[INFO] fetching crate x-core 0.1.0...
[INFO] checking x-core-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate x-core 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate x-core 0.1.0 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 x-core 0.1.0
[INFO] finished tweaking crates.io crate x-core 0.1.0
[INFO] tweaked toml for crates.io crate x-core 0.1.0 written to /workspace/builds/worker-0-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 80 packages
[INFO] [stderr]       Adding atomicwrites v0.2.5 (latest: v0.4.3)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding cargo_metadata v0.12.3 (latest: v0.18.1)
[INFO] [stderr]       Adding cfg-expr v0.7.4 (latest: v0.15.7)
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding determinator v0.3.0 (latest: v0.12.0)
[INFO] [stderr]       Adding diffus v0.9.1 (latest: v0.10.0)
[INFO] [stderr]       Adding diffy v0.2.2 (latest: v0.3.0)
[INFO] [stderr]       Adding fixedbitset v0.2.0 (latest: v0.5.6)
[INFO] [stderr]       Adding guppy v0.8.0 (latest: v0.17.5)
[INFO] [stderr]       Adding guppy-summaries v0.4.0 (latest: v0.7.1)
[INFO] [stderr]       Adding hakari v0.2.0 (latest: v0.17.2)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding indoc v1.0.9 (latest: v2.0.5)
[INFO] [stderr]       Adding itertools v0.8.2 (latest: v0.12.1)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding nix v0.14.1 (latest: v0.28.0)
[INFO] [stderr]       Adding petgraph v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[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 rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding remove_dir_all v0.5.3 (latest: v0.8.2)
[INFO] [stderr]       Adding semver v0.11.0 (latest: v1.0.22)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding target-spec v0.7.0 (latest: v3.1.0)
[INFO] [stderr]       Adding toml v0.5.11 (latest: v0.8.12)
[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 nested v0.1.1
[INFO] [stderr]   Downloaded guppy-summaries v0.4.0
[INFO] [stderr]   Downloaded diffy v0.2.2
[INFO] [stderr]   Downloaded atomicwrites v0.2.5
[INFO] [stderr]   Downloaded determinator v0.3.0
[INFO] [stderr]   Downloaded diffus v0.9.1
[INFO] [stderr]   Downloaded target-spec v0.7.0
[INFO] [stderr]   Downloaded guppy v0.8.0
[INFO] [stderr]   Downloaded cfg-expr v0.7.4
[INFO] [stderr]   Downloaded hakari v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 79ef53043bb6f82bffe30a744e1322da5f3fc9c3c0545fffd8d8cf955360649e
[INFO] running `Command { std: "docker" "start" "-a" "79ef53043bb6f82bffe30a744e1322da5f3fc9c3c0545fffd8d8cf955360649e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79ef53043bb6f82bffe30a744e1322da5f3fc9c3c0545fffd8d8cf955360649e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79ef53043bb6f82bffe30a744e1322da5f3fc9c3c0545fffd8d8cf955360649e", kill_on_drop: false }`
[INFO] [stdout] 79ef53043bb6f82bffe30a744e1322da5f3fc9c3c0545fffd8d8cf955360649e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 487ad329f08ab872a6158d08e5862409b1ddb69a14384a9edcb1e80b58a8c3bb
[INFO] running `Command { std: "docker" "start" "-a" "487ad329f08ab872a6158d08e5862409b1ddb69a14384a9edcb1e80b58a8c3bb", kill_on_drop: false }`
[INFO] [stderr]     Checking ucd-trie v0.1.6
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling target-spec v0.7.0
[INFO] [stderr]     Checking cargo-platform v0.1.8
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking cfg-expr v0.7.4
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking nested v0.1.1
[INFO] [stderr]     Checking pest v2.7.9
[INFO] [stderr]     Checking supercow v0.1.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking pathdiff v0.2.1
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking diffy v0.2.2
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking diffus v0.9.1
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking semver-parser v0.10.2
[INFO] [stderr]     Checking semver v0.11.0
[INFO] [stderr]     Checking guppy-summaries v0.4.0
[INFO] [stderr]     Checking cargo_metadata v0.12.3
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]     Checking guppy v0.8.0
[INFO] [stderr]     Checking atomicwrites v0.2.5
[INFO] [stderr]     Checking determinator v0.3.0
[INFO] [stderr]     Checking hakari v0.2.0
[INFO] [stderr]     Checking rental v0.5.6
[INFO] [stderr]     Checking x-core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.12s
[INFO] running `Command { std: "docker" "inspect" "487ad329f08ab872a6158d08e5862409b1ddb69a14384a9edcb1e80b58a8c3bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "487ad329f08ab872a6158d08e5862409b1ddb69a14384a9edcb1e80b58a8c3bb", kill_on_drop: false }`
[INFO] [stdout] 487ad329f08ab872a6158d08e5862409b1ddb69a14384a9edcb1e80b58a8c3bb
[INFO] checking x-core-0.1.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate x-core 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate x-core 0.1.0 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 x-core 0.1.0
[INFO] finished tweaking crates.io crate x-core 0.1.0
[INFO] tweaked toml for crates.io crate x-core 0.1.0 written to /workspace/builds/worker-0-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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4a5a4b95de4325ce84946769399b5c6373bc82b2fb3bbab4a1cf6eb8f8e07b0a
[INFO] running `Command { std: "docker" "start" "-a" "4a5a4b95de4325ce84946769399b5c6373bc82b2fb3bbab4a1cf6eb8f8e07b0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a5a4b95de4325ce84946769399b5c6373bc82b2fb3bbab4a1cf6eb8f8e07b0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a5a4b95de4325ce84946769399b5c6373bc82b2fb3bbab4a1cf6eb8f8e07b0a", kill_on_drop: false }`
[INFO] [stdout] 4a5a4b95de4325ce84946769399b5c6373bc82b2fb3bbab4a1cf6eb8f8e07b0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 8de46c90543c6e21675c363ab90c7e9f1979c3194ce4aa42df9c66c4f90941a0
[INFO] running `Command { std: "docker" "start" "-a" "8de46c90543c6e21675c363ab90c7e9f1979c3194ce4aa42df9c66c4f90941a0", kill_on_drop: false }`
[INFO] [stderr]     Checking ucd-trie v0.1.6
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling target-spec v0.7.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking cfg-expr v0.7.4
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking supercow v0.1.0
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking cargo-platform v0.1.8
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking nested v0.1.1
[INFO] [stderr]     Checking pest v2.7.9
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking pathdiff v0.2.1
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]     Checking diffy v0.2.2
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking diffus v0.9.1
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking semver-parser v0.10.2
[INFO] [stderr]     Checking semver v0.11.0
[INFO] [stderr]     Checking cargo_metadata v0.12.3
[INFO] [stderr]     Checking guppy-summaries v0.4.0
[INFO] [stderr]     Checking guppy v0.8.0
[INFO] [stderr]     Checking atomicwrites v0.2.5
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]     Checking determinator v0.3.0
[INFO] [stderr]     Checking hakari v0.2.0
[INFO] [stderr]     Checking rental v0.5.6
[INFO] [stderr]     Checking x-core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.72s
[INFO] running `Command { std: "docker" "inspect" "8de46c90543c6e21675c363ab90c7e9f1979c3194ce4aa42df9c66c4f90941a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8de46c90543c6e21675c363ab90c7e9f1979c3194ce4aa42df9c66c4f90941a0", kill_on_drop: false }`
[INFO] [stdout] 8de46c90543c6e21675c363ab90c7e9f1979c3194ce4aa42df9c66c4f90941a0