[INFO] fetching crate nc 0.7.9...
[INFO] testing nc-0.7.9 against 1.55.0 for beta-1.56-1
[INFO] extracting crate nc 0.7.9 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate nc 0.7.9 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 nc 0.7.9
[INFO] finished tweaking crates.io crate nc 0.7.9
[INFO] tweaked toml for crates.io crate nc 0.7.9 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate nc 0.7.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] be025fc6cd20bd6e2e4259951867ad7c1e56de41c1064733b4150c0309040224
[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" "be025fc6cd20bd6e2e4259951867ad7c1e56de41c1064733b4150c0309040224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be025fc6cd20bd6e2e4259951867ad7c1e56de41c1064733b4150c0309040224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be025fc6cd20bd6e2e4259951867ad7c1e56de41c1064733b4150c0309040224", kill_on_drop: false }`
[INFO] [stdout] be025fc6cd20bd6e2e4259951867ad7c1e56de41c1064733b4150c0309040224
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 90080f53298c6e11f2d6c3cee38073f28b8daa91b60551a8b66f407445993330
[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" "90080f53298c6e11f2d6c3cee38073f28b8daa91b60551a8b66f407445993330", kill_on_drop: false }`
[INFO] [stderr]    Compiling nc v0.7.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.19s
[INFO] running `Command { std: "docker" "inspect" "90080f53298c6e11f2d6c3cee38073f28b8daa91b60551a8b66f407445993330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90080f53298c6e11f2d6c3cee38073f28b8daa91b60551a8b66f407445993330", kill_on_drop: false }`
[INFO] [stdout] 90080f53298c6e11f2d6c3cee38073f28b8daa91b60551a8b66f407445993330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4056fba645f8ffc4b947c7a4108aff04fe047cfddd6396c23c2dfdfe967e8be4
[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" "4056fba645f8ffc4b947c7a4108aff04fe047cfddd6396c23c2dfdfe967e8be4", kill_on_drop: false }`
[INFO] [stderr]    Compiling nc v0.7.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `alarm`
[INFO] [stdout]   --> examples/utils/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn alarm(seconds: u32) -> Result<u32, nc::Errno> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `alarm`
[INFO] [stdout]   --> examples/utils/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn alarm(seconds: u32) -> Result<u32, nc::Errno> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `alarm`
[INFO] [stdout]   --> examples/utils/mod.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn alarm(seconds: u32) -> Result<u32, nc::Errno> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `handle_restore`
[INFO] [stdout]  --> examples/timer.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn handle_restore() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/socket.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     loop {
[INFO] [stdout] 28 | |         let mut conn_addr = nc::sockaddr_in_t::default();
[INFO] [stdout] 29 | |         let mut conn_addr_len: nc::socklen_t = 0;
[INFO] [stdout] 30 | |         let conn_fd = nc::accept4(
[INFO] [stdout] ...  |
[INFO] [stdout] 36 | |         println!("conn_fd: {:?}", conn_fd);
[INFO] [stdout] 37 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 38 | 
[INFO] [stdout] 39 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.09s
[INFO] running `Command { std: "docker" "inspect" "4056fba645f8ffc4b947c7a4108aff04fe047cfddd6396c23c2dfdfe967e8be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4056fba645f8ffc4b947c7a4108aff04fe047cfddd6396c23c2dfdfe967e8be4", kill_on_drop: false }`
[INFO] [stdout] 4056fba645f8ffc4b947c7a4108aff04fe047cfddd6396c23c2dfdfe967e8be4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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] a3d63f0cb4a3b6ede34a7910199bb49fd109b172880634d4bddc5a77cadf3f60
[INFO] running `Command { std: "docker" "start" "-a" "a3d63f0cb4a3b6ede34a7910199bb49fd109b172880634d4bddc5a77cadf3f60", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `alarm`
[INFO] [stderr]   --> examples/utils/mod.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn alarm(seconds: u32) -> Result<u32, nc::Errno> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `nc` (example "resource_limit") generated 1 warning
[INFO] [stderr] warning: function is never used: `handle_restore`
[INFO] [stderr]  --> examples/timer.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn handle_restore() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `nc` (example "timer") generated 2 warnings (1 duplicate)
[INFO] [stderr] warning: `nc` (example "prctl") generated 1 warning (1 duplicate)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> examples/socket.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | /     loop {
[INFO] [stderr] 28 | |         let mut conn_addr = nc::sockaddr_in_t::default();
[INFO] [stderr] 29 | |         let mut conn_addr_len: nc::socklen_t = 0;
[INFO] [stderr] 30 | |         let conn_fd = nc::accept4(
[INFO] [stderr] ...  |
[INFO] [stderr] 36 | |         println!("conn_fd: {:?}", conn_fd);
[INFO] [stderr] 37 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 38 | 
[INFO] [stderr] 39 |       Ok(())
[INFO] [stderr]    |       ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `nc` (example "socket") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/nc-8497a5a43ce02d49)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nc
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name nc --test /opt/rustwide/workdir/src/lib.rs -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps -L native=/opt/rustwide/target/debug/build/nc-e0af26d901de0207/out --extern nc=/opt/rustwide/target/debug/deps/libnc-27f125a89a68315b.rlib -C embed-bitcode=no --cfg 'feature="default"' --cfg 'feature="std"' --error-format human` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "a3d63f0cb4a3b6ede34a7910199bb49fd109b172880634d4bddc5a77cadf3f60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3d63f0cb4a3b6ede34a7910199bb49fd109b172880634d4bddc5a77cadf3f60", kill_on_drop: false }`
[INFO] [stdout] a3d63f0cb4a3b6ede34a7910199bb49fd109b172880634d4bddc5a77cadf3f60