[INFO] cloning repository https://github.com/Diggsey/rust-workshop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Diggsey/rust-workshop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiggsey%2Frust-workshop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiggsey%2Frust-workshop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e83bd60a250beeced282b06edb20a13ef5d13d94
[INFO] checking Diggsey/rust-workshop against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiggsey%2Frust-workshop" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Diggsey/rust-workshop 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 git repo https://github.com/Diggsey/rust-workshop
[INFO] finished tweaking git repo https://github.com/Diggsey/rust-workshop
[INFO] tweaked toml for git repo https://github.com/Diggsey/rust-workshop written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Diggsey/rust-workshop 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 crossbeam-deque v0.8.2
[INFO] [stderr]   Downloaded snap v1.0.5
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.10
[INFO] [stderr]   Downloaded thiserror-impl v1.0.35
[INFO] [stderr]   Downloaded heapless v0.7.16
[INFO] [stderr]   Downloaded ordered-float v3.0.0
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded bitfield v0.13.2
[INFO] [stderr]   Downloaded anyhow v1.0.64
[INFO] [stderr]   Downloaded embedded-hal v0.2.7
[INFO] [stderr]   Downloaded cortex-m v0.7.6
[INFO] [stderr]   Downloaded riscv v0.7.0
[INFO] [stderr]   Downloaded semver v1.0.14
[INFO] [stderr]   Downloaded nb v1.0.0
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded vcell v0.1.3
[INFO] [stderr]   Downloaded volatile-register v0.2.1
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded riscv-target v0.1.2
[INFO] [stderr]   Downloaded critical-section v0.2.7
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.10
[INFO] [stderr]   Downloaded postcard v1.0.2
[INFO] [stderr]   Downloaded thiserror v1.0.35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 475ab5e306f5d9b812246ad4b4caeac82891827ac8b0a86d741c256a879323b6
[INFO] running `Command { std: "docker" "start" "-a" "475ab5e306f5d9b812246ad4b4caeac82891827ac8b0a86d741c256a879323b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "475ab5e306f5d9b812246ad4b4caeac82891827ac8b0a86d741c256a879323b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "475ab5e306f5d9b812246ad4b4caeac82891827ac8b0a86d741c256a879323b6", kill_on_drop: false }`
[INFO] [stdout] 475ab5e306f5d9b812246ad4b4caeac82891827ac8b0a86d741c256a879323b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 956996dac063247c8275f55c56457ee38877781ea4a0c3c956a26f2a1cf91b51
[INFO] running `Command { std: "docker" "start" "-a" "956996dac063247c8275f55c56457ee38877781ea4a0c3c956a26f2a1cf91b51", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling semver v1.0.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking once_cell v1.14.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling lock_api v0.4.8
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling anyhow v1.0.64
[INFO] [stderr]    Compiling thiserror v1.0.35
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling snap v1.0.5
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking cobs v0.2.3
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling heapless v0.7.16
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking ordered-float v3.0.0
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.35
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking postcard v1.0.2
[INFO] [stderr]     Checking rust-workshop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.79s
[INFO] running `Command { std: "docker" "inspect" "956996dac063247c8275f55c56457ee38877781ea4a0c3c956a26f2a1cf91b51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "956996dac063247c8275f55c56457ee38877781ea4a0c3c956a26f2a1cf91b51", kill_on_drop: false }`
[INFO] [stdout] 956996dac063247c8275f55c56457ee38877781ea4a0c3c956a26f2a1cf91b51
[INFO] checking Diggsey/rust-workshop against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiggsey%2Frust-workshop" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Diggsey/rust-workshop 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 git repo https://github.com/Diggsey/rust-workshop
[INFO] finished tweaking git repo https://github.com/Diggsey/rust-workshop
[INFO] tweaked toml for git repo https://github.com/Diggsey/rust-workshop written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Diggsey/rust-workshop 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] d87bfb81d7f420c9dbdfdc4f127ad9ac55db979c2f15c78ee97391cdf7cac68d
[INFO] running `Command { std: "docker" "start" "-a" "d87bfb81d7f420c9dbdfdc4f127ad9ac55db979c2f15c78ee97391cdf7cac68d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d87bfb81d7f420c9dbdfdc4f127ad9ac55db979c2f15c78ee97391cdf7cac68d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d87bfb81d7f420c9dbdfdc4f127ad9ac55db979c2f15c78ee97391cdf7cac68d", kill_on_drop: false }`
[INFO] [stdout] d87bfb81d7f420c9dbdfdc4f127ad9ac55db979c2f15c78ee97391cdf7cac68d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 6a66603d1eea226044f1d1f4f4275cc3f2f547c9f403a3d1f3809f2c88122c72
[INFO] running `Command { std: "docker" "start" "-a" "6a66603d1eea226044f1d1f4f4275cc3f2f547c9f403a3d1f3809f2c88122c72", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling semver v1.0.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking once_cell v1.14.0
[INFO] [stderr]    Compiling lock_api v0.4.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling snap v1.0.5
[INFO] [stderr]    Compiling anyhow v1.0.64
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]    Compiling thiserror v1.0.35
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking cobs v0.2.3
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling heapless v0.7.16
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking ordered-float v3.0.0
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.35
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking postcard v1.0.2
[INFO] [stderr]     Checking rust-workshop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.57s
[INFO] running `Command { std: "docker" "inspect" "6a66603d1eea226044f1d1f4f4275cc3f2f547c9f403a3d1f3809f2c88122c72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a66603d1eea226044f1d1f4f4275cc3f2f547c9f403a3d1f3809f2c88122c72", kill_on_drop: false }`
[INFO] [stdout] 6a66603d1eea226044f1d1f4f4275cc3f2f547c9f403a3d1f3809f2c88122c72