[INFO] fetching crate flipdot-serial 0.6.0...
[INFO] testing flipdot-serial-0.6.0 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate flipdot-serial 0.6.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate flipdot-serial 0.6.0 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flipdot-serial 0.6.0
[INFO] finished tweaking crates.io crate flipdot-serial 0.6.0
[INFO] tweaked toml for crates.io crate flipdot-serial 0.6.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42cb02da7ab7792e2f4a832bc52ebdfa6c2dbbbf108c68c8fa3183056e475455
[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" "42cb02da7ab7792e2f4a832bc52ebdfa6c2dbbbf108c68c8fa3183056e475455", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42cb02da7ab7792e2f4a832bc52ebdfa6c2dbbbf108c68c8fa3183056e475455", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42cb02da7ab7792e2f4a832bc52ebdfa6c2dbbbf108c68c8fa3183056e475455", kill_on_drop: false }`
[INFO] [stdout] 42cb02da7ab7792e2f4a832bc52ebdfa6c2dbbbf108c68c8fa3183056e475455
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 596dba86d31b8df493db7bc2e46e50db04f9558ce10e5df7e7fa8e64902ce333
[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" "596dba86d31b8df493db7bc2e46e50db04f9558ce10e5df7e7fa8e64902ce333", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling serial-core v0.4.0
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]    Compiling thiserror v1.0.26
[INFO] [stderr]    Compiling flipdot-core v0.6.0
[INFO] [stderr]    Compiling flipdot-serial v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.48s
[INFO] running `Command { std: "docker" "inspect" "596dba86d31b8df493db7bc2e46e50db04f9558ce10e5df7e7fa8e64902ce333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "596dba86d31b8df493db7bc2e46e50db04f9558ce10e5df7e7fa8e64902ce333", kill_on_drop: false }`
[INFO] [stdout] 596dba86d31b8df493db7bc2e46e50db04f9558ce10e5df7e7fa8e64902ce333
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ea1fec6230020032f0076df934e426216e2d61674d8b5f8ecfccc002a3ecd4f
[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" "7ea1fec6230020032f0076df934e426216e2d61674d8b5f8ecfccc002a3ecd4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling flipdot-serial v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "7ea1fec6230020032f0076df934e426216e2d61674d8b5f8ecfccc002a3ecd4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ea1fec6230020032f0076df934e426216e2d61674d8b5f8ecfccc002a3ecd4f", kill_on_drop: false }`
[INFO] [stdout] 7ea1fec6230020032f0076df934e426216e2d61674d8b5f8ecfccc002a3ecd4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", 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] 1f0a28401d33387111c450e655e5da1853a32355be7469c17d58ce256f3677bf
[INFO] running `Command { std: "docker" "start" "-a" "1f0a28401d33387111c450e655e5da1853a32355be7469c17d58ce256f3677bf", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/flipdot_serial-af557da7b2fc7559)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests flipdot-serial
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/serial_sign_bus.rs - serial_sign_bus::SerialSignBus<P>::try_new (line 48) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - (line 13) - compile ... FAILED
[INFO] [stdout] test src/serial_sign_bus.rs - serial_sign_bus::SerialSignBus (line 20) - compile ... FAILED
[INFO] [stdout] test src/serial_port.rs - serial_port::configure_port (line 16) - compile ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/serial_sign_bus.rs - serial_sign_bus::SerialSignBus<P>::try_new (line 48) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serial`
[INFO] [stdout]  --> src/serial_sign_bus.rs:52:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | let port = serial::open("COM3")?;
[INFO] [stdout]   |            ^^^^^^ use of undeclared crate or module `serial`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 13) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serial`
[INFO] [stdout]  --> src/lib.rs:18:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | let mut port = serial::open("COM3")?;
[INFO] [stdout]   |                ^^^^^^ use of undeclared crate or module `serial`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/serial_sign_bus.rs - serial_sign_bus::SerialSignBus (line 20) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serial`
[INFO] [stdout]  --> src/serial_sign_bus.rs:25:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | let port = serial::open("/dev/ttyUSB0")?;
[INFO] [stdout]   |            ^^^^^^ use of undeclared crate or module `serial`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/serial_port.rs - serial_port::configure_port (line 16) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serial`
[INFO] [stdout]  --> src/serial_port.rs:21:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | let mut port = serial::open("COM3")?;
[INFO] [stdout]   |                ^^^^^^ use of undeclared crate or module `serial`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 13)
[INFO] [stdout]     src/serial_port.rs - serial_port::configure_port (line 16)
[INFO] [stdout]     src/serial_sign_bus.rs - serial_sign_bus::SerialSignBus (line 20)
[INFO] [stdout]     src/serial_sign_bus.rs - serial_sign_bus::SerialSignBus<P>::try_new (line 48)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.37s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "1f0a28401d33387111c450e655e5da1853a32355be7469c17d58ce256f3677bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f0a28401d33387111c450e655e5da1853a32355be7469c17d58ce256f3677bf", kill_on_drop: false }`
[INFO] [stdout] 1f0a28401d33387111c450e655e5da1853a32355be7469c17d58ce256f3677bf