[INFO] fetching crate jcers 0.1.2...
[INFO] checking jcers-0.1.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate jcers 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate jcers 0.1.2 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 jcers 0.1.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate jcers 0.1.2
[INFO] tweaked toml for crates.io crate jcers 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate jcers 0.1.2 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]     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]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.96
[INFO] [stderr]   Downloaded jcers_proc v0.1.0
[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] f9eb4446d9894ecef7b861e0cae88c459d11c7674ff1bf2c6f3b9212e3f7174c
[INFO] running `Command { std: "docker" "start" "-a" "f9eb4446d9894ecef7b861e0cae88c459d11c7674ff1bf2c6f3b9212e3f7174c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9eb4446d9894ecef7b861e0cae88c459d11c7674ff1bf2c6f3b9212e3f7174c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9eb4446d9894ecef7b861e0cae88c459d11c7674ff1bf2c6f3b9212e3f7174c", kill_on_drop: false }`
[INFO] [stdout] f9eb4446d9894ecef7b861e0cae88c459d11c7674ff1bf2c6f3b9212e3f7174c
[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] 2534a99b3a96aa269c22cf6314c582070a2a1ccaba630b982c7408be16af15e4
[INFO] running `Command { std: "docker" "start" "-a" "2534a99b3a96aa269c22cf6314c582070a2a1ccaba630b982c7408be16af15e4", kill_on_drop: false }`
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking jcers v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "2534a99b3a96aa269c22cf6314c582070a2a1ccaba630b982c7408be16af15e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2534a99b3a96aa269c22cf6314c582070a2a1ccaba630b982c7408be16af15e4", kill_on_drop: false }`
[INFO] [stdout] 2534a99b3a96aa269c22cf6314c582070a2a1ccaba630b982c7408be16af15e4