[INFO] fetching crate solver 0.0.2...
[INFO] checking solver-0.0.2 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate solver 0.0.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate solver 0.0.2 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate solver 0.0.2
[INFO] finished tweaking crates.io crate solver 0.0.2
[INFO] tweaked toml for crates.io crate solver 0.0.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5722bdd572f7b5ff3cb2849f266058074642e55d0e53d45404cc20831969fd2a
[INFO] running `Command { std: "docker" "start" "-a" "5722bdd572f7b5ff3cb2849f266058074642e55d0e53d45404cc20831969fd2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5722bdd572f7b5ff3cb2849f266058074642e55d0e53d45404cc20831969fd2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5722bdd572f7b5ff3cb2849f266058074642e55d0e53d45404cc20831969fd2a", kill_on_drop: false }`
[INFO] [stdout] 5722bdd572f7b5ff3cb2849f266058074642e55d0e53d45404cc20831969fd2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93f4163efc38fc3507cc9c97c611923f639e406d5c865c7fc3bb6570a5133199
[INFO] running `Command { std: "docker" "start" "-a" "93f4163efc38fc3507cc9c97c611923f639e406d5c865c7fc3bb6570a5133199", kill_on_drop: false }`
[INFO] [stderr]     Checking solver v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "93f4163efc38fc3507cc9c97c611923f639e406d5c865c7fc3bb6570a5133199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93f4163efc38fc3507cc9c97c611923f639e406d5c865c7fc3bb6570a5133199", kill_on_drop: false }`
[INFO] [stdout] 93f4163efc38fc3507cc9c97c611923f639e406d5c865c7fc3bb6570a5133199