[INFO] fetching crate unicode-segmentation 1.10.1...
[INFO] checking unicode-segmentation-1.10.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate unicode-segmentation 1.10.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate unicode-segmentation 1.10.1 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 unicode-segmentation 1.10.1
[INFO] finished tweaking crates.io crate unicode-segmentation 1.10.1
[INFO] tweaked toml for crates.io crate unicode-segmentation 1.10.1 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 72 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[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 v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding env_logger v0.5.13 (latest: v0.11.3)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding humantime v1.3.0 (latest: v2.1.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] [stderr]       Adding quickcheck v0.7.2 (latest: v1.0.3)
[INFO] [stderr]       Adding rand v0.5.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.2.2 (latest: v0.6.4)
[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 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quickcheck v0.7.2
[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] f0ebe79a786e0f8f8ab18cb137d894f745e34a560f2abde954d0eea46bda18f3
[INFO] running `Command { std: "docker" "start" "-a" "f0ebe79a786e0f8f8ab18cb137d894f745e34a560f2abde954d0eea46bda18f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0ebe79a786e0f8f8ab18cb137d894f745e34a560f2abde954d0eea46bda18f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0ebe79a786e0f8f8ab18cb137d894f745e34a560f2abde954d0eea46bda18f3", kill_on_drop: false }`
[INFO] [stdout] f0ebe79a786e0f8f8ab18cb137d894f745e34a560f2abde954d0eea46bda18f3
[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] d3bf5fe59ac8a391473d73a5a20e990b7416f862d9e38c316ed8bff537b0c175
[INFO] running `Command { std: "docker" "start" "-a" "d3bf5fe59ac8a391473d73a5a20e990b7416f862d9e38c316ed8bff537b0c175", kill_on_drop: false }`
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking unicode-segmentation v1.10.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking quickcheck v0.7.2
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: the item `unicode_segmentation` is imported redundantly
[INFO] [stdout]  --> benches/graphemes.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use unicode_segmentation;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^ the item `unicode_segmentation` 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 5.15s
[INFO] running `Command { std: "docker" "inspect" "d3bf5fe59ac8a391473d73a5a20e990b7416f862d9e38c316ed8bff537b0c175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3bf5fe59ac8a391473d73a5a20e990b7416f862d9e38c316ed8bff537b0c175", kill_on_drop: false }`
[INFO] [stdout] d3bf5fe59ac8a391473d73a5a20e990b7416f862d9e38c316ed8bff537b0c175
[INFO] checking unicode-segmentation-1.10.1 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate unicode-segmentation 1.10.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate unicode-segmentation 1.10.1 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 unicode-segmentation 1.10.1
[INFO] finished tweaking crates.io crate unicode-segmentation 1.10.1
[INFO] tweaked toml for crates.io crate unicode-segmentation 1.10.1 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] 7a4f34849f61bd453694babe1e6acd055fe27c37a8ebcfd77adb2862267cdb47
[INFO] running `Command { std: "docker" "start" "-a" "7a4f34849f61bd453694babe1e6acd055fe27c37a8ebcfd77adb2862267cdb47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a4f34849f61bd453694babe1e6acd055fe27c37a8ebcfd77adb2862267cdb47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a4f34849f61bd453694babe1e6acd055fe27c37a8ebcfd77adb2862267cdb47", kill_on_drop: false }`
[INFO] [stdout] 7a4f34849f61bd453694babe1e6acd055fe27c37a8ebcfd77adb2862267cdb47
[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] a4fb3c57d65997de455842ed2a9582eb0eea1fb1641f7fc58b8b4cececf2f8a5
[INFO] running `Command { std: "docker" "start" "-a" "a4fb3c57d65997de455842ed2a9582eb0eea1fb1641f7fc58b8b4cececf2f8a5", kill_on_drop: false }`
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking unicode-segmentation v1.10.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking quickcheck v0.7.2
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: the item `unicode_segmentation` is imported redundantly
[INFO] [stdout]  --> benches/graphemes.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use unicode_segmentation;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^ the item `unicode_segmentation` 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 4.70s
[INFO] running `Command { std: "docker" "inspect" "a4fb3c57d65997de455842ed2a9582eb0eea1fb1641f7fc58b8b4cececf2f8a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4fb3c57d65997de455842ed2a9582eb0eea1fb1641f7fc58b8b4cececf2f8a5", kill_on_drop: false }`
[INFO] [stdout] a4fb3c57d65997de455842ed2a9582eb0eea1fb1641f7fc58b8b4cececf2f8a5