[INFO] fetching crate unbug 0.4.0...
[INFO] building unbug-0.4.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate unbug 0.4.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate unbug 0.4.0
[INFO] finished tweaking crates.io crate unbug 0.4.0
[INFO] tweaked toml for crates.io crate unbug 0.4.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unbug 0.4.0 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] crate crates.io crate unbug 0.4.0 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6d6e075d25bc3b4ffabf4bd615e14589dc4c24a2bc0e6986ad8f7184f8ee5639
[INFO] running `Command { std: "docker" "start" "-a" "6d6e075d25bc3b4ffabf4bd615e14589dc4c24a2bc0e6986ad8f7184f8ee5639", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d6e075d25bc3b4ffabf4bd615e14589dc4c24a2bc0e6986ad8f7184f8ee5639", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d6e075d25bc3b4ffabf4bd615e14589dc4c24a2bc0e6986ad8f7184f8ee5639", kill_on_drop: false }`
[INFO] [stdout] 6d6e075d25bc3b4ffabf4bd615e14589dc4c24a2bc0e6986ad8f7184f8ee5639
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a9b5291c9c27061932fba330d7b0366766d8651ab3fc11bdf19d5ee2ba076258
[INFO] running `Command { std: "docker" "start" "-a" "a9b5291c9c27061932fba330d7b0366766d8651ab3fc11bdf19d5ee2ba076258", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling dbg_breakpoint v0.1.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling unbug v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.00s
[INFO] running `Command { std: "docker" "inspect" "a9b5291c9c27061932fba330d7b0366766d8651ab3fc11bdf19d5ee2ba076258", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9b5291c9c27061932fba330d7b0366766d8651ab3fc11bdf19d5ee2ba076258", kill_on_drop: false }`
[INFO] [stdout] a9b5291c9c27061932fba330d7b0366766d8651ab3fc11bdf19d5ee2ba076258
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 255c2094dfb7e5ab547a5bb941efb3717a9c8d2ecdf6742d0fd378d99e97c6e3
[INFO] running `Command { std: "docker" "start" "-a" "255c2094dfb7e5ab547a5bb941efb3717a9c8d2ecdf6742d0fd378d99e97c6e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling unbug v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "255c2094dfb7e5ab547a5bb941efb3717a9c8d2ecdf6742d0fd378d99e97c6e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "255c2094dfb7e5ab547a5bb941efb3717a9c8d2ecdf6742d0fd378d99e97c6e3", kill_on_drop: false }`
[INFO] [stdout] 255c2094dfb7e5ab547a5bb941efb3717a9c8d2ecdf6742d0fd378d99e97c6e3