[INFO] fetching crate flexgen 0.4.5...
[INFO] checking flexgen-0.4.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate flexgen 0.4.5 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate flexgen 0.4.5 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 flexgen 0.4.5
[INFO] finished tweaking crates.io crate flexgen 0.4.5
[INFO] tweaked toml for crates.io crate flexgen 0.4.5 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate flexgen 0.4.5 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rust-format v0.3.4
[INFO] [stderr]   Downloaded output_vt100 v0.1.3
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded flexstr v0.9.2
[INFO] [stderr]   Downloaded ctor v0.1.22
[INFO] [stderr]   Downloaded indexmap v1.8.1
[INFO] [stderr]   Downloaded pretty_assertions v1.2.1
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.4
[INFO] [stderr]   Downloaded rayon v1.5.2
[INFO] [stderr]   Downloaded syn v1.0.91
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.8
[INFO] [stderr]   Downloaded libc v0.2.124
[INFO] [stderr]   Downloaded rayon-core v1.9.2
[INFO] [stderr]   Downloaded prettyplease v0.1.9
[INFO] [stderr]   Downloaded serde_derive v1.0.136
[INFO] [stderr]   Downloaded serde v1.0.136
[INFO] [stderr]   Downloaded proc-macro2 v1.0.37
[INFO] [stderr]   Downloaded use-builder v0.1.0
[INFO] [stderr]   Downloaded quote-doctest v0.3.2
[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] 50d40a8edd38ed00e3756cd6be8525b2c18636ab7e7ea4ebc75d89eec3873c59
[INFO] running `Command { std: "docker" "start" "-a" "50d40a8edd38ed00e3756cd6be8525b2c18636ab7e7ea4ebc75d89eec3873c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50d40a8edd38ed00e3756cd6be8525b2c18636ab7e7ea4ebc75d89eec3873c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50d40a8edd38ed00e3756cd6be8525b2c18636ab7e7ea4ebc75d89eec3873c59", kill_on_drop: false }`
[INFO] [stdout] 50d40a8edd38ed00e3756cd6be8525b2c18636ab7e7ea4ebc75d89eec3873c59
[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] 15e306739b0b7bd26c8222d05da5c2a1311f3ad3cd7e7311d2465512dc75f5f4
[INFO] running `Command { std: "docker" "start" "-a" "15e306739b0b7bd26c8222d05da5c2a1311f3ad3cd7e7311d2465512dc75f5f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling libc v0.2.124
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.2
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling rayon v1.5.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking heck v0.4.0
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking pretty_assertions v1.2.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking prettyplease v0.1.9
[INFO] [stderr]     Checking use-builder v0.1.0
[INFO] [stderr]     Checking rust-format v0.3.4
[INFO] [stderr]     Checking quote-doctest v0.3.2
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking flexstr v0.9.2
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking flexgen v0.4.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.74s
[INFO] running `Command { std: "docker" "inspect" "15e306739b0b7bd26c8222d05da5c2a1311f3ad3cd7e7311d2465512dc75f5f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15e306739b0b7bd26c8222d05da5c2a1311f3ad3cd7e7311d2465512dc75f5f4", kill_on_drop: false }`
[INFO] [stdout] 15e306739b0b7bd26c8222d05da5c2a1311f3ad3cd7e7311d2465512dc75f5f4
[INFO] checking flexgen-0.4.5 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate flexgen 0.4.5 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate flexgen 0.4.5 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 flexgen 0.4.5
[INFO] finished tweaking crates.io crate flexgen 0.4.5
[INFO] tweaked toml for crates.io crate flexgen 0.4.5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate flexgen 0.4.5 already has a lockfile, it will not be regenerated
[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-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] a0b4d8b64b8edbc1bd490060c70eb6367580ea9ddc81e24ff1c1e819e36e8f27
[INFO] running `Command { std: "docker" "start" "-a" "a0b4d8b64b8edbc1bd490060c70eb6367580ea9ddc81e24ff1c1e819e36e8f27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0b4d8b64b8edbc1bd490060c70eb6367580ea9ddc81e24ff1c1e819e36e8f27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0b4d8b64b8edbc1bd490060c70eb6367580ea9ddc81e24ff1c1e819e36e8f27", kill_on_drop: false }`
[INFO] [stdout] a0b4d8b64b8edbc1bd490060c70eb6367580ea9ddc81e24ff1c1e819e36e8f27
[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] c52e8fcd0f4f3ceaab92bb53976e754820f1bd447bc0c70b60295190d5457a88
[INFO] running `Command { std: "docker" "start" "-a" "c52e8fcd0f4f3ceaab92bb53976e754820f1bd447bc0c70b60295190d5457a88", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling libc v0.2.124
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling rayon-core v1.9.2
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling rayon v1.5.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking heck v0.4.0
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking pretty_assertions v1.2.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking prettyplease v0.1.9
[INFO] [stderr]     Checking use-builder v0.1.0
[INFO] [stderr]     Checking rust-format v0.3.4
[INFO] [stderr]     Checking quote-doctest v0.3.2
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking flexstr v0.9.2
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking flexgen v0.4.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.75s
[INFO] running `Command { std: "docker" "inspect" "c52e8fcd0f4f3ceaab92bb53976e754820f1bd447bc0c70b60295190d5457a88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c52e8fcd0f4f3ceaab92bb53976e754820f1bd447bc0c70b60295190d5457a88", kill_on_drop: false }`
[INFO] [stdout] c52e8fcd0f4f3ceaab92bb53976e754820f1bd447bc0c70b60295190d5457a88