[INFO] fetching crate once_self_cell 0.6.3...
[INFO] checking once_self_cell-0.6.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate once_self_cell 0.6.3 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate once_self_cell 0.6.3 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 once_self_cell 0.6.3
[INFO] finished tweaking crates.io crate once_self_cell 0.6.3
[INFO] tweaked toml for crates.io crate once_self_cell 0.6.3 written to /workspace/builds/worker-6-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]      Locking 28 packages
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 555ef011981c3dbd582a57f566a75d4f68249e61dd5ef8b6784e5e9796826a7c
[INFO] running `Command { std: "docker" "start" "-a" "555ef011981c3dbd582a57f566a75d4f68249e61dd5ef8b6784e5e9796826a7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "555ef011981c3dbd582a57f566a75d4f68249e61dd5ef8b6784e5e9796826a7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "555ef011981c3dbd582a57f566a75d4f68249e61dd5ef8b6784e5e9796826a7c", kill_on_drop: false }`
[INFO] [stdout] 555ef011981c3dbd582a57f566a75d4f68249e61dd5ef8b6784e5e9796826a7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] b174eaeb1717318c8f82ed31bc451f930a226b0e2a30f5ed5972b4fec882057f
[INFO] running `Command { std: "docker" "start" "-a" "b174eaeb1717318c8f82ed31bc451f930a226b0e2a30f5ed5972b4fec882057f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking winnow v0.6.5
[INFO] [stderr]    Compiling trybuild v1.0.91
[INFO] [stderr]     Checking once_self_cell v0.6.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking toml_edit v0.22.9
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking toml v0.8.12
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.41s
[INFO] running `Command { std: "docker" "inspect" "b174eaeb1717318c8f82ed31bc451f930a226b0e2a30f5ed5972b4fec882057f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b174eaeb1717318c8f82ed31bc451f930a226b0e2a30f5ed5972b4fec882057f", kill_on_drop: false }`
[INFO] [stdout] b174eaeb1717318c8f82ed31bc451f930a226b0e2a30f5ed5972b4fec882057f