[INFO] fetching crate rblake2sum 0.2.1...
[INFO] checking rblake2sum-0.2.1 against try#cbe8532756bbbc4b7f32dda40d05981c8aeffd80 for pr-102129
[INFO] extracting crate rblake2sum 0.2.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rblake2sum 0.2.1 on toolchain cbe8532756bbbc4b7f32dda40d05981c8aeffd80
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cbe8532756bbbc4b7f32dda40d05981c8aeffd80" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rblake2sum 0.2.1
[INFO] finished tweaking crates.io crate rblake2sum 0.2.1
[INFO] tweaked toml for crates.io crate rblake2sum 0.2.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate rblake2sum 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cbe8532756bbbc4b7f32dda40d05981c8aeffd80" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+cbe8532756bbbc4b7f32dda40d05981c8aeffd80" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67474dddf3fe6f530435d2fe22e4fc006ee05340533b555830b92a2477840979
[INFO] running `Command { std: "docker" "start" "-a" "67474dddf3fe6f530435d2fe22e4fc006ee05340533b555830b92a2477840979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67474dddf3fe6f530435d2fe22e4fc006ee05340533b555830b92a2477840979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67474dddf3fe6f530435d2fe22e4fc006ee05340533b555830b92a2477840979", kill_on_drop: false }`
[INFO] [stdout] 67474dddf3fe6f530435d2fe22e4fc006ee05340533b555830b92a2477840979
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+cbe8532756bbbc4b7f32dda40d05981c8aeffd80" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60b00cc4363f751dabd44600d27c7aa4683afadf36dcb247eba1d7dfe753fdb1
[INFO] running `Command { std: "docker" "start" "-a" "60b00cc4363f751dabd44600d27c7aa4683afadf36dcb247eba1d7dfe753fdb1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking hex v0.4.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr] error: failed to run custom build command for `rustversion v1.0.2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rustversion-60f4bf2a5dfd251b/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: unexpected output from `rustc --version`: ""
[INFO] [stderr] 
[INFO] [stderr]   Please file an issue in https://github.com/dtolnay/rustversion
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "60b00cc4363f751dabd44600d27c7aa4683afadf36dcb247eba1d7dfe753fdb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60b00cc4363f751dabd44600d27c7aa4683afadf36dcb247eba1d7dfe753fdb1", kill_on_drop: false }`
[INFO] [stdout] 60b00cc4363f751dabd44600d27c7aa4683afadf36dcb247eba1d7dfe753fdb1