[INFO] fetching crate dd-lib 0.2.1...
[INFO] testing dd-lib-0.2.1 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate dd-lib 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate dd-lib 0.2.1 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", 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] e52a31c601aac82a163485558ca4165d844af015c0116de50cd907a2a7229071
[INFO] running `Command { std: "docker" "start" "-a" "e52a31c601aac82a163485558ca4165d844af015c0116de50cd907a2a7229071", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e52a31c601aac82a163485558ca4165d844af015c0116de50cd907a2a7229071", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e52a31c601aac82a163485558ca4165d844af015c0116de50cd907a2a7229071", kill_on_drop: false }`
[INFO] [stdout] e52a31c601aac82a163485558ca4165d844af015c0116de50cd907a2a7229071
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b719e6792075be4e12a4e778f65b8ee783a395a01d31a7c67cc4492679e60dd
[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" "2b719e6792075be4e12a4e778f65b8ee783a395a01d31a7c67cc4492679e60dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling encoding8 v0.3.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling dd-lib v0.2.1 (/opt/rustwide/workdir)
[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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.30s
[INFO] running `Command { std: "docker" "inspect" "2b719e6792075be4e12a4e778f65b8ee783a395a01d31a7c67cc4492679e60dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b719e6792075be4e12a4e778f65b8ee783a395a01d31a7c67cc4492679e60dd", kill_on_drop: false }`
[INFO] [stdout] 2b719e6792075be4e12a4e778f65b8ee783a395a01d31a7c67cc4492679e60dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6bcddbd4bb83da1383a931be2438dafa97117ff75d11387439e842955a1e70f
[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" "e6bcddbd4bb83da1383a931be2438dafa97117ff75d11387439e842955a1e70f", kill_on_drop: false }`
[INFO] [stderr]    Compiling dd-lib v0.2.1 (/opt/rustwide/workdir)
[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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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: 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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.07s
[INFO] running `Command { std: "docker" "inspect" "e6bcddbd4bb83da1383a931be2438dafa97117ff75d11387439e842955a1e70f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6bcddbd4bb83da1383a931be2438dafa97117ff75d11387439e842955a1e70f", kill_on_drop: false }`
[INFO] [stdout] e6bcddbd4bb83da1383a931be2438dafa97117ff75d11387439e842955a1e70f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 21b30ef9ae8dbbe9784ac38b48a5cb4bc1c754e38c21ef483159f2a4e54edf8d
[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" "21b30ef9ae8dbbe9784ac38b48a5cb4bc1c754e38c21ef483159f2a4e54edf8d", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]   --> src/opts/flags/iflag.rs:71:22
[INFO] [stderr]    |
[INFO] [stderr] 71 |             flags |= { Self::from_str(flag)? };
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 writeln!(self.e, "io error: <{}>; continuing", err);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 | /             writeln!(
[INFO] [stderr] 73 | |                 self,
[INFO] [stderr] 74 | |                 "dd in progress: unblock: elapsed: {}, wrote {} lines",
[INFO] [stderr] 75 | |                 elapsed(&start),
[INFO] [stderr] 76 | |                 lines
[INFO] [stderr] 77 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:83:13
[INFO] [stderr]    |
[INFO] [stderr] 83 | /             writeln!(
[INFO] [stderr] 84 | |                 self,
[INFO] [stderr] 85 | |                 "dd in progress: unblock: elapsed: {}, wrote {} fixed-length blocks",
[INFO] [stderr] 86 | |                 elapsed(&start),
[INFO] [stderr] 87 | |                 blocks
[INFO] [stderr] 88 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/io/tests.rs:17:56
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn write(&mut self, buf: &[u8]) -> std::io::Result<(usize)> { Ok(buf.len()) }
[INFO] [stderr]    |                                                        ^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]   --> src/opts/flags/iflag.rs:71:22
[INFO] [stderr]    |
[INFO] [stderr] 71 |             flags |= { Self::from_str(flag)? };
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 writeln!(self.e, "io error: <{}>; continuing", err);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 | /             writeln!(
[INFO] [stderr] 73 | |                 self,
[INFO] [stderr] 74 | |                 "dd in progress: unblock: elapsed: {}, wrote {} lines",
[INFO] [stderr] 75 | |                 elapsed(&start),
[INFO] [stderr] 76 | |                 lines
[INFO] [stderr] 77 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:83:13
[INFO] [stderr]    |
[INFO] [stderr] 83 | /             writeln!(
[INFO] [stderr] 84 | |                 self,
[INFO] [stderr] 85 | |                 "dd in progress: unblock: elapsed: {}, wrote {} fixed-length blocks",
[INFO] [stderr] 86 | |                 elapsed(&start),
[INFO] [stderr] 87 | |                 blocks
[INFO] [stderr] 88 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/dd_lib-090767c128952921
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test io::tests::test_standard ... ok
[INFO] [stdout] test opts::flags::tests::iflag ... ok
[INFO] [stdout] test opts::flags::tests::oflag ... ok
[INFO] [stdout] test opts::flags::tests::cflag ... ok
[INFO] [stdout] test io::tests::test_unblock ... ok
[INFO] [stdout] test io::tests::test_block ... ok
[INFO] [stdout] test io::tests::test_limited_copy ... ok
[INFO] [stdout] test tests::block ... ok
[INFO] [stdout] test tests::seek_input_and_block_size ... ok
[INFO] [stdout] test tests::base_case ... ok
[INFO] [stdout] test tests::conversion_to_uppercase ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests dd-lib
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]   --> /opt/rustwide/workdir/src/opts/flags/iflag.rs:71:22
[INFO] [stderr]    |
[INFO] [stderr] 71 |             flags |= { Self::from_str(flag)? };
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/opts/mod.rs - opts::Opts::iflag (line 302) ... ok
[INFO] [stdout] test src/opts/mod.rs - opts::keyval (line 328) ... ok
[INFO] [stdout] test src/io/copy.rs - io::copy::fill_buf_to (line 191) ... ok
[INFO] [stdout] test src/io/copy.rs - io::copy::fill_buf_until_match (line 168) ... ok
[INFO] [stdout] test src/opts/number.rs - opts::number::parse (line 10) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "21b30ef9ae8dbbe9784ac38b48a5cb4bc1c754e38c21ef483159f2a4e54edf8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21b30ef9ae8dbbe9784ac38b48a5cb4bc1c754e38c21ef483159f2a4e54edf8d", kill_on_drop: false }`
[INFO] [stdout] 21b30ef9ae8dbbe9784ac38b48a5cb4bc1c754e38c21ef483159f2a4e54edf8d