[INFO] fetching crate puffin 0.18.0...
[INFO] checking puffin-0.18.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate puffin 0.18.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate puffin 0.18.0 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 puffin 0.18.0
[INFO] finished tweaking crates.io crate puffin 0.18.0
[INFO] tweaked toml for crates.io crate puffin 0.18.0 written to /workspace/builds/worker-6-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 102 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding ruzstd v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding web-time v0.2.4 (latest: v1.1.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding zstd v0.12.4 (latest: v0.13.1)
[INFO] [stderr]       Adding zstd-safe v6.0.6 (latest: v7.1.0)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded web-time v0.2.4
[INFO] [stderr]   Downloaded thiserror-core v1.0.50
[INFO] [stderr]   Downloaded thiserror-core-impl v1.0.50
[INFO] [stderr]   Downloaded ruzstd v0.4.0
[INFO] [stderr]   Downloaded lz4_flex v0.11.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2cb0db2e09f228bdbf3878fb2cb5338105babca8ee2e77b279bb952a65c6dcf5
[INFO] running `Command { std: "docker" "start" "-a" "2cb0db2e09f228bdbf3878fb2cb5338105babca8ee2e77b279bb952a65c6dcf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2cb0db2e09f228bdbf3878fb2cb5338105babca8ee2e77b279bb952a65c6dcf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cb0db2e09f228bdbf3878fb2cb5338105babca8ee2e77b279bb952a65c6dcf5", kill_on_drop: false }`
[INFO] [stdout] 2cb0db2e09f228bdbf3878fb2cb5338105babca8ee2e77b279bb952a65c6dcf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d80d63b1aa0918b523422fd51ee740fed75498d2c6e0887b44f96c8205d6d531
[INFO] running `Command { std: "docker" "start" "-a" "d80d63b1aa0918b523422fd51ee740fed75498d2c6e0887b44f96c8205d6d531", kill_on_drop: false }`
[INFO] [stderr]     Checking puffin v0.18.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stdout] warning: enum `CompressionKind` is never used
[INFO] [stdout]    --> src/frame_data.rs:155:6
[INFO] [stdout]     |
[INFO] [stdout] 155 | enum CompressionKind {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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] [stdout] warning: enum `CompressionKind` is never used
[INFO] [stdout]    --> src/frame_data.rs:155:6
[INFO] [stdout]     |
[INFO] [stdout] 155 | enum CompressionKind {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.68s
[INFO] running `Command { std: "docker" "inspect" "d80d63b1aa0918b523422fd51ee740fed75498d2c6e0887b44f96c8205d6d531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d80d63b1aa0918b523422fd51ee740fed75498d2c6e0887b44f96c8205d6d531", kill_on_drop: false }`
[INFO] [stdout] d80d63b1aa0918b523422fd51ee740fed75498d2c6e0887b44f96c8205d6d531
[INFO] checking puffin-0.18.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate puffin 0.18.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate puffin 0.18.0 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 puffin 0.18.0
[INFO] finished tweaking crates.io crate puffin 0.18.0
[INFO] tweaked toml for crates.io crate puffin 0.18.0 written to /workspace/builds/worker-6-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d73db9d784d66a7c8c53b853811e229290f2e8c1d1968e87fbd6a9abf8253841
[INFO] running `Command { std: "docker" "start" "-a" "d73db9d784d66a7c8c53b853811e229290f2e8c1d1968e87fbd6a9abf8253841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d73db9d784d66a7c8c53b853811e229290f2e8c1d1968e87fbd6a9abf8253841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d73db9d784d66a7c8c53b853811e229290f2e8c1d1968e87fbd6a9abf8253841", kill_on_drop: false }`
[INFO] [stdout] d73db9d784d66a7c8c53b853811e229290f2e8c1d1968e87fbd6a9abf8253841
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2039045af3ce2d5dafd280aa6076ae2b453f0820d9b1361ceb2737dbf11d4bd3
[INFO] running `Command { std: "docker" "start" "-a" "2039045af3ce2d5dafd280aa6076ae2b453f0820d9b1361ceb2737dbf11d4bd3", kill_on_drop: false }`
[INFO] [stderr]     Checking puffin v0.18.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stdout] warning: enum `CompressionKind` is never used
[INFO] [stdout]    --> src/frame_data.rs:155:6
[INFO] [stdout]     |
[INFO] [stdout] 155 | enum CompressionKind {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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] [stdout] warning: enum `CompressionKind` is never used
[INFO] [stdout]    --> src/frame_data.rs:155:6
[INFO] [stdout]     |
[INFO] [stdout] 155 | enum CompressionKind {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.74s
[INFO] running `Command { std: "docker" "inspect" "2039045af3ce2d5dafd280aa6076ae2b453f0820d9b1361ceb2737dbf11d4bd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2039045af3ce2d5dafd280aa6076ae2b453f0820d9b1361ceb2737dbf11d4bd3", kill_on_drop: false }`
[INFO] [stdout] 2039045af3ce2d5dafd280aa6076ae2b453f0820d9b1361ceb2737dbf11d4bd3