[INFO] fetching crate cmb 0.0.2...
[INFO] testing cmb-0.0.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate cmb 0.0.2 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate cmb 0.0.2
[INFO] finished tweaking crates.io crate cmb 0.0.2
[INFO] tweaked toml for crates.io crate cmb 0.0.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate cmb 0.0.2 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate cmb 0.0.2 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ebff952280f10859672fc766efe97856b3aed1066c50ba767d6fcb8dad9c519
[INFO] running `Command { std: "docker" "start" "-a" "0ebff952280f10859672fc766efe97856b3aed1066c50ba767d6fcb8dad9c519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ebff952280f10859672fc766efe97856b3aed1066c50ba767d6fcb8dad9c519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ebff952280f10859672fc766efe97856b3aed1066c50ba767d6fcb8dad9c519", kill_on_drop: false }`
[INFO] [stdout] 0ebff952280f10859672fc766efe97856b3aed1066c50ba767d6fcb8dad9c519
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1eabac4ae80971a7ac904068ae71c6f2a17e1ee66b689c21c41a97507d78da3f
[INFO] running `Command { std: "docker" "start" "-a" "1eabac4ae80971a7ac904068ae71c6f2a17e1ee66b689c21c41a97507d78da3f", kill_on_drop: false }`
[INFO] [stderr]    Compiling cmb v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "1eabac4ae80971a7ac904068ae71c6f2a17e1ee66b689c21c41a97507d78da3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eabac4ae80971a7ac904068ae71c6f2a17e1ee66b689c21c41a97507d78da3f", kill_on_drop: false }`
[INFO] [stdout] 1eabac4ae80971a7ac904068ae71c6f2a17e1ee66b689c21c41a97507d78da3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 87062ec33a8b7d037988e25cd787f705d206c186ec0e06ea8df6ac0ac33c504a
[INFO] running `Command { std: "docker" "start" "-a" "87062ec33a8b7d037988e25cd787f705d206c186ec0e06ea8df6ac0ac33c504a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cmb v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0601]: `main` function not found in crate `app`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `examples/app.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cmb` (example "app") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "87062ec33a8b7d037988e25cd787f705d206c186ec0e06ea8df6ac0ac33c504a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87062ec33a8b7d037988e25cd787f705d206c186ec0e06ea8df6ac0ac33c504a", kill_on_drop: false }`
[INFO] [stdout] 87062ec33a8b7d037988e25cd787f705d206c186ec0e06ea8df6ac0ac33c504a