[INFO] fetching crate dd-lib 0.2.1...
[INFO] checking dd-lib-0.2.1 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate dd-lib 0.2.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate dd-lib 0.2.1 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dd-lib 0.2.1
[INFO] finished tweaking crates.io crate dd-lib 0.2.1
[INFO] tweaked toml for crates.io crate dd-lib 0.2.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb0a023f566ae1055f8ad36d480674e9334949b74e7ddca9a298db95a443991d
[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" "eb0a023f566ae1055f8ad36d480674e9334949b74e7ddca9a298db95a443991d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb0a023f566ae1055f8ad36d480674e9334949b74e7ddca9a298db95a443991d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb0a023f566ae1055f8ad36d480674e9334949b74e7ddca9a298db95a443991d", kill_on_drop: false }`
[INFO] [stdout] eb0a023f566ae1055f8ad36d480674e9334949b74e7ddca9a298db95a443991d
[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=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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f5813f4247c871256af0f91afe85760ad864e0511ebc3cb2b599e0a13ec5090
[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" "8f5813f4247c871256af0f91afe85760ad864e0511ebc3cb2b599e0a13ec5090", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking encoding8 v0.3.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking dd-lib v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/io/tests.rs:17:56
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn write(&mut self, buf: &[u8]) -> std::io::Result<(usize)> { Ok(buf.len()) }
[INFO] [stdout]    |                                                        ^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around assigned value
[INFO] [stdout]   --> src/opts/flags/iflag.rs:71:22
[INFO] [stdout]    |
[INFO] [stdout] 71 |             flags |= { Self::from_str(flag)? };
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around assigned value
[INFO] [stdout]   --> src/opts/flags/iflag.rs:71:22
[INFO] [stdout]    |
[INFO] [stdout] 71 |             flags |= { Self::from_str(flag)? };
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/io/errhandler.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 writeln!(self.e, "io error: <{}>; continuing", err);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/io/errhandler.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 | /             writeln!(
[INFO] [stdout] 73 | |                 self,
[INFO] [stdout] 74 | |                 "dd in progress: unblock: elapsed: {}, wrote {} lines",
[INFO] [stdout] 75 | |                 elapsed(&start),
[INFO] [stdout] 76 | |                 lines
[INFO] [stdout] 77 | |             );
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/io/errhandler.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 | /             writeln!(
[INFO] [stdout] 84 | |                 self,
[INFO] [stdout] 85 | |                 "dd in progress: unblock: elapsed: {}, wrote {} fixed-length blocks",
[INFO] [stdout] 86 | |                 elapsed(&start),
[INFO] [stdout] 87 | |                 blocks
[INFO] [stdout] 88 | |             );
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/io/errhandler.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 writeln!(self.e, "io error: <{}>; continuing", err);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/io/errhandler.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 | /             writeln!(
[INFO] [stdout] 73 | |                 self,
[INFO] [stdout] 74 | |                 "dd in progress: unblock: elapsed: {}, wrote {} lines",
[INFO] [stdout] 75 | |                 elapsed(&start),
[INFO] [stdout] 76 | |                 lines
[INFO] [stdout] 77 | |             );
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/io/errhandler.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 | /             writeln!(
[INFO] [stdout] 84 | |                 self,
[INFO] [stdout] 85 | |                 "dd in progress: unblock: elapsed: {}, wrote {} fixed-length blocks",
[INFO] [stdout] 86 | |                 elapsed(&start),
[INFO] [stdout] 87 | |                 blocks
[INFO] [stdout] 88 | |             );
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.52s
[INFO] running `Command { std: "docker" "inspect" "8f5813f4247c871256af0f91afe85760ad864e0511ebc3cb2b599e0a13ec5090", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f5813f4247c871256af0f91afe85760ad864e0511ebc3cb2b599e0a13ec5090", kill_on_drop: false }`
[INFO] [stdout] 8f5813f4247c871256af0f91afe85760ad864e0511ebc3cb2b599e0a13ec5090