[INFO] fetching crate optional_struct_internal 0.3.1...
[INFO] building optional_struct_internal-0.3.1 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate optional_struct_internal 0.3.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate optional_struct_internal 0.3.1
[INFO] finished tweaking crates.io crate optional_struct_internal 0.3.1
[INFO] tweaked toml for crates.io crate optional_struct_internal 0.3.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate optional_struct_internal 0.3.1 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d936137a2fc35b6e3d86fcb06c36bca38365dfc8a647276def2a2b42f81a8212
[INFO] running `Command { std: "docker" "start" "-a" "d936137a2fc35b6e3d86fcb06c36bca38365dfc8a647276def2a2b42f81a8212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d936137a2fc35b6e3d86fcb06c36bca38365dfc8a647276def2a2b42f81a8212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d936137a2fc35b6e3d86fcb06c36bca38365dfc8a647276def2a2b42f81a8212", kill_on_drop: false }`
[INFO] [stdout] d936137a2fc35b6e3d86fcb06c36bca38365dfc8a647276def2a2b42f81a8212
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ba9862aa59f96932c48fda47d3b8d4d91d773c5297a5485c4954072605a59d5
[INFO] running `Command { std: "docker" "start" "-a" "2ba9862aa59f96932c48fda47d3b8d4d91d773c5297a5485c4954072605a59d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling optional_struct_internal v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "2ba9862aa59f96932c48fda47d3b8d4d91d773c5297a5485c4954072605a59d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ba9862aa59f96932c48fda47d3b8d4d91d773c5297a5485c4954072605a59d5", kill_on_drop: false }`
[INFO] [stdout] 2ba9862aa59f96932c48fda47d3b8d4d91d773c5297a5485c4954072605a59d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf3d1a0c68d68b736d6294eb374c9a0758715e8f59ce13d6bd8fb5370c4cab89
[INFO] running `Command { std: "docker" "start" "-a" "cf3d1a0c68d68b736d6294eb374c9a0758715e8f59ce13d6bd8fb5370c4cab89", kill_on_drop: false }`
[INFO] [stderr]    Compiling optional_struct_internal v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "cf3d1a0c68d68b736d6294eb374c9a0758715e8f59ce13d6bd8fb5370c4cab89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf3d1a0c68d68b736d6294eb374c9a0758715e8f59ce13d6bd8fb5370c4cab89", kill_on_drop: false }`
[INFO] [stdout] cf3d1a0c68d68b736d6294eb374c9a0758715e8f59ce13d6bd8fb5370c4cab89