[INFO] fetching crate blkid 0.2.1...
[INFO] testing blkid-0.2.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate blkid 0.2.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate blkid 0.2.1 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 blkid 0.2.1
[INFO] finished tweaking crates.io crate blkid 0.2.1
[INFO] tweaked toml for crates.io crate blkid 0.2.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 0f3f5930e56a0af4ad08cfa72304ad3ef506a1f30841a9206e07c82dcc08420a
[INFO] running `Command { std: "docker" "start" "-a" "0f3f5930e56a0af4ad08cfa72304ad3ef506a1f30841a9206e07c82dcc08420a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f3f5930e56a0af4ad08cfa72304ad3ef506a1f30841a9206e07c82dcc08420a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f3f5930e56a0af4ad08cfa72304ad3ef506a1f30841a9206e07c82dcc08420a", kill_on_drop: false }`
[INFO] [stdout] 0f3f5930e56a0af4ad08cfa72304ad3ef506a1f30841a9206e07c82dcc08420a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 2098bd23265b6ce485cd93f17fd669259d4458c55b86620a487e417f2a539bf4
[INFO] running `Command { std: "docker" "start" "-a" "2098bd23265b6ce485cd93f17fd669259d4458c55b86620a487e417f2a539bf4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling bindgen v0.53.3
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling errno v0.2.7
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling blkid-sys v0.1.5
[INFO] [stderr]    Compiling blkid v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:51:32
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn cause(&self) -> Option<&err> {
[INFO] [stdout]    |                                ^^^ help: use `dyn`: `dyn err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:374:61
[INFO] [stdout]     |
[INFO] [stdout] 374 |     pub fn set_partition_flags(&self, flags: u32) -> Result<(&Self), BlkidError> {
[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 parentheses around type
[INFO] [stdout]    --> src/lib.rs:385:48
[INFO] [stdout]     |
[INFO] [stdout] 385 |     pub fn enable_superblocks(&self) -> Result<(&Self), BlkidError> {
[INFO] [stdout]     |                                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:37:26
[INFO] [stdout]    |
[INFO] [stdout] 37 |         f.write_str(self.description())
[INFO] [stdout]    |                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:44:51
[INFO] [stdout]    |
[INFO] [stdout] 44 |             BlkidError::FromUtf8Error(ref e) => e.description(),
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:45:46
[INFO] [stdout]    |
[INFO] [stdout] 45 |             BlkidError::NulError(ref e) => e.description(),
[INFO] [stdout]    |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:47:45
[INFO] [stdout]    |
[INFO] [stdout] 47 |             BlkidError::IoError(ref e) => e.description(),
[INFO] [stdout]    |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:48:53
[INFO] [stdout]    |
[INFO] [stdout] 48 |             BlkidError::IntoStringError(ref e) => e.description(),
[INFO] [stdout]    |                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:53:51
[INFO] [stdout]    |
[INFO] [stdout] 53 |             BlkidError::FromUtf8Error(ref e) => e.cause(),
[INFO] [stdout]    |                                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:54:46
[INFO] [stdout]    |
[INFO] [stdout] 54 |             BlkidError::NulError(ref e) => e.cause(),
[INFO] [stdout]    |                                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:56:45
[INFO] [stdout]    |
[INFO] [stdout] 56 |             BlkidError::IoError(ref e) => e.cause(),
[INFO] [stdout]    |                                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:57:53
[INFO] [stdout]    |
[INFO] [stdout] 57 |             BlkidError::IntoStringError(ref e) => e.cause(),
[INFO] [stdout]    |                                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:71:50
[INFO] [stdout]    |
[INFO] [stdout] 71 |             BlkidError::NulError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:73:49
[INFO] [stdout]    |
[INFO] [stdout] 73 |             BlkidError::IoError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:74:57
[INFO] [stdout]    |
[INFO] [stdout] 74 |             BlkidError::IntoStringError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.88s
[INFO] running `Command { std: "docker" "inspect" "2098bd23265b6ce485cd93f17fd669259d4458c55b86620a487e417f2a539bf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2098bd23265b6ce485cd93f17fd669259d4458c55b86620a487e417f2a539bf4", kill_on_drop: false }`
[INFO] [stdout] 2098bd23265b6ce485cd93f17fd669259d4458c55b86620a487e417f2a539bf4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 360c362513009e017ef28cc811459220c895c55b365dc057d3d363113736d4f3
[INFO] running `Command { std: "docker" "start" "-a" "360c362513009e017ef28cc811459220c895c55b365dc057d3d363113736d4f3", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:51:32
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn cause(&self) -> Option<&err> {
[INFO] [stdout]    |                                ^^^ help: use `dyn`: `dyn err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:374:61
[INFO] [stdout]     |
[INFO] [stdout] 374 |     pub fn set_partition_flags(&self, flags: u32) -> Result<(&Self), BlkidError> {
[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 parentheses around type
