[INFO] fetching crate syntax_ast_builder 0.1.0...
[INFO] testing syntax_ast_builder-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate syntax_ast_builder 0.1.0 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate syntax_ast_builder 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syntax_ast_builder 0.1.0
[INFO] finished tweaking crates.io crate syntax_ast_builder 0.1.0
[INFO] tweaked toml for crates.io crate syntax_ast_builder 0.1.0 written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "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-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc1fc9bebfc96c3395c07cc3f57bdbcf50a3885cf640855ca0ace8f5e255fc5e
[INFO] running `Command { std: "docker" "start" "-a" "fc1fc9bebfc96c3395c07cc3f57bdbcf50a3885cf640855ca0ace8f5e255fc5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc1fc9bebfc96c3395c07cc3f57bdbcf50a3885cf640855ca0ace8f5e255fc5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc1fc9bebfc96c3395c07cc3f57bdbcf50a3885cf640855ca0ace8f5e255fc5e", kill_on_drop: false }`
[INFO] [stdout] fc1fc9bebfc96c3395c07cc3f57bdbcf50a3885cf640855ca0ace8f5e255fc5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3cfe4ea88ba493ee9ea72c1d4bc80774e4115e2eb3e4add045451fed0a6be5a
[INFO] running `Command { std: "docker" "start" "-a" "e3cfe4ea88ba493ee9ea72c1d4bc80774e4115e2eb3e4add045451fed0a6be5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syntax_ast_builder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate syntax;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syntax_ast_builder` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e3cfe4ea88ba493ee9ea72c1d4bc80774e4115e2eb3e4add045451fed0a6be5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3cfe4ea88ba493ee9ea72c1d4bc80774e4115e2eb3e4add045451fed0a6be5a", kill_on_drop: false }`
[INFO] [stdout] e3cfe4ea88ba493ee9ea72c1d4bc80774e4115e2eb3e4add045451fed0a6be5a