[INFO] fetching crate buf 0.2.3...
[INFO] testing buf-0.2.3 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate buf 0.2.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate buf 0.2.3 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buf 0.2.3
[INFO] finished tweaking crates.io crate buf 0.2.3
[INFO] tweaked toml for crates.io crate buf 0.2.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43dea572dd474d61a6bed2b2965a01d202b61e6524886d863e10fb32c34ccb57
[INFO] running `Command { std: "docker" "start" "-a" "43dea572dd474d61a6bed2b2965a01d202b61e6524886d863e10fb32c34ccb57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43dea572dd474d61a6bed2b2965a01d202b61e6524886d863e10fb32c34ccb57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43dea572dd474d61a6bed2b2965a01d202b61e6524886d863e10fb32c34ccb57", kill_on_drop: false }`
[INFO] [stdout] 43dea572dd474d61a6bed2b2965a01d202b61e6524886d863e10fb32c34ccb57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0cf4213f72f9161fe5ecdbec6f8966cd064d89354535dbbf65d777b621efbf53
[INFO] running `Command { std: "docker" "start" "-a" "0cf4213f72f9161fe5ecdbec6f8966cd064d89354535dbbf65d777b621efbf53", kill_on_drop: false }`
[INFO] [stderr]    Compiling ptr v0.2.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling hash-table v0.2.5
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling containers v0.9.13
[INFO] [stderr]    Compiling heap v0.1.0
[INFO] [stderr]    Compiling i-o v0.4.7
[INFO] [stderr]    Compiling rel v0.2.0
[INFO] [stderr]    Compiling abort v0.1.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling fallible v0.1.3
[INFO] [stderr] error: Cannot set `RUSTC_BOOTSTRAP=1` from build script of `i-o v0.4.7`.
[INFO] [stderr] note: Crates cannot set `RUSTC_BOOTSTRAP` themselves, as doing so would subvert the stability guarantees of Rust for your project.
[INFO] [stderr] help: If you're sure you want to do this in your project, set the environment variable `RUSTC_BOOTSTRAP=io` before running cargo instead.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0cf4213f72f9161fe5ecdbec6f8966cd064d89354535dbbf65d777b621efbf53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cf4213f72f9161fe5ecdbec6f8966cd064d89354535dbbf65d777b621efbf53", kill_on_drop: false }`
[INFO] [stdout] 0cf4213f72f9161fe5ecdbec6f8966cd064d89354535dbbf65d777b621efbf53