[INFO] [stdout]    --> src/lib.rs:385:48
[INFO] [stdout]     |
[INFO] [stdout] 385 |     pub fn enable_superblocks(&self) -> Result<(&Self), BlkidError> {
[INFO] [stdout]     |                                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:37:26
[INFO] [stdout]    |
[INFO] [stdout] 37 |         f.write_str(self.description())
[INFO] [stdout]    |                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:44:51
[INFO] [stdout]    |
[INFO] [stdout] 44 |             BlkidError::FromUtf8Error(ref e) => e.description(),
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:45:46
[INFO] [stdout]    |
[INFO] [stdout] 45 |             BlkidError::NulError(ref e) => e.description(),
[INFO] [stdout]    |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:47:45
[INFO] [stdout]    |
[INFO] [stdout] 47 |             BlkidError::IoError(ref e) => e.description(),
[INFO] [stdout]    |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:48:53
[INFO] [stdout]    |
[INFO] [stdout] 48 |             BlkidError::IntoStringError(ref e) => e.description(),
[INFO] [stdout]    |                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:53:51
[INFO] [stdout]    |
[INFO] [stdout] 53 |             BlkidError::FromUtf8Error(ref e) => e.cause(),
[INFO] [stdout]    |                                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:54:46
[INFO] [stdout]    |
[INFO] [stdout] 54 |             BlkidError::NulError(ref e) => e.cause(),
[INFO] [stdout]    |                                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:56:45
[INFO] [stdout]    |
[INFO] [stdout] 56 |             BlkidError::IoError(ref e) => e.cause(),
[INFO] [stdout]    |                                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:57:53
[INFO] [stdout]    |
[INFO] [stdout] 57 |             BlkidError::IntoStringError(ref e) => e.cause(),
[INFO] [stdout]    |                                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:71:50
[INFO] [stdout]    |
[INFO] [stdout] 71 |             BlkidError::NulError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:73:49
[INFO] [stdout]    |
[INFO] [stdout] 73 |             BlkidError::IoError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:74:57
[INFO] [stdout]    |
[INFO] [stdout] 74 |             BlkidError::IntoStringError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling blkid v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:51:32
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn cause(&self) -> Option<&err> {
[INFO] [stdout]    |                                ^^^ help: use `dyn`: `dyn err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:374:61
[INFO] [stdout]     |
[INFO] [stdout] 374 |     pub fn set_partition_flags(&self, flags: u32) -> Result<(&Self), BlkidError> {
[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 parentheses around type
[INFO] [stdout]    --> src/lib.rs:385:48
[INFO] [stdout]     |
[INFO] [stdout] 385 |     pub fn enable_superblocks(&self) -> Result<(&Self), BlkidError> {
[INFO] [stdout]     |                                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:37:26
[INFO] [stdout]    |
[INFO] [stdout] 37 |         f.write_str(self.description())
[INFO] [stdout]    |                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:44:51
[INFO] [stdout]    |
[INFO] [stdout] 44 |             BlkidError::FromUtf8Error(ref e) => e.description(),
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:45:46
[INFO] [stdout]    |
[INFO] [stdout] 45 |             BlkidError::NulError(ref e) => e.description(),
[INFO] [stdout]    |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:47:45
[INFO] [stdout]    |
[INFO] [stdout] 47 |             BlkidError::IoError(ref e) => e.description(),
[INFO] [stdout]    |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:48:53
[INFO] [stdout]    |
[INFO] [stdout] 48 |             BlkidError::IntoStringError(ref e) => e.description(),
[INFO] [stdout]    |                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:53:51
[INFO] [stdout]    |
[INFO] [stdout] 53 |             BlkidError::FromUtf8Error(ref e) => e.cause(),
[INFO] [stdout]    |                                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:54:46
[INFO] [stdout]    |
[INFO] [stdout] 54 |             BlkidError::NulError(ref e) => e.cause(),
[INFO] [stdout]    |                                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:56:45
[INFO] [stdout]    |
[INFO] [stdout] 56 |             BlkidError::IoError(ref e) => e.cause(),
[INFO] [stdout]    |                                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/lib.rs:57:53
[INFO] [stdout]    |
[INFO] [stdout] 57 |             BlkidError::IntoStringError(ref e) => e.cause(),
[INFO] [stdout]    |                                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:71:50
[INFO] [stdout]    |
[INFO] [stdout] 71 |             BlkidError::NulError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:73:49
[INFO] [stdout]    |
[INFO] [stdout] 73 |             BlkidError::IoError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/lib.rs:74:57
[INFO] [stdout]    |
[INFO] [stdout] 74 |             BlkidError::IntoStringError(ref err) => err.description().to_string(),
