[INFO] fetching crate rooting 0.1.6...
[INFO] checking rooting-0.1.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rooting 0.1.6 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate rooting 0.1.6 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 rooting 0.1.6
[INFO] finished tweaking crates.io crate rooting 0.1.6
[INFO] tweaked toml for crates.io crate rooting 0.1.6 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 23 packages
[INFO] [stderr]       Adding gloo-events v0.1.2 (latest: v0.2.0)
[INFO] [stderr]       Adding gloo-utils v0.1.7 (latest: v0.2.0)
[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]     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-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] 765d6f38a641ae8e866218f2712db6002f2f52fa9739467077b30d846f42cbe8
[INFO] running `Command { std: "docker" "start" "-a" "765d6f38a641ae8e866218f2712db6002f2f52fa9739467077b30d846f42cbe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "765d6f38a641ae8e866218f2712db6002f2f52fa9739467077b30d846f42cbe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "765d6f38a641ae8e866218f2712db6002f2f52fa9739467077b30d846f42cbe8", kill_on_drop: false }`
[INFO] [stdout] 765d6f38a641ae8e866218f2712db6002f2f52fa9739467077b30d846f42cbe8
[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] 7f591f0427a6969c7a294b44d9c9dcbb9205088218c68c35689e19f169800652
[INFO] running `Command { std: "docker" "start" "-a" "7f591f0427a6969c7a294b44d9c9dcbb9205088218c68c35689e19f169800652", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.92
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.92
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.92
[INFO] [stderr]     Checking wasm-bindgen v0.2.92
[INFO] [stderr]     Checking js-sys v0.3.69
[INFO] [stderr]     Checking web-sys v0.3.69
[INFO] [stderr]     Checking gloo-utils v0.1.7
[INFO] [stderr]     Checking gloo-events v0.1.2
[INFO] [stderr]     Checking rooting v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:37:23
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct ScopeValue(Box<dyn ScopeValueTrait_>);
[INFO] [stdout]    |            ---------- ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct ScopeValue(());
[INFO] [stdout]    |                       ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:37:23
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct ScopeValue(Box<dyn ScopeValueTrait_>);
[INFO] [stdout]    |            ---------- ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct ScopeValue(());
[INFO] [stdout]    |                       ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.54s
[INFO] running `Command { std: "docker" "inspect" "7f591f0427a6969c7a294b44d9c9dcbb9205088218c68c35689e19f169800652", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f591f0427a6969c7a294b44d9c9dcbb9205088218c68c35689e19f169800652", kill_on_drop: false }`
[INFO] [stdout] 7f591f0427a6969c7a294b44d9c9dcbb9205088218c68c35689e19f169800652