] [stdout]    |                     ---   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `f64`, found enum `Option`
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     expected due to this
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `f64`
[INFO] [stdout]               found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rangoon` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:20:26
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let width: f64 = get_property(&screen, "width");
[INFO] [stdout]    |                    ---   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `f64`, found enum `Option`
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    expected due to this
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `f64`
[INFO] [stdout]               found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:21:27
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let height: f64 = get_property(&screen, "height");
[INFO] [stdout]    |                     ---   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `f64`, found enum `Option`
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     expected due to this
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected type `f64`
[INFO] [stdout]               found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b37f9cd71e5342aaaab15b8729b5a6b48c7404516566e97e87aae8a071ff9ae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b37f9cd71e5342aaaab15b8729b5a6b48c7404516566e97e87aae8a071ff9ae8", kill_on_drop: false }`
[INFO] [stdout] b37f9cd71e5342aaaab15b8729b5a6b48c7404516566e97e87aae8a071ff9ae8