[INFO] cloning repository https://github.com/modecode22/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/modecode22/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodecode22%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodecode22%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55f23847dfaaf8e1ab9499bcf5ca85dab579dcf3
[INFO] checking modecode22/rust-learning against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodecode22%2Frust-learning" "/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/modecode22/rust-learning 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/modecode22/rust-learning
[INFO] finished tweaking git repo https://github.com/modecode22/rust-learning
[INFO] tweaked toml for git repo https://github.com/modecode22/rust-learning written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/modecode22/rust-learning 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: unused manifest key: dependencies.serde.freatures
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] dbfccad9cd8a69b6ea2e02bc3f6edd20850127f086a2d4aeac906b502113e525
[INFO] running `Command { std: "docker" "start" "-a" "dbfccad9cd8a69b6ea2e02bc3f6edd20850127f086a2d4aeac906b502113e525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbfccad9cd8a69b6ea2e02bc3f6edd20850127f086a2d4aeac906b502113e525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbfccad9cd8a69b6ea2e02bc3f6edd20850127f086a2d4aeac906b502113e525", kill_on_drop: false }`
[INFO] [stdout] dbfccad9cd8a69b6ea2e02bc3f6edd20850127f086a2d4aeac906b502113e525
[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] 0eb84f7a8d995aed9989ecce8651d147c1846ca883dd54349ca9be2fda248f1d
[INFO] running `Command { std: "docker" "start" "-a" "0eb84f7a8d995aed9989ecce8651d147c1846ca883dd54349ca9be2fda248f1d", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: dependencies.serde.freatures
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]     Checking smallvec v1.11.1
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling unicase v2.7.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking cpufeatures v0.2.11
[INFO] [stderr]    Compiling serde v1.0.190
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]    Compiling rustix v0.38.21
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]    Compiling multer v2.1.0
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]     Checking httpdate v1.0.3
[INFO] [stderr]     Checking base64 v0.21.5
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking data-encoding v2.4.0
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]     Checking headers-core v0.2.0
[INFO] [stderr]     Checking encoding_rs v0.8.33
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking rustls-pemfile v1.0.3
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking iana-time-zone v0.1.58
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking socket2 v0.5.4
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking inotify v0.9.6
[INFO] [stderr]     Checking filetime v0.2.22
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking chrono v0.4.31
[INFO] [stderr]     Checking notify v6.1.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking colored v2.0.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha1 v0.10.6
[INFO] [stderr]     Checking headers v0.3.9
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]     Checking tokio v1.33.0
[INFO] [stderr]     Checking tungstenite v0.20.1
[INFO] [stderr]     Checking pin-project v1.1.3
[INFO] [stderr]     Checking tokio-util v0.7.9
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking tokio-tungstenite v0.20.1
[INFO] [stderr]     Checking h2 v0.3.21
[INFO] [stderr]     Checking hyper v0.14.27
[INFO] [stderr]     Checking warp v0.3.6
[INFO] [stderr]     Checking rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 29.93s
[INFO] running `Command { std: "docker" "inspect" "0eb84f7a8d995aed9989ecce8651d147c1846ca883dd54349ca9be2fda248f1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb84f7a8d995aed9989ecce8651d147c1846ca883dd54349ca9be2fda248f1d", kill_on_drop: false }`
[INFO] [stdout] 0eb84f7a8d995aed9989ecce8651d147c1846ca883dd54349ca9be2fda248f1d