[INFO] fetching crate double-buffer 1.0.0...
[INFO] checking double-buffer-1.0.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate double-buffer 1.0.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate double-buffer 1.0.0 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 double-buffer 1.0.0
[INFO] finished tweaking crates.io crate double-buffer 1.0.0
[INFO] tweaked toml for crates.io crate double-buffer 1.0.0 written to /workspace/builds/worker-4-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 71 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[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]     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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 04f2e73babb32864fe13f1abd006290a999104142377ad2649a6b1ceb729b4a6
[INFO] running `Command { std: "docker" "start" "-a" "04f2e73babb32864fe13f1abd006290a999104142377ad2649a6b1ceb729b4a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04f2e73babb32864fe13f1abd006290a999104142377ad2649a6b1ceb729b4a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04f2e73babb32864fe13f1abd006290a999104142377ad2649a6b1ceb729b4a6", kill_on_drop: false }`
[INFO] [stdout] 04f2e73babb32864fe13f1abd006290a999104142377ad2649a6b1ceb729b4a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 6840ff6eb01631e968e270f59a954c17e3d1204f2d125848c6f34d8b4ee745ec
[INFO] running `Command { std: "docker" "start" "-a" "6840ff6eb01631e968e270f59a954c17e3d1204f2d125848c6f34d8b4ee745ec", kill_on_drop: false }`
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]     Checking half v2.4.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking double-buffer v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking clap v4.5.4
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.98s
[INFO] running `Command { std: "docker" "inspect" "6840ff6eb01631e968e270f59a954c17e3d1204f2d125848c6f34d8b4ee745ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6840ff6eb01631e968e270f59a954c17e3d1204f2d125848c6f34d8b4ee745ec", kill_on_drop: false }`
[INFO] [stdout] 6840ff6eb01631e968e270f59a954c17e3d1204f2d125848c6f34d8b4ee745ec
[INFO] checking double-buffer-1.0.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate double-buffer 1.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate double-buffer 1.0.0 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 double-buffer 1.0.0
[INFO] finished tweaking crates.io crate double-buffer 1.0.0
[INFO] tweaked toml for crates.io crate double-buffer 1.0.0 written to /workspace/builds/worker-4-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]     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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 552a8c7acc87562bf1b14a74c4205f2abdc625e5d6b8815a91370102e7f9ab03
[INFO] running `Command { std: "docker" "start" "-a" "552a8c7acc87562bf1b14a74c4205f2abdc625e5d6b8815a91370102e7f9ab03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "552a8c7acc87562bf1b14a74c4205f2abdc625e5d6b8815a91370102e7f9ab03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "552a8c7acc87562bf1b14a74c4205f2abdc625e5d6b8815a91370102e7f9ab03", kill_on_drop: false }`
[INFO] [stdout] 552a8c7acc87562bf1b14a74c4205f2abdc625e5d6b8815a91370102e7f9ab03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 93bc230d65674709e684d66396cc76c103c5c93e172bed659617781fa04ef8e0
[INFO] running `Command { std: "docker" "start" "-a" "93bc230d65674709e684d66396cc76c103c5c93e172bed659617781fa04ef8e0", kill_on_drop: false }`
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking half v2.4.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking double-buffer v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking clap v4.5.4
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.70s
[INFO] running `Command { std: "docker" "inspect" "93bc230d65674709e684d66396cc76c103c5c93e172bed659617781fa04ef8e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93bc230d65674709e684d66396cc76c103c5c93e172bed659617781fa04ef8e0", kill_on_drop: false }`
[INFO] [stdout] 93bc230d65674709e684d66396cc76c103c5c93e172bed659617781fa04ef8e0