[INFO] fetching crate merfolk_backend_serialport 0.1.0...
[INFO] checking merfolk_backend_serialport-0.1.0 against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] extracting crate merfolk_backend_serialport 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate merfolk_backend_serialport 0.1.0 on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate merfolk_backend_serialport 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate merfolk_backend_serialport 0.1.0
[INFO] tweaked toml for crates.io crate merfolk_backend_serialport 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] adba70162484136e0efae56f2c078966ebbbd40254782b7ec3a2c770d1642cce
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "adba70162484136e0efae56f2c078966ebbbd40254782b7ec3a2c770d1642cce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "adba70162484136e0efae56f2c078966ebbbd40254782b7ec3a2c770d1642cce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adba70162484136e0efae56f2c078966ebbbd40254782b7ec3a2c770d1642cce", kill_on_drop: false }`
[INFO] [stdout] adba70162484136e0efae56f2c078966ebbbd40254782b7ec3a2c770d1642cce
[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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7093175ba1f740b7773b459bf62cc54bafb321598448d1ab2ee7aba8ef66772f
[INFO] running `Command { std: "docker" "start" "-a" "7093175ba1f740b7773b459bf62cc54bafb321598448d1ab2ee7aba8ef66772f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]    Compiling tokio v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking serialport v4.0.0
[INFO] [stderr]     Checking merfolk v0.1.4
[INFO] [stderr]     Checking ron v0.6.4
[INFO] [stderr]     Checking merfolk_backend_serialport v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `merfolk_frontend_register`
[INFO] [stdout]    --> test/tests.rs:153:25
[INFO] [stdout]     |
[INFO] [stdout] 153 |   let register_caller = merfolk_frontend_register::Register::builder().build().unwrap();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `merfolk_frontend_register`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `merfolk_frontend_register`
[INFO] [stdout]    --> test/tests.rs:154:27
[INFO] [stdout]     |
[INFO] [stdout] 154 |   let register_receiver = merfolk_frontend_register::Register::builder().build().unwrap();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `merfolk_frontend_register`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `merfolk_backend_serialport`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "7093175ba1f740b7773b459bf62cc54bafb321598448d1ab2ee7aba8ef66772f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7093175ba1f740b7773b459bf62cc54bafb321598448d1ab2ee7aba8ef66772f", kill_on_drop: false }`
[INFO] [stdout] 7093175ba1f740b7773b459bf62cc54bafb321598448d1ab2ee7aba8ef66772f