[INFO] cloning repository https://github.com/jonay2000/weblab-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jonay2000/weblab-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonay2000%2Fweblab-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonay2000%2Fweblab-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1005657d469298e07e5918cd3ea289738bb531af
[INFO] checking jonay2000/weblab-rs against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonay2000%2Fweblab-rs" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jonay2000/weblab-rs 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/jonay2000/weblab-rs
[INFO] finished tweaking git repo https://github.com/jonay2000/weblab-rs
[INFO] tweaked toml for git repo https://github.com/jonay2000/weblab-rs written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jonay2000/weblab-rs 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] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sanitize-filename v0.3.0
[INFO] [stderr]   Downloaded simple_xml_serialize v0.3.0
[INFO] [stderr]   Downloaded path-slash v0.1.4
[INFO] [stderr]   Downloaded simple_xml_serialize_macro v0.3.0
[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] 64e065ce5be7e0459d69ad1bc34a464bef8781512752bd723c37e9a6cdcb9760
[INFO] running `Command { std: "docker" "start" "-a" "64e065ce5be7e0459d69ad1bc34a464bef8781512752bd723c37e9a6cdcb9760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64e065ce5be7e0459d69ad1bc34a464bef8781512752bd723c37e9a6cdcb9760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64e065ce5be7e0459d69ad1bc34a464bef8781512752bd723c37e9a6cdcb9760", kill_on_drop: false }`
[INFO] [stdout] 64e065ce5be7e0459d69ad1bc34a464bef8781512752bd723c37e9a6cdcb9760
[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] 14ec0d7e9f0cd886afd19301cd74700fa561bf1ac81ccd105fd282a9cdf158b6
[INFO] running `Command { std: "docker" "start" "-a" "14ec0d7e9f0cd886afd19301cd74700fa561bf1ac81ccd105fd282a9cdf158b6", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking sanitize-filename v0.3.0
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking weblab-assignment-structure v0.2.22 (/opt/rustwide/workdir/weblab-assignment-structure)
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]     Checking path-slash v0.1.4
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking pathdiff v0.2.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.1
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]     Checking proc-macro2 v1.0.36
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling async-trait v0.1.52
[INFO] [stderr]     Checking quote v1.0.15
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking fixedbitset v0.4.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking simple_xml_serialize v0.3.0
[INFO] [stderr]     Checking bzip2 v0.4.3
[INFO] [stderr]     Checking petgraph v0.6.0
[INFO] [stderr]     Checking quickcheck v1.0.3
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling quickcheck_macros v1.0.0
[INFO] [stderr]     Checking tokio v1.17.0
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking zip v0.5.13
[INFO] [stderr]    Compiling simple_xml_serialize_macro v0.3.0
[INFO] [stderr]     Checking clap v3.1.6
[INFO] [stderr]     Checking serde v1.0.136
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking weblab-macros v0.2.22 (/opt/rustwide/workdir/weblab-macros)
[INFO] [stderr]     Checking weblab-docker-runner v0.1.0 (/opt/rustwide/workdir/weblab-docker/user_code)
[INFO] [stderr]     Checking cargo-weblabtest v0.2.11 (/opt/rustwide/workdir/cargo-weblabtest)
[INFO] [stderr]     Checking weblab v0.2.23 (/opt/rustwide/workdir/weblab)
[INFO] [stderr]     Checking tests v0.1.0 (/opt/rustwide/workdir/tests)
[INFO] [stderr]     Checking example-project v0.1.0 (/opt/rustwide/workdir/example-project)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 54.79s
[INFO] running `Command { std: "docker" "inspect" "14ec0d7e9f0cd886afd19301cd74700fa561bf1ac81ccd105fd282a9cdf158b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14ec0d7e9f0cd886afd19301cd74700fa561bf1ac81ccd105fd282a9cdf158b6", kill_on_drop: false }`
[INFO] [stdout] 14ec0d7e9f0cd886afd19301cd74700fa561bf1ac81ccd105fd282a9cdf158b6