[INFO] fetching crate varnishslog-types 0.5.2...
[INFO] checking varnishslog-types-0.5.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate varnishslog-types 0.5.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate varnishslog-types 0.5.2 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 varnishslog-types 0.5.2
[INFO] finished tweaking crates.io crate varnishslog-types 0.5.2
[INFO] tweaked toml for crates.io crate varnishslog-types 0.5.2 written to /workspace/builds/worker-7-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 52 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding cast v0.2.7 (latest: v0.3.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding cloudabi v0.0.3 (latest: v0.1.0)
[INFO] [stderr]       Adding criterion v0.2.11 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.3.1 (latest: v0.5.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.8.2 (latest: v0.12.1)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_os v0.1.3 (latest: v0.2.2)
[INFO] [stderr]       Adding rand_xoshiro v0.1.0 (latest: v0.6.0)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e4e01079626270a50411fa925a032f12ea4eb26ebc8a9aed04dce198c5339931
[INFO] running `Command { std: "docker" "start" "-a" "e4e01079626270a50411fa925a032f12ea4eb26ebc8a9aed04dce198c5339931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4e01079626270a50411fa925a032f12ea4eb26ebc8a9aed04dce198c5339931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4e01079626270a50411fa925a032f12ea4eb26ebc8a9aed04dce198c5339931", kill_on_drop: false }`
[INFO] [stdout] e4e01079626270a50411fa925a032f12ea4eb26ebc8a9aed04dce198c5339931
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] cd69b51b4aad22c7feab15f5774cc4834c3dfbdcda8814b2f6f68c7340df3ec7
[INFO] running `Command { std: "docker" "start" "-a" "cd69b51b4aad22c7feab15f5774cc4834c3dfbdcda8814b2f6f68c7340df3ec7", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking serde_test v1.0.176
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking linear-map v1.2.0
[INFO] [stderr]     Checking varnishslog-types v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |     use serde_json;
[INFO] [stdout]     |         ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.57s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.2.11
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "cd69b51b4aad22c7feab15f5774cc4834c3dfbdcda8814b2f6f68c7340df3ec7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd69b51b4aad22c7feab15f5774cc4834c3dfbdcda8814b2f6f68c7340df3ec7", kill_on_drop: false }`
[INFO] [stdout] cd69b51b4aad22c7feab15f5774cc4834c3dfbdcda8814b2f6f68c7340df3ec7
[INFO] checking varnishslog-types-0.5.2 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate varnishslog-types 0.5.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate varnishslog-types 0.5.2 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 varnishslog-types 0.5.2
[INFO] finished tweaking crates.io crate varnishslog-types 0.5.2
[INFO] tweaked toml for crates.io crate varnishslog-types 0.5.2 written to /workspace/builds/worker-7-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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 09f01d17629da22847b2ee5db5d23dc7ef315c615adc209a6929c62906f88188
[INFO] running `Command { std: "docker" "start" "-a" "09f01d17629da22847b2ee5db5d23dc7ef315c615adc209a6929c62906f88188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09f01d17629da22847b2ee5db5d23dc7ef315c615adc209a6929c62906f88188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f01d17629da22847b2ee5db5d23dc7ef315c615adc209a6929c62906f88188", kill_on_drop: false }`
[INFO] [stdout] 09f01d17629da22847b2ee5db5d23dc7ef315c615adc209a6929c62906f88188
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 35c97b5d591931b29616375807ef04cea1ac898b06512f74e5b77e52b34bab02
[INFO] running `Command { std: "docker" "start" "-a" "35c97b5d591931b29616375807ef04cea1ac898b06512f74e5b77e52b34bab02", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking serde_test v1.0.176
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking linear-map v1.2.0
[INFO] [stderr]     Checking varnishslog-types v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |     use serde_json;
[INFO] [stdout]     |         ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.11s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.2.11
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "35c97b5d591931b29616375807ef04cea1ac898b06512f74e5b77e52b34bab02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35c97b5d591931b29616375807ef04cea1ac898b06512f74e5b77e52b34bab02", kill_on_drop: false }`
[INFO] [stdout] 35c97b5d591931b29616375807ef04cea1ac898b06512f74e5b77e52b34bab02