[INFO] fetching crate observable-react 0.2.0...
[INFO] checking observable-react-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate observable-react 0.2.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate observable-react 0.2.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate observable-react 0.2.0
[INFO] finished tweaking crates.io crate observable-react 0.2.0
[INFO] tweaked toml for crates.io crate observable-react 0.2.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 28 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded observable-rs v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3f87b56814f2231163cc3f7ef8fb0d03d545b252e1358b6d694e83865256d60
[INFO] running `Command { std: "docker" "start" "-a" "f3f87b56814f2231163cc3f7ef8fb0d03d545b252e1358b6d694e83865256d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3f87b56814f2231163cc3f7ef8fb0d03d545b252e1358b6d694e83865256d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3f87b56814f2231163cc3f7ef8fb0d03d545b252e1358b6d694e83865256d60", kill_on_drop: false }`
[INFO] [stdout] f3f87b56814f2231163cc3f7ef8fb0d03d545b252e1358b6d694e83865256d60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f60411f2d355b4d767cf884c7c95ce4697f67e32ee7ebfa84954c457d7251177
[INFO] running `Command { std: "docker" "start" "-a" "f60411f2d355b4d767cf884c7c95ce4697f67e32ee7ebfa84954c457d7251177", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.92
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking dyn-clone v1.0.17
[INFO] [stderr]     Checking observable-rs v0.2.0
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.42
[INFO] [stderr]     Checking js-sys v0.3.69
[INFO] [stderr]     Checking console_error_panic_hook v0.1.7
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.42
[INFO] [stderr]     Checking wasm-bindgen-test v0.3.42
[INFO] [stderr]     Checking observable-react v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `JsValue` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:13:32
[INFO] [stdout]    |
[INFO] [stdout] 13 | use wasm_bindgen::{prelude::*, JsValue};
[INFO] [stdout]    |                    ----------  ^^^^^^^
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the item `JsValue` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `JsValue` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:13:32
[INFO] [stdout]    |
[INFO] [stdout] 13 | use wasm_bindgen::{prelude::*, JsValue};
[INFO] [stdout]    |                    ----------  ^^^^^^^
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the item `JsValue` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.80s
[INFO] running `Command { std: "docker" "inspect" "f60411f2d355b4d767cf884c7c95ce4697f67e32ee7ebfa84954c457d7251177", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f60411f2d355b4d767cf884c7c95ce4697f67e32ee7ebfa84954c457d7251177", kill_on_drop: false }`
[INFO] [stdout] f60411f2d355b4d767cf884c7c95ce4697f67e32ee7ebfa84954c457d7251177
[INFO] checking observable-react-0.2.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate observable-react 0.2.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate observable-react 0.2.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate observable-react 0.2.0
[INFO] finished tweaking crates.io crate observable-react 0.2.0
[INFO] tweaked toml for crates.io crate observable-react 0.2.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8449a674726d7a7d32f6db1b1b3ea0313fb7a15999c573801ecbebfa91bc3042
[INFO] running `Command { std: "docker" "start" "-a" "8449a674726d7a7d32f6db1b1b3ea0313fb7a15999c573801ecbebfa91bc3042", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8449a674726d7a7d32f6db1b1b3ea0313fb7a15999c573801ecbebfa91bc3042", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8449a674726d7a7d32f6db1b1b3ea0313fb7a15999c573801ecbebfa91bc3042", kill_on_drop: false }`
[INFO] [stdout] 8449a674726d7a7d32f6db1b1b3ea0313fb7a15999c573801ecbebfa91bc3042
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c3bff3f389c70f51b25062f32863d9d1df0a437e8d4b0ad32b1211753cfb5eb
[INFO] running `Command { std: "docker" "start" "-a" "1c3bff3f389c70f51b25062f32863d9d1df0a437e8d4b0ad32b1211753cfb5eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.92
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking observable-rs v0.2.0
[INFO] [stderr]     Checking dyn-clone v1.0.17
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.42
[INFO] [stderr]     Checking js-sys v0.3.69
[INFO] [stderr]     Checking console_error_panic_hook v0.1.7
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.42
[INFO] [stderr]     Checking wasm-bindgen-test v0.3.42
[INFO] [stderr]     Checking observable-react v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `JsValue` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:13:32
[INFO] [stdout]    |
[INFO] [stdout] 13 | use wasm_bindgen::{prelude::*, JsValue};
[INFO] [stdout]    |                    ----------  ^^^^^^^
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the item `JsValue` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `JsValue` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:13:32
[INFO] [stdout]    |
[INFO] [stdout] 13 | use wasm_bindgen::{prelude::*, JsValue};
[INFO] [stdout]    |                    ----------  ^^^^^^^
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the item `JsValue` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.98s
[INFO] running `Command { std: "docker" "inspect" "1c3bff3f389c70f51b25062f32863d9d1df0a437e8d4b0ad32b1211753cfb5eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c3bff3f389c70f51b25062f32863d9d1df0a437e8d4b0ad32b1211753cfb5eb", kill_on_drop: false }`
[INFO] [stdout] 1c3bff3f389c70f51b25062f32863d9d1df0a437e8d4b0ad32b1211753cfb5eb