[INFO] fetching crate synthizer 0.5.6...
[INFO] testing synthizer-0.5.6 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate synthizer 0.5.6 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate synthizer 0.5.6
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate synthizer 0.5.6
[INFO] tweaked toml for crates.io crate synthizer 0.5.6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate synthizer 0.5.6 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate synthizer 0.5.6 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-ident v1.0.7
[INFO] [stderr]   Downloaded relative-path v1.7.3
[INFO] [stderr]   Downloaded cmake v0.1.49
[INFO] [stderr]   Downloaded asset_lru v0.1.3
[INFO] [stderr]   Downloaded derive_builder_macro v0.10.2
[INFO] [stderr]   Downloaded derive_builder v0.10.2
[INFO] [stderr]   Downloaded darling_macro v0.12.4
[INFO] [stderr]   Downloaded derive_builder_core v0.10.2
[INFO] [stderr]   Downloaded darling v0.12.4
[INFO] [stderr]   Downloaded darling_core v0.12.4
[INFO] [stderr]   Downloaded synthizer-sys v0.10.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012
[INFO] running `Command { std: "docker" "start" "39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cmake v0.1.49
[INFO] [stderr]    Compiling synthizer-sys v0.10.10
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012", kill_on_drop: false }`
[INFO] [stdout] 39a8fbc38d767309939b0a8f937c5e226b0371e940f80ade45116f7fb476b012
