[INFO] fetching crate remote-canvas 1.0.4...
[INFO] checking remote-canvas-1.0.4 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate remote-canvas 1.0.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate remote-canvas 1.0.4 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate remote-canvas 1.0.4
[INFO] finished tweaking crates.io crate remote-canvas 1.0.4
[INFO] tweaked toml for crates.io crate remote-canvas 1.0.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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] a5277904e180ef0de2ff463924014a9e4ef57caae990a680aa5184ba0da21d9c
[INFO] running `Command { std: "docker" "start" "-a" "a5277904e180ef0de2ff463924014a9e4ef57caae990a680aa5184ba0da21d9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5277904e180ef0de2ff463924014a9e4ef57caae990a680aa5184ba0da21d9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5277904e180ef0de2ff463924014a9e4ef57caae990a680aa5184ba0da21d9c", kill_on_drop: false }`
[INFO] [stdout] a5277904e180ef0de2ff463924014a9e4ef57caae990a680aa5184ba0da21d9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e15647522df13f99ba47b68970529209135542c7bd8d4fde3f90669202f9e9d7
[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" "e15647522df13f99ba47b68970529209135542c7bd8d4fde3f90669202f9e9d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
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[INFO] [stderr]     Checking awc v1.0.1
[INFO] [stderr]     Checking actix-web v2.0.0
[INFO] [stderr]     Checking remote-canvas v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `ok_or_else` found for enum `std::result::Result<websocket::WsMessageResponse, async_std::sync::RecvError>` in the current scope
[INFO] [stdout]    --> src/canvas.rs:277:14
[INFO] [stdout]     |
[INFO] [stdout] 277 |             .ok_or_else(|| canvas_error!("failed to receive response from client") as Error)
[INFO] [stdout]     |              ^^^^^^^^^^ help: there is an associated function with a similar name: `map_or_else`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `ok_or_else` found for enum `std::result::Result<websocket::WsMessageResponse, async_std::sync::RecvError>` in the current scope
[INFO] [stdout]    --> src/canvas.rs:277:14
[INFO] [stdout]     |
[INFO] [stdout] 277 |             .ok_or_else(|| canvas_error!("failed to receive response from client") as Error)
[INFO] [stdout]     |              ^^^^^^^^^^ help: there is an associated function with a similar name: `map_or_else`
[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 E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `remote-canvas`
[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] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e15647522df13f99ba47b68970529209135542c7bd8d4fde3f90669202f9e9d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e15647522df13f99ba47b68970529209135542c7bd8d4fde3f90669202f9e9d7", kill_on_drop: false }`
[INFO] [stdout] e15647522df13f99ba47b68970529209135542c7bd8d4fde3f90669202f9e9d7