[INFO] fetching crate rings 0.2.0...
[INFO] checking rings-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rings 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate rings 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 rings 0.2.0
[INFO] finished tweaking crates.io crate rings 0.2.0
[INFO] tweaked toml for crates.io crate rings 0.2.0 written to /workspace/builds/worker-5-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 45 packages
[INFO] [stderr]       Adding sauron v0.60.7 (latest: v0.61.0)
[INFO] [stderr]       Adding sauron-core v0.60.7 (latest: v0.61.2)
[INFO] [stderr]       Adding sauron-macro v0.60.7 (latest: v0.61.0)
[INFO] [stderr]       Adding serde-wasm-bindgen v0.5.0 (latest: v0.6.5)
[INFO] [stderr]       Adding siphasher v0.3.11 (latest: v1.0.1)
[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 sauron v0.60.7
[INFO] [stderr]   Downloaded sauron-macro v0.60.7
[INFO] [stderr]   Downloaded sauron-core v0.60.7
[INFO] [stderr]   Downloaded mt-dom v0.59.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 31dd42c8c8dab7234b9213247be6caddd64d992cf380185f60bd6eb44ebc133a
[INFO] running `Command { std: "docker" "start" "-a" "31dd42c8c8dab7234b9213247be6caddd64d992cf380185f60bd6eb44ebc133a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31dd42c8c8dab7234b9213247be6caddd64d992cf380185f60bd6eb44ebc133a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31dd42c8c8dab7234b9213247be6caddd64d992cf380185f60bd6eb44ebc133a", kill_on_drop: false }`
[INFO] [stdout] 31dd42c8c8dab7234b9213247be6caddd64d992cf380185f60bd6eb44ebc133a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 66578518ac3a79125ccfebf1d71f475e5cf94842bf20bcd096e36d6762a34ccd
[INFO] running `Command { std: "docker" "start" "-a" "66578518ac3a79125ccfebf1d71f475e5cf94842bf20bcd096e36d6762a34ccd", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.92
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]    Compiling longest-increasing-subsequence v0.1.0
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling mt-dom v0.59.2
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.92
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]    Compiling syn_derive v0.1.8
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.92
[INFO] [stderr]    Compiling phf v0.11.2
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.92
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]    Compiling rstml v0.11.2
[INFO] [stderr]     Checking js-sys v0.3.69
[INFO] [stderr]     Checking serde-wasm-bindgen v0.5.0
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.42
[INFO] [stderr]     Checking web-sys v0.3.69
[INFO] [stderr]     Checking sauron-core v0.60.7
[INFO] [stderr]    Compiling sauron-macro v0.60.7
[INFO] [stderr]     Checking sauron v0.60.7
[INFO] [stderr]     Checking rings v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 26.31s
[INFO] running `Command { std: "docker" "inspect" "66578518ac3a79125ccfebf1d71f475e5cf94842bf20bcd096e36d6762a34ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66578518ac3a79125ccfebf1d71f475e5cf94842bf20bcd096e36d6762a34ccd", kill_on_drop: false }`
[INFO] [stdout] 66578518ac3a79125ccfebf1d71f475e5cf94842bf20bcd096e36d6762a34ccd