[INFO] [stdout]    |                                                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "360c362513009e017ef28cc811459220c895c55b365dc057d3d363113736d4f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "360c362513009e017ef28cc811459220c895c55b365dc057d3d363113736d4f3", kill_on_drop: false }`
[INFO] [stdout] 360c362513009e017ef28cc811459220c895c55b365dc057d3d363113736d4f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stdout] 5c25e326305d5b98fda143ea14fe3d2fdddd76d87aebae709c75bddd6f09f653
[INFO] running `Command { std: "docker" "start" "-a" "5c25e326305d5b98fda143ea14fe3d2fdddd76d87aebae709c75bddd6f09f653", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:51:32
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn cause(&self) -> Option<&err> {
[INFO] [stderr]    |                                ^^^ help: use `dyn`: `dyn err`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:374:61
[INFO] [stderr]     |
[INFO] [stderr] 374 |     pub fn set_partition_flags(&self, flags: u32) -> Result<(&Self), BlkidError> {
[INFO] [stderr]     |                                                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:385:48
[INFO] [stderr]     |
[INFO] [stderr] 385 |     pub fn enable_superblocks(&self) -> Result<(&Self), BlkidError> {
[INFO] [stderr]     |                                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:37:26
[INFO] [stderr]    |
[INFO] [stderr] 37 |         f.write_str(self.description())
[INFO] [stderr]    |                          ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:44:51
[INFO] [stderr]    |
[INFO] [stderr] 44 |             BlkidError::FromUtf8Error(ref e) => e.description(),
[INFO] [stderr]    |                                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:45:46
[INFO] [stderr]    |
[INFO] [stderr] 45 |             BlkidError::NulError(ref e) => e.description(),
[INFO] [stderr]    |                                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:47:45
[INFO] [stderr]    |
[INFO] [stderr] 47 |             BlkidError::IoError(ref e) => e.description(),
[INFO] [stderr]    |                                             ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:48:53
[INFO] [stderr]    |
[INFO] [stderr] 48 |             BlkidError::IntoStringError(ref e) => e.description(),
[INFO] [stderr]    |                                                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:53:51
[INFO] [stderr]    |
[INFO] [stderr] 53 |             BlkidError::FromUtf8Error(ref e) => e.cause(),
[INFO] [stderr]    |                                                   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:54:46
[INFO] [stderr]    |
[INFO] [stderr] 54 |             BlkidError::NulError(ref e) => e.cause(),
[INFO] [stderr]    |                                              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:56:45
[INFO] [stderr]    |
[INFO] [stderr] 56 |             BlkidError::IoError(ref e) => e.cause(),
[INFO] [stderr]    |                                             ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:57:53
[INFO] [stderr]    |
[INFO] [stderr] 57 |             BlkidError::IntoStringError(ref e) => e.cause(),
[INFO] [stderr]    |                                                     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:71:50
[INFO] [stderr]    |
[INFO] [stderr] 71 |             BlkidError::NulError(ref err) => err.description().to_string(),
[INFO] [stderr]    |                                                  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:73:49
[INFO] [stderr]    |
[INFO] [stderr] 73 |             BlkidError::IoError(ref err) => err.description().to_string(),
[INFO] [stderr]    |                                                 ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:74:57
[INFO] [stderr]    |
[INFO] [stderr] 74 |             BlkidError::IntoStringError(ref err) => err.description().to_string(),
[INFO] [stderr]    |                                                         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `blkid` (lib) generated 15 warnings
[INFO] [stderr] warning: `blkid` (lib test) generated 15 warnings (15 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/blkid-c82edaea24718c2e)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests blkid
[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] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:374:61
[INFO] [stderr]     |
[INFO] [stderr] 374 |     pub fn set_partition_flags(&self, flags: u32) -> Result<(&Self), BlkidError> {
[INFO] [stderr]     |                                                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:385:48
[INFO] [stderr]     |
[INFO] [stderr] 385 |     pub fn enable_superblocks(&self) -> Result<(&Self), BlkidError> {
[INFO] [stderr]     |                                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[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] running `Command { std: "docker" "inspect" "5c25e326305d5b98fda143ea14fe3d2fdddd76d87aebae709c75bddd6f09f653", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c25e326305d5b98fda143ea14fe3d2fdddd76d87aebae709c75bddd6f09f653", kill_on_drop: false }`
[INFO] [stdout] 5c25e326305d5b98fda143ea14fe3d2fdddd76d87aebae709c75bddd6f09f653